{"id":618,"date":"2024-11-13T14:05:51","date_gmt":"2024-11-13T05:05:51","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=618"},"modified":"2025-03-24T08:52:58","modified_gmt":"2025-03-23T23:52:58","slug":"%e5%88%9d%e5%bf%83%e8%80%85%e3%81%a7%e3%82%82%e3%82%8f%e3%81%8b%e3%82%8b%ef%bc%81java%e3%83%9e%e3%83%ab%e3%83%81%e3%82%b9%e3%83%ac%e3%83%83%e3%83%89%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%892024","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=618","title":{"rendered":"\u521d\u5fc3\u8005\u3067\u3082\u308f\u304b\u308b\uff01Java\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u5b8c\u5168\u30ac\u30a4\u30c92024 &#8211; \u73fe\u5834\u3067\u4f7f\u3048\u308b\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af7\u9078"},"content":{"rendered":"<div id=\"sgb-css-id-1\">\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">\u306f\u3058\u3081\u306b<\/a>  <\/li>  <li>    <a href=\"#i-1\">\uff11\uff0eJava\u306e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-2\">1.1 \u30b9\u30ec\u30c3\u30c9\u306e\u5b9a\u7fa9\u3068\u57fa\u672c\u6982\u5ff5\u3092\u7406\u89e3\u3057\u3088\u3046<\/a>      <\/li>      <li>        <a href=\"#i-3\">1.2 \u306a\u305c\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u5fc5\u8981\u306a\u306e\u304b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">1.3 \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u3068\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u9055\u3044<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">\uff12\uff0e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u5fb9\u5e95\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">2.1 Thread\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3059\u308b\u65b9\u6cd5\u306e\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-12\">2.2 Runnable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306e\u7279\u5fb4<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">2.3 ExecutorService\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-20\">\uff13\uff0e\u30b9\u30ec\u30c3\u30c9\u9593\u306e\u540c\u671f\u51e6\u7406\u3068\u6392\u4ed6\u5236\u5fa1<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">3.1 synchronized\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-25\">3.2 \u30ed\u30c3\u30af\u6a5f\u69cb\u306e\u7a2e\u985e\u3068\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-28\">3.3 \u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u9632\u3050\u305f\u3081\u306e3\u3064\u306e\u539f\u5247<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-33\">\uff14\uff0eJava 8\u4ee5\u964d\u306e\u6700\u65b0\u4e26\u884c\u51e6\u7406API\u6d3b\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-34\">4.1 CompletableFuture\u3067\u975e\u540c\u671f\u51e6\u7406\u3092\u7c21\u6f54\u306b\u66f8\u304f<\/a>      <\/li>      <li>        <a href=\"#i-37\">4.2 \u4e26\u5217\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u4f7f\u7528\u3057\u305f\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u6700\u9069\u5316<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-40\">4.3 ForkJoinPool\u3092\u4f7f\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u30bf\u30b9\u30af\u5206\u5272<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-43\">\uff15\uff0e\u73fe\u5834\u3067\u4f7f\u3048\u308b\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-44\">5.1 \u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u30b5\u30a4\u30ba\u8a2d\u8a08\u6307\u91dd<\/a>      <\/li>      <li>        <a href=\"#i-47\">5.2 \u4f8b\u5916\u51e6\u7406\u306e\u6b63\u3057\u3044\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-50\">5.3 \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u5b9f\u88c5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-54\">\uff16\uff0e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-55\">6.1 \u7af6\u5408\u72b6\u614b\u306e\u7279\u5b9a\u3068\u89e3\u6c7a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-58\">6.2 \u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u8aad\u307f\u65b9\u3068\u6d3b\u7528\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-61\">6.3 \u6027\u80fd\u6e2c\u5b9a\u3068\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u7279\u5b9a\u306e\u624b\u9806<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-66\">\uff17\uff0e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5b9f\u8df5\u6f14\u7fd2<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-67\">7.1 Web\u30af\u30ed\u30fc\u30e9\u30fc\u306e\u4e26\u5217\u5316\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li>        <a href=\"#i-70\">7.2 \u753b\u50cf\u51e6\u7406\u306e\u4e26\u5217\u51e6\u7406\u5b9f\u88c5\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-73\">7.3 \u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u4e26\u5217\u5316\u5b9f\u88c5\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-76\">\uff18\uff0e\u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-77\">8.1 \u672c\u8a18\u4e8b\u306e\u307e\u3068\u3081<\/a>      <\/li>      <li>        <a href=\"#i-78\">8.2 \u5b9f\u8df5\u6f14\u7fd2\u8ab2\u984c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-79\">8.3 \u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">\u306f\u3058\u3081\u306b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p class=\"wp-block-paragraph\">\u8fd1\u5e74\u306eWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30d0\u30c3\u30c1\u51e6\u7406\u3067\u306f\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u52b9\u7387\u7684\u306b\u51e6\u7406\u3059\u308b\u5fc5\u8981\u6027\u304c\u9ad8\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u3093\u306a\u4e2d\u3067\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306f\u907f\u3051\u3066\u306f\u901a\u308c\u306a\u3044\u91cd\u8981\u306a\u6280\u8853\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001Java\u306b\u304a\u3051\u308b\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u3064\u3044\u3066\u3001\u57fa\u790e\u304b\u3089\u5b9f\u8df5\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u307e\u3067\u3001\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u672c\u8a18\u4e8b\u3067\u5b66\u3079\u308b\u3053\u3068<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<p class=\"wp-block-paragraph\">\u2705 \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u57fa\u672c\u6982\u5ff5\u3068\u91cd\u8981\u6027<br>\u2705 3\u3064\u306e\u4e3b\u8981\u306a\u5b9f\u88c5\u65b9\u6cd5\u3068\u305d\u306e\u4f7f\u3044\u5206\u3051<br>\u2705 \u30b9\u30ec\u30c3\u30c9\u9593\u306e\u540c\u671f\u51e6\u7406\u3068\u6392\u4ed6\u5236\u5fa1\u306e\u624b\u6cd5<br>\u2705 Java 8\u4ee5\u964d\u306e\u6700\u65b0\u4e26\u884c\u51e6\u7406API\u306e\u6d3b\u7528\u6cd5<br>\u2705 \u73fe\u5834\u3067\u4f7f\u3048\u308b\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<br>\u2705 \u52b9\u679c\u7684\u306a\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<br>\u2705 \u5b9f\u8df5\u7684\u306a\u5b9f\u88c5\u4f8b\u3068\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/p>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-6\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u524d\u63d0\u77e5\u8b58<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-4\">\n<li>Java\u306e\u57fa\u672c\u6587\u6cd5\u306e\u7406\u89e3<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-5\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u790e<\/li>\n<\/div>\n\n\n<li>\u7c21\u5358\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u306e\u7d4c\u9a13<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<p class=\"wp-block-paragraph\">\u672c\u8a18\u4e8b\u306f\u3001\u6bb5\u968e\u7684\u306b\u89e3\u8aac\u3092\u9032\u3081\u3066\u3044\u304d\u307e\u3059\u306e\u3067\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u304c\u521d\u3081\u3066\u306e\u65b9\u3067\u3082\u7406\u89e3\u3057\u3084\u3059\u3044\u69cb\u6210\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u5404\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u306f\u5b9f\u884c\u53ef\u80fd\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u7528\u610f\u3057\u3001\u5b9f\u8df5\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3082\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<p class=\"wp-block-paragraph\">\u307e\u305f\u3001\u73fe\u5834\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u65b9\u6cd5\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u30dd\u30a4\u30f3\u30c8\u306a\u3069\u3082\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u5b9f\u52d9\u3067\u5373\u6d3b\u7528\u3067\u304d\u308b\u77e5\u8b58\u304c\u8eab\u306b\u3064\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\n<p class=\"wp-block-paragraph\">\u305d\u308c\u3067\u306f\u3001Java\u306e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e16\u754c\u3092\u4e00\u7dd2\u306b\u63a2\u691c\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<h2 class=\"wp-block-heading\" id=\"i-1\">\uff11\uff0eJava\u306e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3068\u306f\uff1f\u57fa\u790e\u304b\u3089\u89e3\u8aac<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">1.1 \u30b9\u30ec\u30c3\u30c9\u306e\u5b9a\u7fa9\u3068\u57fa\u672c\u6982\u5ff5\u3092\u7406\u89e3\u3057\u3088\u3046<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-12\">\n<p class=\"wp-block-paragraph\">\u30b9\u30ec\u30c3\u30c9\u3068\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u5358\u4f4d\u306e\u6700\u5c0f\u5358\u4f4d\u3067\u3059\u3002Java\u306b\u304a\u3044\u3066\u30011\u3064\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u30b9\u30ec\u30c3\u30c9\uff08\u30e1\u30a4\u30f3\u30b9\u30ec\u30c3\u30c9\uff09\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30b9\u30ec\u30c3\u30c9\u306e\u4e3b\u8981\u306a\u7279\u5fb4<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-13\">\n<li>\u72ec\u7acb\u3057\u305f\u5b9f\u884c\u30d1\u30b9<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-14\">\n<li>\u5171\u6709\u30e1\u30e2\u30ea\u7a7a\u9593<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-15\">\n<li>\u8efd\u91cf\u306a\u30d7\u30ed\u30bb\u30b9<\/li>\n<\/div>\n\n\n<li>\u30b9\u30b1\u30b8\u30e5\u30fc\u30e9\u30fc\u306b\u3088\u308b\u7ba1\u7406<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-16\">\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306f\u3001\u57fa\u672c\u7684\u306a\u30b9\u30ec\u30c3\u30c9\u306e\u751f\u6210\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. Thread\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u305f\u57fa\u672c\u7684\u306a\u30b9\u30ec\u30c3\u30c9\u306e\u4f5c\u6210\nThread thread = new Thread(() -&gt; {\n    System.out.println(\"\u65b0\u3057\u3044\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u4e2d\");\n});\nthread.start(); \/\/ \u30b9\u30ec\u30c3\u30c9\u306e\u958b\u59cb\n\n\/\/ 2. \u30b9\u30ec\u30c3\u30c9\u306e\u72b6\u614b\u3092\u78ba\u8a8d\nSystem.out.println(\"\u30b9\u30ec\u30c3\u30c9\u306e\u72b6\u614b: \" + thread.getState());<\/pre>\n\n\n<div id=\"sgb-css-id-17\">\n<h3 class=\"wp-block-heading\" id=\"i-3\">1.2 \u306a\u305c\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u5fc5\u8981\u306a\u306e\u304b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<p class=\"wp-block-paragraph\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u5fc5\u8981\u306a\u7406\u7531\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u5fc5\u8981\u306a\u7406\u7531<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\"><div id=\"sgb-css-id-19\">\n<p class=\"wp-block-paragraph\"><strong>1. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5411\u4e0a<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-20\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf CPU\u8cc7\u6e90\u306e\u52b9\u7387\u7684\u306a\u5229\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-21\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u4e26\u5217\u51e6\u7406\u306b\u3088\u308b\u51e6\u7406\u901f\u5ea6\u306e\u5411\u4e0a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-22\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30ec\u30b9\u30dd\u30f3\u30b9\u6642\u9593\u306e\u6539\u5584<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<p class=\"wp-block-paragraph\"><strong>2. \u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u5229\u7528<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30e1\u30e2\u30ea\u306e\u5171\u6709<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-25\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30b7\u30b9\u30c6\u30e0\u30ea\u30bd\u30fc\u30b9\u306e\u6700\u9069\u5316<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-26\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u306e\u5411\u4e0a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<p class=\"wp-block-paragraph\"><strong>3. \u30e6\u30fc\u30b6\u30fc\u64cd\u4f5c\u306e\u5411\u4e0a<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf UI\u306e\u5fdc\u7b54\u6027\u7dad\u6301<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-29\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u51e6\u7406\u306e\u5b9f\u73fe<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-30\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u975e\u540c\u671f\u51e6\u7406\u306e\u5b9f\u88c5<\/p>\n<\/div><\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\n<h4 class=\"wp-block-heading\" id=\"i-4\">\u5177\u4f53\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/h4>\n<\/div>\n\n<div id=\"id-e9bc853d-79f3-4f10-b416-80f4130972b3\"><div id=\"sgb-css-id-33\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u5b9f\u88c5\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>Web \u30b5\u30fc\u30d0\u30fc<\/td><td>\u8907\u6570\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u540c\u6642\u51e6\u7406<\/td><td>Tomcat, Jetty<\/td><\/tr><tr><td>\u30b2\u30fc\u30e0\u30a8\u30f3\u30b8\u30f3<\/td><td>\u30b9\u30e0\u30fc\u30ba\u306a\u63cf\u753b\u3068\u8a08\u7b97<\/td><td>Unity, Unreal<\/td><\/tr><tr><td>\u30d0\u30c3\u30c1\u51e6\u7406<\/td><td>\u5927\u91cf\u30c7\u30fc\u30bf\u306e\u4e26\u5217\u51e6\u7406<\/td><td>Spring Batch<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-34\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">1.3 \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u3068\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u9055\u3044<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-35\">\n<h4 class=\"wp-block-heading\" id=\"i-6\">1. \u51e6\u7406\u65b9\u5f0f\u306e\u6bd4\u8f03<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\n<p class=\"wp-block-paragraph\">\u3000\u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u3067\u306e\u51e6\u7406\u4f8b\npublic void processDataSingleThread(List&lt;Integer&gt; numbers) {\n    \/\/ \u76f4\u5217\u51e6\u7406\n    numbers.forEach(num -&gt; {\n        heavyCalculation(num);\n    });\n}<\/pre>\n\n\n<div id=\"sgb-css-id-37\">\n<p class=\"wp-block-paragraph\">\u3000\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\uff1a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3067\u306e\u51e6\u7406\u4f8b\npublic void processDataMultiThread(List&lt;Integer&gt; numbers) {\n    \/\/ \u4e26\u5217\u51e6\u7406\n    numbers.parallelStream().forEach(num -&gt; {\n        heavyCalculation(num);\n    });\n}<\/pre>\n\n\n<div id=\"sgb-css-id-38\">\n<h4 class=\"wp-block-heading\" id=\"i-7\">2. \u7279\u5fb4\u306e\u6bd4\u8f03\u8868<\/h4>\n<\/div>\n\n<div id=\"id-b7aaafae-2ef9-4794-a864-c935b0322a8f\"><div id=\"sgb-css-id-39\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7279\u5fb4<\/th><th>\u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9<\/th><th>\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9<\/th><\/tr><\/thead><tbody><tr><td>\u5b9f\u88c5\u306e\u8907\u96d1\u3055<\/td><td>\u7c21\u5358<\/td><td>\u8907\u96d1<\/td><\/tr><tr><td>\u30ea\u30bd\u30fc\u30b9\u6d88\u8cbb<\/td><td>\u5c11\u306a\u3044<\/td><td>\u6bd4\u8f03\u7684\u591a\u3044<\/td><\/tr><tr><td>\u51e6\u7406\u901f\u5ea6<\/td><td>\u9045\u3044\uff08\u4e26\u5217\u51e6\u7406\u4e0d\u53ef\uff09<\/td><td>\u901f\u3044\uff08\u4e26\u5217\u51e6\u7406\u53ef\u80fd\uff09<\/td><\/tr><tr><td>\u30c7\u30d0\u30c3\u30b0<\/td><td>\u5bb9\u6613<\/td><td>\u56f0\u96e3<\/td><\/tr><tr><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/td><td>\u5c11\u306a\u3044<\/td><td>\u6bd4\u8f03\u7684\u591a\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-40\">\n<h4 class=\"wp-block-heading\" id=\"i-8\">3. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u9055\u3044<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<p class=\"wp-block-paragraph\">\u3000\u5178\u578b\u7684\u306a\u30b1\u30fc\u30b9\u3067\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\"><div id=\"sgb-css-id-42\">\n<p class=\"wp-block-paragraph\">\u25cf \u30c7\u30fc\u30bf\u51e6\u7406\uff0810\u4e07\u4ef6\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-43\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\uff1a\u7d0410\u79d2<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-44\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\uff084\u30b3\u30a2\uff09\uff1a\u7d043\u79d2<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-45\">\n<p class=\"wp-block-paragraph\">\u25cf \u30d5\u30a1\u30a4\u30ebI\/O\u51e6\u7406<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\uff1a\u9010\u6b21\u51e6\u7406<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\uff1a\u4e26\u5217\u51e6\u7406\u3067\u6700\u59274\u500d\u306e\u901f\u5ea6\u5411\u4e0a<\/p>\n<\/div><\/div><\/div>\n\n\n<div id=\"sgb-css-id-48\">\n<p class=\"wp-block-paragraph\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u6ce8\u610f\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u6ce8\u610f\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-49\">\n<li>\u30b9\u30ec\u30c3\u30c9\u9593\u306e\u7af6\u5408\u72b6\u614b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-50\">\n<li>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u30ea\u30b9\u30af<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-51\">\n<li>\u30b9\u30ec\u30c3\u30c9\u7ba1\u7406\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/li>\n<\/div>\n\n\n<li>\u9069\u5207\u306a\u30b9\u30ec\u30c3\u30c9\u6570\u306e\u6c7a\u5b9a\u306e\u5fc5\u8981\u6027<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-53\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u57fa\u672c\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u7d9a\u304f\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306e\u3088\u308a\u9ad8\u5ea6\u306a\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u7406\u89e3\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<h2 class=\"wp-block-heading\" id=\"i-9\">\uff12\uff0e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u5fb9\u5e95\u89e3\u8aac<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">2.1 Thread\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3059\u308b\u65b9\u6cd5\u306e\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-56\">\n<p class=\"wp-block-paragraph\">Thread\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3059\u308b\u65b9\u6cd5\u306f\u3001Java\u3067\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u6700\u3082\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u306e1\u3064\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-57\">\n<h4 class=\"wp-block-heading\" id=\"i-11\">\u57fa\u672c\u7684\u306a\u5b9f\u88c5\u4f8b<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class MyThread extends Thread {\n    @Override\n    public void run() {\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u3059\u308b\u51e6\u7406\n        for (int i = 0; i &lt; 5; i++) {\n            System.out.println(\"\u30b9\u30ec\u30c3\u30c9\u5b9f\u884c\u4e2d: \" + i);\n            try {\n                Thread.sleep(1000); \/\/ 1\u79d2\u5f85\u6a5f\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nMyThread thread = new MyThread();\nthread.start(); \/\/ \u30b9\u30ec\u30c3\u30c9\u306e\u958b\u59cb<\/pre>\n\n\n<div id=\"sgb-css-id-60\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#009EF3;color:#FFF\" class=\"sgb-box-simple__title\">\u30e1\u30ea\u30c3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-58\">\n<li>\u76f4\u611f\u7684\u306a\u5b9f\u88c5<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-59\">\n<li>Thread\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/li>\n<\/div>\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u306e\u72b6\u614b\u7ba1\u7406\u304c\u5bb9\u6613<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#f88080;color:#FFF\" class=\"sgb-box-simple__title\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#f88080;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-61\">\n<li>\u7d99\u627f\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u3001\u4ed6\u306e\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3067\u304d\u306a\u3044<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<li>\u30af\u30e9\u30b9\u3068\u30b9\u30ec\u30c3\u30c9\u306e\u5f79\u5272\u304c\u5bc6\u7d50\u5408<\/li>\n<\/div>\n\n\n<li>\u67d4\u8edf\u6027\u306b\u6b20\u3051\u308b<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">2.2 Runnable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u306e\u7279\u5fb4<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-65\">\n<p class=\"wp-block-paragraph\">Runnable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u306f\u3001\u3088\u308a\u67d4\u8edf\u306a\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-66\">\n<h4 class=\"wp-block-heading\" id=\"i-13\">\u5b9f\u88c5\u4f8b<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class MyRunnable implements Runnable {\n    private final String name;\n\n    public MyRunnable(String name) {\n        this.name = name;\n    }\n\n    @Override\n    public void run() {\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u3059\u308b\u51e6\u7406\n        for (int i = 0; i &lt; 5; i++) {\n            System.out.println(name + \": \u51e6\u7406\u5b9f\u884c\u4e2d \" + i);\n            try {\n                Thread.sleep(1000);\n            } catch (InterruptedException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nThread thread1 = new Thread(new MyRunnable(\"Thread-1\"));\nThread thread2 = new Thread(new MyRunnable(\"Thread-2\"));\nthread1.start();\nthread2.start();<\/pre>\n\n\n<div id=\"sgb-css-id-67\">\n<h4 class=\"wp-block-heading\" id=\"i-14\">\u6700\u65b0\u306e\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u7528\u3057\u305f\u7c21\u6f54\u306a\u5b9f\u88c5\nRunnable task = () -&gt; {\n    \/\/ \u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\u3059\u308b\u51e6\u7406\n    System.out.println(\"\u30e9\u30e0\u30c0\u5f0f\u3067\u5b9f\u88c5\u3057\u305f\u30b9\u30ec\u30c3\u30c9\u51e6\u7406\");\n};\nnew Thread(task).start();<\/pre>\n\n\n<div id=\"sgb-css-id-71\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:#009EF3;color:#FFF\" class=\"sgb-box-simple__title\">\u30e1\u30ea\u30c3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-68\">\n<li>\u4ed6\u306e\u30af\u30e9\u30b9\u306e\u7d99\u627f\u304c\u53ef\u80fd<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-69\">\n<li>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u304c\u9ad8\u3044<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-70\">\n<li>\u95a2\u6570\u578b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u3057\u3066\u4f7f\u7528\u53ef\u80fd<\/li>\n<\/div>\n\n\n<li>\u3088\u308a\u758e\u7d50\u5408\u306a\u8a2d\u8a08\u304c\u53ef\u80fd<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">2.3 ExecutorService\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-73\">\n<p class=\"wp-block-paragraph\">ExecutorService\u306f\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u30b9\u30ec\u30c3\u30c9\u7ba1\u7406\u3092\u63d0\u4f9b\u3059\u308b\u73fe\u4ee3\u7684\u306a\u5b9f\u88c5\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<h4 class=\"wp-block-heading\" id=\"i-16\">\u57fa\u672c\u7684\u306a\u4f7f\u7528\u4f8b<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.concurrent.ExecutorService;\nimport java.util.concurrent.Executors;\nimport java.util.concurrent.Future;\n\npublic class ExecutorServiceExample {\n    public static void main(String[] args) {\n        \/\/ \u56fa\u5b9a\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u3092\u4f5c\u6210\n        ExecutorService executor = Executors.newFixedThreadPool(3);\n\n        try {\n            \/\/ \u30bf\u30b9\u30af\u306e\u5b9f\u884c\n            Future&lt;?&gt; future1 = executor.submit(() -&gt; {\n                System.out.println(\"\u30bf\u30b9\u30af1\u5b9f\u884c\u4e2d...\");\n                return \"\u30bf\u30b9\u30af1\u5b8c\u4e86\";\n            });\n\n            Future&lt;?&gt; future2 = executor.submit(() -&gt; {\n                System.out.println(\"\u30bf\u30b9\u30af2\u5b9f\u884c\u4e2d...\");\n                return \"\u30bf\u30b9\u30af2\u5b8c\u4e86\";\n            });\n\n            \/\/ \u7d50\u679c\u306e\u53d6\u5f97\n            System.out.println(future1.get());\n            System.out.println(future2.get());\n\n        } catch (Exception e) {\n            e.printStackTrace();\n        } finally {\n            \/\/ ExecutorService\u306e\u30b7\u30e3\u30c3\u30c8\u30c0\u30a6\u30f3\n            executor.shutdown();\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-75\">\n<h4 class=\"wp-block-heading\" id=\"i-17\">\u7570\u306a\u308b\u30bf\u30a4\u30d7\u306eExecutorService<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u5358\u4e00\u30b9\u30ec\u30c3\u30c9\u306eExecutor\nExecutorService singleExecutor = Executors.newSingleThreadExecutor();\n\n\/\/ 2. \u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\nExecutorService cachedExecutor = Executors.newCachedThreadPool();\n\n\/\/ 3. \u30b9\u30b1\u30b8\u30e5\u30fc\u30eb\u5b9f\u884c\u304c\u53ef\u80fd\u306aExecutor\nScheduledExecutorService scheduledExecutor = Executors.newScheduledThreadPool(4);<\/pre>\n\n\n<div id=\"sgb-css-id-76\">\n<h4 class=\"wp-block-heading\" id=\"i-18\">ExecutorService\u306e\u4e3b\u8981\u306a\u7279\u5fb4<\/h4>\n<\/div>\n\n<div id=\"id-d754914b-d444-462b-9462-f05dda0902a4\"><div id=\"sgb-css-id-77\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7279\u5fb4<\/th><th>\u8aac\u660e<\/th><th>\u4f7f\u7528\u30b1\u30fc\u30b9<\/th><\/tr><\/thead><tbody><tr><td>\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u7ba1\u7406<\/td><td>\u30b9\u30ec\u30c3\u30c9\u306e\u518d\u5229\u7528\u304c\u53ef\u80fd<\/td><td>\u5927\u91cf\u306e\u77ed\u6642\u9593\u30bf\u30b9\u30af<\/td><\/tr><tr><td>\u30bf\u30b9\u30af\u306e\u30b9\u30b1\u30b8\u30e5\u30fc\u30ea\u30f3\u30b0<\/td><td>\u5b9f\u884c\u6642\u9593\u306e\u5236\u5fa1\u304c\u53ef\u80fd<\/td><td>\u5b9a\u671f\u7684\u306a\u30d0\u30c3\u30c1\u51e6\u7406<\/td><\/tr><tr><td>Future\u578b\u3067\u306e\u7d50\u679c\u53d6\u5f97<\/td><td>\u975e\u540c\u671f\u51e6\u7406\u306e\u7d50\u679c\u3092\u7ba1\u7406<\/td><td>\u8a08\u7b97\u51e6\u7406\u306e\u4e26\u5217\u5316<\/td><\/tr><tr><td>\u30b7\u30e3\u30c3\u30c8\u30c0\u30a6\u30f3\u5236\u5fa1<\/td><td>\u30ea\u30bd\u30fc\u30b9\u306e\u9069\u5207\u306a\u89e3\u653e<\/td><td>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u7d42\u4e86\u6642<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-78\">\n<h4 class=\"wp-block-heading\" id=\"i-19\">\u5b9f\u88c5\u6642\u306e\u6ce8\u610f\u70b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-79\">\n<p class=\"wp-block-paragraph\">1. \u9069\u5207\u306a\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u30b5\u30a4\u30ba\u306e\u8a2d\u5b9a<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ CPU\u6570\u306b\u57fa\u3065\u304f\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u30b5\u30a4\u30ba\u306e\u8a2d\u5b9a\nint processors = Runtime.getRuntime().availableProcessors();\nExecutorService executor = Executors.newFixedThreadPool(processors);<\/pre>\n\n\n<div id=\"sgb-css-id-80\">\n<p class=\"wp-block-paragraph\">2. \u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u88c5<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">executor.submit(() -&gt; {\n    try {\n        \/\/ \u30bf\u30b9\u30af\u306e\u51e6\u7406\n    } catch (Exception e) {\n        \/\/ \u4f8b\u5916\u306e\u30ed\u30b0\u8a18\u9332\n        logger.error(\"\u30bf\u30b9\u30af\u5b9f\u884c\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\", e);\n        throw e;\n    }\n});<\/pre>\n\n\n<div id=\"sgb-css-id-81\">\n<p class=\"wp-block-paragraph\">3. \u30b7\u30e3\u30c3\u30c8\u30c0\u30a6\u30f3\u306e\u9069\u5207\u306a\u5b9f\u88c5<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">try {\n    executor.shutdown();\n    if (!executor.awaitTermination(60, TimeUnit.SECONDS)) {\n        executor.shutdownNow();\n    }\n} catch (InterruptedException e) {\n    executor.shutdownNow();\n}<\/pre>\n\n\n<div id=\"sgb-css-id-82\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u5b9f\u88c5\u65b9\u6cd5\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306a\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-83\">\n<h2 class=\"wp-block-heading\" id=\"i-20\">\uff13\uff0e\u30b9\u30ec\u30c3\u30c9\u9593\u306e\u540c\u671f\u51e6\u7406\u3068\u6392\u4ed6\u5236\u5fa1<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\n<h3 class=\"wp-block-heading\" id=\"i-21\">3.1 synchronized\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-85\">\n<p class=\"wp-block-paragraph\">synchronized\u306f\u3001Java\u3067\u6700\u3082\u57fa\u672c\u7684\u306a\u540c\u671f\u6a5f\u69cb\u3067\u3059\u3002\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<h4 class=\"wp-block-heading\" id=\"i-22\">1. \u30e1\u30bd\u30c3\u30c9\u30ec\u30d9\u30eb\u306e\u540c\u671f<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class BankAccount {\n    private int balance;\n\n    \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u540c\u671f\n    public synchronized void deposit(int amount) {\n        balance += amount;\n    }\n\n    \/\/ static\u30e1\u30bd\u30c3\u30c9\u306e\u540c\u671f\n    public static synchronized void transferLog(String message) {\n        System.out.println(\"Transfer: \" + message);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-87\">\n<h4 class=\"wp-block-heading\" id=\"i-23\">2. \u30d6\u30ed\u30c3\u30af\u30ec\u30d9\u30eb\u306e\u540c\u671f<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class InventoryManager {\n    private final List&lt;String&gt; items = new ArrayList&lt;&gt;();\n    private final Object lock = new Object(); \/\/ \u540c\u671f\u7528\u306e\u30ed\u30c3\u30af\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\n\n    public void addItem(String item) {\n        \/\/ \u7279\u5b9a\u306e\u30d6\u30ed\u30c3\u30af\u306e\u307f\u3092\u540c\u671f\n        synchronized (lock) {\n            items.add(item);\n            System.out.println(\"Added: \" + item);\n        }\n        \/\/ \u3053\u306e\u90e8\u5206\u306f\u540c\u671f\u3055\u308c\u306a\u3044\n        processItem(item);\n    }\n\n    private void processItem(String item) {\n        \/\/ \u975e\u540c\u671f\u306e\u51e6\u7406\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-88\">\n<h4 class=\"wp-block-heading\" id=\"i-24\">synchronized\u306e\u4f7f\u7528\u4e0a\u306e\u6ce8\u610f\u70b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\n<p class=\"wp-block-paragraph\">\u3000<strong>1. \u7c92\u5ea6\u306e\u9078\u629e<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-90\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u7d30\u304b\u3059\u304e\u308b\uff1a\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306e\u5897\u52a0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-91\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u7c97\u3059\u304e\u308b\uff1a\u4e26\u884c\u6027\u306e\u4f4e\u4e0b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<p class=\"wp-block-paragraph\">\u3000<strong>2. \u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u9632\u6b62<\/strong><\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   \/\/ \u4e0d\u9069\u5207\u306a\u5b9f\u88c5\uff08\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u5371\u967a\uff09\n   public void transfer(BankAccount to, int amount) {\n       synchronized (this) {\n           synchronized (to) {\n               \/\/ \u8ee2\u9001\u51e6\u7406\n           }\n       }\n   }\n\n   \/\/ \u6539\u5584\u3055\u308c\u305f\u5b9f\u88c5\n   public void transfer(BankAccount to, int amount) {\n       \/\/ \u53e3\u5ea7\u756a\u53f7\u3067\u30ed\u30c3\u30af\u306e\u9806\u5e8f\u3092\u56fa\u5b9a\n       BankAccount first = this.accountNumber &lt; to.accountNumber ? this : to;\n       BankAccount second = this.accountNumber &lt; to.accountNumber ? to : this;\n\n       synchronized (first) {\n           synchronized (second) {\n               \/\/ \u8ee2\u9001\u51e6\u7406\n           }\n       }\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-93\">\n<h3 class=\"wp-block-heading\" id=\"i-25\">3.2 \u30ed\u30c3\u30af\u6a5f\u69cb\u306e\u7a2e\u985e\u3068\u4f7f\u3044\u5206\u3051<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\n<p class=\"wp-block-paragraph\">Java SE 5\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f<code>java.util.concurrent.locks<\/code>\u30d1\u30c3\u30b1\u30fc\u30b8\u306f\u3001\u3088\u308a\u67d4\u8edf\u306a\u30ed\u30c3\u30af\u6a5f\u69cb\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<h4 class=\"wp-block-heading\" id=\"i-26\">1. ReentrantLock<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.concurrent.locks.ReentrantLock;\n\npublic class BankAccountWithLock {\n    private final ReentrantLock lock = new ReentrantLock();\n    private int balance;\n\n    public void deposit(int amount) {\n        lock.lock();  \/\/ \u30ed\u30c3\u30af\u306e\u53d6\u5f97\n        try {\n            balance += amount;\n        } finally {\n            lock.unlock();  \/\/ \u5fc5\u305a\u89e3\u653e\n        }\n    }\n\n    public boolean tryTransfer(BankAccount to, int amount, long timeout) {\n        \/\/ \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u4ed8\u304d\u306e\u30ed\u30c3\u30af\u53d6\u5f97\n        try {\n            if (lock.tryLock(timeout, TimeUnit.MILLISECONDS)) {\n                try {\n                    if (balance &gt;= amount) {\n                        balance -= amount;\n                        to.deposit(amount);\n                        return true;\n                    }\n                } finally {\n                    lock.unlock();\n                }\n            }\n        } catch (InterruptedException e) {\n            Thread.currentThread().interrupt();\n        }\n        return false;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-96\">\n<h4 class=\"wp-block-heading\" id=\"i-27\">2. ReadWriteLock<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.concurrent.locks.ReadWriteLock;\nimport java.util.concurrent.locks.ReentrantReadWriteLock;\n\npublic class CacheManager {\n    private final ReadWriteLock lock = new ReentrantReadWriteLock();\n    private final Map&lt;String, String&gt; cache = new HashMap&lt;&gt;();\n\n    public String getData(String key) {\n        lock.readLock().lock();  \/\/ \u8aad\u307f\u53d6\u308a\u30ed\u30c3\u30af\n        try {\n            return cache.get(key);\n        } finally {\n            lock.readLock().unlock();\n        }\n    }\n\n    public void putData(String key, String value) {\n        lock.writeLock().lock();  \/\/ \u66f8\u304d\u8fbc\u307f\u30ed\u30c3\u30af\n        try {\n            cache.put(key, value);\n        } finally {\n            lock.writeLock().unlock();\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-97\">\n<h3 class=\"wp-block-heading\" id=\"i-28\">3.3 \u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u9632\u3050\u305f\u3081\u306e3\u3064\u306e\u539f\u5247<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<h4 class=\"wp-block-heading\" id=\"i-29\">1. \u30ed\u30c3\u30af\u306e\u9806\u5e8f\u4ed8\u3051<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ResourceManager {\n    private static final Object LOCK_1 = new Object();\n    private static final Object LOCK_2 = new Object();\n\n    public void process() {\n        \/\/ \u5e38\u306b\u540c\u3058\u9806\u5e8f\u3067\u30ed\u30c3\u30af\u3092\u53d6\u5f97\n        synchronized (LOCK_1) {\n            synchronized (LOCK_2) {\n                \/\/ \u51e6\u7406\n            }\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-99\">\n<h4 class=\"wp-block-heading\" id=\"i-30\">2. \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306e\u4f7f\u7528<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class TimeoutExample {\n    private final Lock lock = new ReentrantLock();\n\n    public void processWithTimeout() {\n        try {\n            \/\/ \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u4ed8\u304d\u3067\u30ed\u30c3\u30af\u53d6\u5f97\u3092\u8a66\u307f\u308b\n            if (lock.tryLock(1000, TimeUnit.MILLISECONDS)) {\n                try {\n                    \/\/ \u51e6\u7406\n                } finally {\n                    lock.unlock();\n                }\n            } else {\n                \/\/ \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u6642\u306e\u51e6\u7406\n                System.out.println(\"\u30ed\u30c3\u30af\u53d6\u5f97\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u307e\u3057\u305f\");\n            }\n        } catch (InterruptedException e) {\n            Thread.currentThread().interrupt();\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-100\">\n<h4 class=\"wp-block-heading\" id=\"i-31\">3. \u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u691c\u51fa\u3068\u56de\u5fa9<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class DeadlockDetector {\n    public static void detectDeadlock() {\n        ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();\n        long[] threadIds = threadBean.findDeadlockedThreads();\n\n        if (threadIds != null) {\n            ThreadInfo[] threadInfos = threadBean.getThreadInfo(threadIds);\n            System.out.println(\"\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u3092\u691c\u51fa:\");\n            for (ThreadInfo info : threadInfos) {\n                System.out.println(info.getThreadName() + \" - \" + \n                    info.getLockName() + \" \u5f85\u3061\");\n            }\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-101\">\n<h4 class=\"wp-block-heading\" id=\"i-32\">\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u9632\u6b62\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u8868<\/h4>\n<\/div>\n\n<div id=\"id-f3e78c49-ea46-4b53-a16c-73c2fe6853e6\"><div id=\"sgb-css-id-102\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u539f\u5247<\/th><th>\u5b9f\u88c5\u65b9\u6cd5<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u30c7\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>\u30ed\u30c3\u30af\u306e\u9806\u5e8f\u4ed8\u3051<\/td><td>\u4e00\u8cab\u3057\u305f\u9806\u5e8f\u3067\u30ed\u30c3\u30af\u53d6\u5f97<\/td><td>\u30b7\u30f3\u30d7\u30eb\u3067\u78ba\u5b9f<\/td><td>\u8a2d\u8a08\u6642\u306e\u8003\u616e\u304c\u5fc5\u8981<\/td><\/tr><tr><td>\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u8a2d\u5b9a<\/td><td>tryLock\u306e\u4f7f\u7528<\/td><td>\u56de\u5fa9\u53ef\u80fd<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30b3\u30b9\u30c8<\/td><\/tr><tr><td>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u691c\u51fa<\/td><td>ThreadMXBean\u306e\u4f7f\u7528<\/td><td>\u554f\u984c\u306e\u65e9\u671f\u767a\u898b<\/td><td>\u5b9f\u884c\u6642\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-103\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u540c\u671f\u51e6\u7406\u3068\u6392\u4ed6\u5236\u5fa1\u306e\u4ed5\u7d44\u307f\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u306a\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-104\">\n<h2 class=\"wp-block-heading\" id=\"i-33\">\uff14\uff0eJava 8\u4ee5\u964d\u306e\u6700\u65b0\u4e26\u884c\u51e6\u7406API\u6d3b\u7528\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<h3 class=\"wp-block-heading\" id=\"i-34\">4.1 CompletableFuture\u3067\u975e\u540c\u671f\u51e6\u7406\u3092\u7c21\u6f54\u306b\u66f8\u304f<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-106\">\n<p class=\"wp-block-paragraph\">CompletableFuture\u306f\u3001Java 8\u3067\u5c0e\u5165\u3055\u308c\u305f\u975e\u540c\u671f\u51e6\u7406\u306e\u305f\u3081\u306e\u5f37\u529b\u306aAPI\u3067\u3059\u3002\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u3084\u4f8b\u5916\u51e6\u7406\u3092\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-107\">\n<h4 class=\"wp-block-heading\" id=\"i-35\">\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.concurrent.CompletableFuture;\n\npublic class CompletableFutureExample {\n    public CompletableFuture&lt;String&gt; fetchUserData(String userId) {\n        return CompletableFuture.supplyAsync(() -&gt; {\n            \/\/ \u975e\u540c\u671f\u3067\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\n            return \"User:\" + userId;\n        }).thenApply(userData -&gt; {\n            \/\/ \u30c7\u30fc\u30bf\u306e\u52a0\u5de5\n            return userData + \" (processed)\";\n        }).exceptionally(throwable -&gt; {\n            \/\/ \u4f8b\u5916\u51e6\u7406\n            System.err.println(\"Error: \" + throwable.getMessage());\n            return \"Default User Data\";\n        });\n    }\n\n    \/\/ \u8907\u6570\u306e\u975e\u540c\u671f\u51e6\u7406\u306e\u7d44\u307f\u5408\u308f\u305b\n    public void processMultipleUsers() {\n        CompletableFuture&lt;String&gt; user1 = fetchUserData(\"1\");\n        CompletableFuture&lt;String&gt; user2 = fetchUserData(\"2\");\n\n        CompletableFuture.allOf(user1, user2)\n            .thenRun(() -&gt; {\n                System.out.println(\"All users processed\");\n            });\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-108\">\n<h4 class=\"wp-block-heading\" id=\"i-36\">\u9ad8\u5ea6\u306a\u4f7f\u7528\u4f8b<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class AdvancedCompletableFuture {\n    public void demonstrateAdvancedFeatures() {\n        CompletableFuture&lt;String&gt; future1 = CompletableFuture\n            .supplyAsync(() -&gt; \"Price:\")\n            .thenCombine(\n                CompletableFuture.supplyAsync(() -&gt; 100.0),\n                (str, price) -&gt; str + price\n            );\n\n        \/\/ \u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u51e6\u7406\u306e\u8ffd\u52a0\n        try {\n            String result = future1\n                .completeOnTimeout(\"Price:0.0\", 1, TimeUnit.SECONDS)\n                .get();\n            System.out.println(result);\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n\n    \/\/ \u975e\u540c\u671f\u51e6\u7406\u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\n    public CompletableFuture&lt;String&gt; robustAsyncOperation() {\n        return CompletableFuture\n            .supplyAsync(() -&gt; {\n                if (Math.random() &lt; 0.5) {\n                    throw new RuntimeException(\"Random failure\");\n                }\n                return \"Success\";\n            })\n            .handle((result, ex) -&gt; {\n                if (ex != null) {\n                    return \"Error handled: \" + ex.getMessage();\n                }\n                return result;\n            });\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-109\">\n<h3 class=\"wp-block-heading\" id=\"i-37\">4.2 \u4e26\u5217\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u4f7f\u7528\u3057\u305f\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u6700\u9069\u5316<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<p class=\"wp-block-paragraph\">Java 8\u306eStream API\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u4e26\u5217\u51e6\u7406\u304c\u7c21\u5358\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<h4 class=\"wp-block-heading\" id=\"i-38\">\u57fa\u672c\u7684\u306a\u4e26\u5217\u51e6\u7406<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.List;\nimport java.util.stream.Collectors;\n\npublic class ParallelStreamExample {\n    public List&lt;Integer&gt; processNumbers(List&lt;Integer&gt; numbers) {\n        return numbers.parallelStream()\n            .filter(n -&gt; n &gt; 0)           \/\/ \u6b63\u306e\u6570\u3092\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\n            .map(n -&gt; n * 2)              \/\/ \u5404\u6570\u30922\u500d\n            .sorted()                      \/\/ \u30bd\u30fc\u30c8\n            .collect(Collectors.toList()); \/\/ \u30ea\u30b9\u30c8\u306b\u53ce\u96c6\n    }\n\n    \/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u4f8b\n    public double calculateAverage(List&lt;Double&gt; values) {\n        return values.parallelStream()\n            .filter(v -&gt; v != null)\n            .mapToDouble(Double::doubleValue)\n            .average()\n            .orElse(0.0);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-112\">\n<h4 class=\"wp-block-heading\" id=\"i-39\">\u4e26\u5217\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ParallelStreamBestPractices {\n    \/\/ \u9069\u5207\u306a\u30b9\u30ec\u30c3\u30c9\u6570\u306e\u8a2d\u5b9a\n    static {\n        \/\/ \u5229\u7528\u53ef\u80fd\u306a\u30d7\u30ed\u30bb\u30c3\u30b5\u6570\u306b\u57fa\u3065\u3044\u3066\u30d1\u30e9\u30ec\u30ea\u30ba\u30e0\u3092\u8a2d\u5b9a\n        System.setProperty(\n            \"java.util.concurrent.ForkJoinPool.common.parallelism\",\n            String.valueOf(Runtime.getRuntime().availableProcessors())\n        );\n    }\n\n    \/\/ \u5927\u898f\u6a21\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306e\u51e6\u7406\n    public void processLargeDataSet(List&lt;String&gt; data) {\n        data.parallelStream()\n            .filter(str -&gt; str != null &amp;&amp; !str.isEmpty())\n            .map(String::toUpperCase)\n            .forEach(str -&gt; {\n                \/\/ \u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3057\u3066\u51e6\u7406\n                processBatch(str);\n            });\n    }\n\n    private void processBatch(String data) {\n        \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u306e\u5b9f\u88c5\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-113\">\n<h3 class=\"wp-block-heading\" id=\"i-40\">4.3 ForkJoinPool\u3092\u4f7f\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u30bf\u30b9\u30af\u5206\u5272<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<p class=\"wp-block-paragraph\">ForkJoinPool\u306f\u3001\u5927\u898f\u6a21\u306a\u30bf\u30b9\u30af\u3092\u5c0f\u3055\u306a\u30b5\u30d6\u30bf\u30b9\u30af\u306b\u5206\u5272\u3057\u3066\u4e26\u5217\u51e6\u7406\u3092\u884c\u3046\u305f\u3081\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-115\">\n<h4 class=\"wp-block-heading\" id=\"i-41\">\u518d\u5e30\u7684\u306a\u30bf\u30b9\u30af\u5206\u5272\u306e\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.concurrent.RecursiveTask;\nimport java.util.concurrent.ForkJoinPool;\n\npublic class ArraySumCalculator extends RecursiveTask&lt;Long&gt; {\n    private static final int THRESHOLD = 1000;\n    private final int[] array;\n    private final int start;\n    private final int end;\n\n    public ArraySumCalculator(int[] array, int start, int end) {\n        this.array = array;\n        this.start = start;\n        this.end = end;\n    }\n\n    @Override\n    protected Long compute() {\n        if (end - start &lt;= THRESHOLD) {\n            \/\/ \u95be\u5024\u4ee5\u4e0b\u306a\u3089\u76f4\u63a5\u8a08\u7b97\n            return computeDirectly();\n        }\n\n        \/\/ \u30bf\u30b9\u30af\u3092\u5206\u5272\u3057\u3066\u4e26\u5217\u51e6\u7406\n        int middle = start + (end - start) \/ 2;\n        ArraySumCalculator leftTask = \n            new ArraySumCalculator(array, start, middle);\n        ArraySumCalculator rightTask = \n            new ArraySumCalculator(array, middle, end);\n\n        leftTask.fork(); \/\/ \u5de6\u534a\u5206\u3092\u5225\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\n        Long rightResult = rightTask.compute(); \/\/ \u53f3\u534a\u5206\u3092\u73fe\u5728\u306e\u30b9\u30ec\u30c3\u30c9\u3067\u5b9f\u884c\n        Long leftResult = leftTask.join(); \/\/ \u5de6\u534a\u5206\u306e\u7d50\u679c\u3092\u5f85\u6a5f\n\n        return leftResult + rightResult;\n    }\n\n    private long computeDirectly() {\n        long sum = 0;\n        for (int i = start; i &lt; end; i++) {\n            sum += array[i];\n        }\n        return sum;\n    }\n\n    \/\/ \u4f7f\u7528\u4f8b\n    public static void main(String[] args) {\n        int[] array = new int[100000];\n        \/\/ \u914d\u5217\u306e\u521d\u671f\u5316\n        for (int i = 0; i &lt; array.length; i++) {\n            array[i] = i;\n        }\n\n        ForkJoinPool pool = new ForkJoinPool();\n        ArraySumCalculator calculator = \n            new ArraySumCalculator(array, 0, array.length);\n        long sum = pool.invoke(calculator);\n        System.out.println(\"Sum: \" + sum);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-116\">\n<h4 class=\"wp-block-heading\" id=\"i-42\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8<\/h4>\n<\/div>\n\n<div id=\"id-47e83343-a5ad-443e-9765-907e263a0ff6\"><div id=\"sgb-css-id-117\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u6700\u9069\u5316\u9805\u76ee<\/th><th>\u8aac\u660e<\/th><th>\u63a8\u5968\u8a2d\u5b9a<\/th><\/tr><\/thead><tbody><tr><td>\u30bf\u30b9\u30af\u30b5\u30a4\u30ba<\/td><td>\u5206\u5272\u3059\u308b\u6700\u5c0f\u5358\u4f4d<\/td><td>1000\u301c10000\u8981\u7d20<\/td><\/tr><tr><td>\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u30b5\u30a4\u30ba<\/td><td>\u540c\u6642\u5b9f\u884c\u30b9\u30ec\u30c3\u30c9\u6570<\/td><td>CPU\u8ad6\u7406\u30b3\u30a2\u6570<\/td><\/tr><tr><td>\u5206\u5272\u6226\u7565<\/td><td>\u30bf\u30b9\u30af\u306e\u5206\u5272\u65b9\u6cd5<\/td><td>\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u306b\u5fdc\u3058\u3066\u8abf\u6574<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-118\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u6700\u65b0API\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u4e26\u884c\u51e6\u7406\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-119\">\n<h2 class=\"wp-block-heading\" id=\"i-43\">\uff15\uff0e\u73fe\u5834\u3067\u4f7f\u3048\u308b\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-120\">\n<h3 class=\"wp-block-heading\" id=\"i-44\">5.1 \u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u30b5\u30a4\u30ba\u8a2d\u8a08\u6307\u91dd<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-121\">\n<p class=\"wp-block-paragraph\">\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u9069\u5207\u306a\u30b5\u30a4\u30ba\u8a2d\u8a08\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u76f4\u63a5\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-122\">\n<h4 class=\"wp-block-heading\" id=\"i-45\">\u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u30b5\u30a4\u30ba\u306e\u8a08\u7b97\u5f0f<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.concurrent.ExecutorService;\nimport java.util.concurrent.Executors;\n\npublic class ThreadPoolSizeCalculator {\n    public static int calculateOptimalThreads(float targetCpuUtilization,\n                                           float cpuRatio) {\n        int cpuCount = Runtime.getRuntime().availableProcessors();\n\n        \/\/ \u30b9\u30ec\u30c3\u30c9\u6570 = CPU\u6570 * CPU\u4f7f\u7528\u7387 * (1 + \u5f85\u6a5f\u6642\u9593\/CPU\u6642\u9593)\n        int optimal = (int)(cpuCount * targetCpuUtilization * (1 + cpuRatio));\n        return Math.max(optimal, 1); \/\/ \u6700\u4f4e1\u30b9\u30ec\u30c3\u30c9\n    }\n\n    \/\/ \u5b9f\u88c5\u4f8b\n    public static ExecutorService createOptimalThreadPool() {\n        int threadCount = calculateOptimalThreads(0.8f, 0.5f);\n        return Executors.newFixedThreadPool(threadCount);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-123\">\n<h4 class=\"wp-block-heading\" id=\"i-46\">\u30bf\u30b9\u30af\u306e\u7a2e\u985e\u5225\u63a8\u5968\u8a2d\u5b9a<\/h4>\n<\/div>\n\n<div id=\"id-5388815f-867a-4891-837d-8a2248bae4df\"><div id=\"sgb-css-id-124\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30bf\u30b9\u30af\u7a2e\u5225<\/th><th>\u30b9\u30ec\u30c3\u30c9\u6570\u8a08\u7b97\u5f0f<\/th><th>\u5099\u8003<\/th><\/tr><\/thead><tbody><tr><td>CPU\u96c6\u4e2d\u578b<\/td><td>CPU\u6570 + 1<\/td><td>\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u30b9\u30a4\u30c3\u30c1\u3092\u6700\u5c0f\u5316<\/td><\/tr><tr><td>I\/O\u96c6\u4e2d\u578b<\/td><td>CPU\u6570 * 2<\/td><td>I\/O\u5f85\u3061\u6642\u9593\u3092\u8003\u616e<\/td><\/tr><tr><td>\u6df7\u5408\u578b<\/td><td>CPU\u6570 * (1 + \u5f85\u6a5f\u7387)<\/td><td>\u5f85\u6a5f\u7387\u306b\u5fdc\u3058\u3066\u8abf\u6574<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-125\">\n<h3 class=\"wp-block-heading\" id=\"i-47\">5.2 \u4f8b\u5916\u51e6\u7406\u306e\u6b63\u3057\u3044\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-126\">\n<p class=\"wp-block-paragraph\">\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u306e\u4f8b\u5916\u51e6\u7406\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b89\u5b9a\u6027\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-127\">\n<h4 class=\"wp-block-heading\" id=\"i-48\">\u30b0\u30ed\u30fc\u30d0\u30eb\u4f8b\u5916\u30cf\u30f3\u30c9\u30e9\u306e\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ThreadExceptionHandler {\n    public static class GlobalExceptionHandler implements Thread.UncaughtExceptionHandler {\n        @Override\n        public void uncaughtException(Thread t, Throwable e) {\n            System.err.println(\"Thread \" + t.getName() + \" threw exception: \" + e.getMessage());\n            \/\/ \u30ed\u30b0\u8a18\u9332\u3084\u30e1\u30c8\u30ea\u30af\u30b9\u53ce\u96c6\n            logException(e);\n        }\n\n        private void logException(Throwable e) {\n            \/\/ \u30ed\u30b0\u8a18\u9332\u306e\u5b9f\u88c5\n        }\n    }\n\n    \/\/ ExecutorService\u3067\u306e\u4f8b\u5916\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\n    public static ExecutorService createExecutorWithExceptionHandler(int threadCount) {\n        ThreadFactory factory = new ThreadFactory() {\n            @Override\n            public Thread newThread(Runnable r) {\n                Thread thread = new Thread(r);\n                thread.setUncaughtExceptionHandler(new GlobalExceptionHandler());\n                return thread;\n            }\n        };\n\n        return Executors.newFixedThreadPool(threadCount, factory);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-128\">\n<h4 class=\"wp-block-heading\" id=\"i-49\">Future\u4f7f\u7528\u6642\u306e\u4f8b\u5916\u51e6\u7406<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class FutureExceptionHandler {\n    private final ExecutorService executor;\n\n    public FutureExceptionHandler(int threadCount) {\n        this.executor = Executors.newFixedThreadPool(threadCount);\n    }\n\n    public void executeWithExceptionHandling(Runnable task) {\n        Future&lt;?&gt; future = executor.submit(task);\n        try {\n            future.get(); \/\/ \u5b8c\u4e86\u3092\u5f85\u6a5f\n        } catch (InterruptedException e) {\n            Thread.currentThread().interrupt();\n        } catch (ExecutionException e) {\n            handleExecutionException(e.getCause());\n        }\n    }\n\n    private void handleExecutionException(Throwable cause) {\n        \/\/ \u4f8b\u5916\u306e\u7a2e\u985e\u306b\u5fdc\u3058\u305f\u51e6\u7406\n        if (cause instanceof BusinessException) {\n            \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u4f8b\u5916\u306e\u51e6\u7406\n        } else if (cause instanceof SystemException) {\n            \/\/ \u30b7\u30b9\u30c6\u30e0\u4f8b\u5916\u306e\u51e6\u7406\n        } else {\n            \/\/ \u4e88\u671f\u305b\u306c\u4f8b\u5916\u306e\u51e6\u7406\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-129\">\n<h3 class=\"wp-block-heading\" id=\"i-50\">5.3 \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u5b9f\u88c5\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<p class=\"wp-block-paragraph\">\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u5b9f\u88c5\u306f\u3001\u4e26\u884c\u51e6\u7406\u74b0\u5883\u3067\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-131\">\n<h4 class=\"wp-block-heading\" id=\"i-51\">\u69d8\u3005\u306a\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ 1. \u9045\u5ef6\u521d\u671f\u5316\u306e\u30c0\u30d6\u30eb\u30c1\u30a7\u30c3\u30af\u30ed\u30c3\u30ad\u30f3\u30b0\npublic class DoubleCheckedSingleton {\n    private static volatile DoubleCheckedSingleton instance;\n\n    private DoubleCheckedSingleton() {}\n\n    public static DoubleCheckedSingleton getInstance() {\n        if (instance == null) {\n            synchronized (DoubleCheckedSingleton.class) {\n                if (instance == null) {\n                    instance = new DoubleCheckedSingleton();\n                }\n            }\n        }\n        return instance;\n    }\n}\n\n\/\/ 2. \u521d\u671f\u5316\u30db\u30eb\u30c0\u30fc\u30a4\u30c7\u30a3\u30aa\u30e0\npublic class HolderSingleton {\n    private HolderSingleton() {}\n\n    private static class Holder {\n        private static final HolderSingleton INSTANCE = new HolderSingleton();\n    }\n\n    public static HolderSingleton getInstance() {\n        return Holder.INSTANCE;\n    }\n}\n\n\/\/ 3. enum\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\npublic enum EnumSingleton {\n    INSTANCE;\n\n    private final ConnectionPool connectionPool;\n\n    EnumSingleton() {\n        connectionPool = new ConnectionPool();\n    }\n\n    public ConnectionPool getConnectionPool() {\n        return connectionPool;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-132\">\n<h4 class=\"wp-block-heading\" id=\"i-52\">\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u5225\u6bd4\u8f03<\/h4>\n<\/div>\n\n<div id=\"id-10670a82-ddeb-4676-ab5a-07a728f7519f\"><div id=\"sgb-css-id-133\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u30c7\u30e1\u30ea\u30c3\u30c8<\/th><th>\u4f7f\u7528\u30b1\u30fc\u30b9<\/th><\/tr><\/thead><tbody><tr><td>\u30c0\u30d6\u30eb\u30c1\u30a7\u30c3\u30af<\/td><td>\u9045\u5ef6\u521d\u671f\u5316\u53ef\u80fd<\/td><td>\u3084\u3084\u8907\u96d1<\/td><td>\u30ea\u30bd\u30fc\u30b9\u7bc0\u7d04\u91cd\u8996<\/td><\/tr><tr><td>\u521d\u671f\u5316\u30db\u30eb\u30c0\u30fc<\/td><td>\u30b7\u30f3\u30d7\u30eb\u3001\u5b89\u5168<\/td><td>\u5373\u6642\u521d\u671f\u5316<\/td><td>\u6a19\u6e96\u7684\u306a\u7528\u9014<\/td><\/tr><tr><td>enum<\/td><td>\u6700\u3082\u30b7\u30f3\u30d7\u30eb<\/td><td>\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u5236\u9650<\/td><td>\u30b7\u30f3\u30d7\u30eb\u306a\u7528\u9014<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-134\">\n<h4 class=\"wp-block-heading\" id=\"i-53\">\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-135\">\n<p class=\"wp-block-paragraph\">\u3000<strong>1. \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u8a2d\u8a08<\/strong><\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public final class ImmutableConfig {\n    private final String serverUrl;\n    private final int maxConnections;\n\n    public ImmutableConfig(String serverUrl, int maxConnections) {\n        this.serverUrl = serverUrl;\n        this.maxConnections = maxConnections;\n    }\n\n    \/\/ getter\u306e\u307f\u63d0\u4f9b\uff08setter\u306a\u3057\uff09\n    public String getServerUrl() {\n        return serverUrl;\n    }\n\n    public int getMaxConnections() {\n        return maxConnections;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-136\">\n<p class=\"wp-block-paragraph\">\u3000<strong>2. \u30a2\u30c8\u30df\u30c3\u30af\u306a\u64cd\u4f5c<\/strong><\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class AtomicCounter {\n    private final AtomicInteger counter = new AtomicInteger(0);\n\n    public int increment() {\n        return counter.incrementAndGet();\n    }\n\n    public int getCount() {\n        return counter.get();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-137\">\n<p class=\"wp-block-paragraph\">\u3000<strong>3. \u9069\u5207\u306a\u30ed\u30c3\u30af\u7bc4\u56f2<\/strong><\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class OptimizedLocking {\n    private final Lock lock = new ReentrantLock();\n    private final Map&lt;String, Object&gt; cache = new HashMap&lt;&gt;();\n\n    public Object getFromCache(String key) {\n        \/\/ \u8aad\u307f\u53d6\u308a\u64cd\u4f5c\u306f\u30ed\u30c3\u30af\u4e0d\u8981\n        Object value = cache.get(key);\n        if (value != null) {\n            return value;\n        }\n\n        \/\/ \u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u30ed\u30c3\u30af\n        lock.lock();\n        try {\n            value = cache.get(key);\n            if (value == null) {\n                value = computeValue(key);\n                cache.put(key, value);\n            }\n            return value;\n        } finally {\n            lock.unlock();\n        }\n    }\n\n    private Object computeValue(String key) {\n        \/\/ \u5024\u306e\u8a08\u7b97\u30ed\u30b8\u30c3\u30af\n        return \"computed-\" + key;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-138\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u5207\u306b\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5168\u3067\u52b9\u7387\u7684\u306a\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<h2 class=\"wp-block-heading\" id=\"i-54\">\uff16\uff0e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-140\">\n<h3 class=\"wp-block-heading\" id=\"i-55\">6.1 \u7af6\u5408\u72b6\u614b\u306e\u7279\u5b9a\u3068\u89e3\u6c7a\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<p class=\"wp-block-paragraph\">\u7af6\u5408\u72b6\u614b\uff08Race Condition\uff09\u306f\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u554f\u984c\u306e1\u3064\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-142\">\n<h4 class=\"wp-block-heading\" id=\"i-56\">\u7af6\u5408\u72b6\u614b\u306e\u691c\u51fa\u65b9\u6cd5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class RaceConditionDetection {\n    \/\/ \u7af6\u5408\u72b6\u614b\u304c\u767a\u751f\u3057\u3084\u3059\u3044\u5b9f\u88c5\u4f8b\n    public class UnsafeCounter {\n        private int count = 0;\n\n        public void increment() {\n            count++; \/\/ \u975e\u30a2\u30c8\u30df\u30c3\u30af\u64cd\u4f5c\n        }\n\n        public int getCount() {\n            return count;\n        }\n    }\n\n    \/\/ \u7af6\u5408\u72b6\u614b\u3092\u4fee\u6b63\u3057\u305f\u5b9f\u88c5\n    public class SafeCounter {\n        private final AtomicInteger count = new AtomicInteger(0);\n\n        public void increment() {\n            count.incrementAndGet();\n        }\n\n        public int getCount() {\n            return count.get();\n        }\n    }\n\n    \/\/ \u7af6\u5408\u72b6\u614b\u306e\u30c6\u30b9\u30c8\n    public void testRaceCondition() {\n        final int THREAD_COUNT = 100;\n        final int ITERATIONS = 1000;\n\n        ExecutorService executor = Executors.newFixedThreadPool(THREAD_COUNT);\n        UnsafeCounter unsafeCounter = new UnsafeCounter();\n        SafeCounter safeCounter = new SafeCounter();\n\n        \/\/ \u975e\u5b89\u5168\u306a\u5b9f\u88c5\u306e\u30c6\u30b9\u30c8\n        for (int i = 0; i &lt; THREAD_COUNT; i++) {\n            executor.submit(() -&gt; {\n                for (int j = 0; j &lt; ITERATIONS; j++) {\n                    unsafeCounter.increment();\n                }\n            });\n        }\n\n        \/\/ \u5b89\u5168\u306a\u5b9f\u88c5\u306e\u30c6\u30b9\u30c8\n        for (int i = 0; i &lt; THREAD_COUNT; i++) {\n            executor.submit(() -&gt; {\n                for (int j = 0; j &lt; ITERATIONS; j++) {\n                    safeCounter.increment();\n                }\n            });\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-143\">\n<h4 class=\"wp-block-heading\" id=\"i-57\">jcstress\u3092\u4f7f\u7528\u3057\u305f\u7af6\u5408\u72b6\u614b\u306e\u30c6\u30b9\u30c8<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@JCStressTest\n@Outcome(id = \"1, 2\", expect = Expect.ACCEPTABLE)\n@Outcome(id = \"2, 1\", expect = Expect.ACCEPTABLE)\n@Outcome(id = \"1, 1\", expect = Expect.FORBIDDEN)\n@State\npublic class ConcurrencyTest {\n    private int x;\n    private int y;\n\n    @Actor\n    public void actor1() {\n        x = 1;\n        y = 2;\n    }\n\n    @Actor\n    public void actor2() {\n        x = 2;\n        y = 1;\n    }\n\n    @Arbiter\n    public void arbiter(II_Result r) {\n        r.r1 = x;\n        r.r2 = y;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-144\">\n<h3 class=\"wp-block-heading\" id=\"i-58\">6.2 \u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u8aad\u307f\u65b9\u3068\u6d3b\u7528\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<p class=\"wp-block-paragraph\">\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5b9f\u884c\u72b6\u614b\u3092\u7406\u89e3\u3059\u308b\u91cd\u8981\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\n<h4 class=\"wp-block-heading\" id=\"i-59\">\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u53d6\u5f97\u3068\u89e3\u6790<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ThreadDumpAnalyzer {\n    public static void generateThreadDump() {\n        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();\n        ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true);\n\n        for (ThreadInfo info : threadInfos) {\n            System.out.println(formatThreadInfo(info));\n        }\n    }\n\n    private static String formatThreadInfo(ThreadInfo info) {\n        StringBuilder sb = new StringBuilder();\n        sb.append(\"\\\"\").append(info.getThreadName()).append(\"\\\"\");\n        sb.append(\" Id=\").append(info.getThreadId());\n        sb.append(\" \").append(info.getThreadState());\n\n        if (info.getLockName() != null) {\n            sb.append(\" on \").append(info.getLockName());\n        }\n        if (info.getLockOwnerName() != null) {\n            sb.append(\" owned by \\\"\").append(info.getLockOwnerName())\n              .append(\"\\\" Id=\").append(info.getLockOwnerId());\n        }\n\n        StackTraceElement[] stackTrace = info.getStackTrace();\n        for (StackTraceElement element : stackTrace) {\n            sb.append(\"\\n\\tat \").append(element);\n        }\n\n        return sb.toString();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-147\">\n<h4 class=\"wp-block-heading\" id=\"i-60\">\u30b9\u30ec\u30c3\u30c9\u30c0\u30f3\u30d7\u306e\u5206\u6790\u30dd\u30a4\u30f3\u30c8<\/h4>\n<\/div>\n\n<div id=\"id-4785dbee-5e5c-4d0b-93af-847b1299fe85\"><div id=\"sgb-css-id-148\">\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u72b6\u614b<\/th><th>\u8aac\u660e<\/th><th>\u5bfe\u51e6\u65b9\u6cd5<\/th><\/tr><\/thead><tbody><tr><td>BLOCKED<\/td><td>\u30ed\u30c3\u30af\u5f85\u3061<\/td><td>\u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u53ef\u80fd\u6027\u3092\u78ba\u8a8d<\/td><\/tr><tr><td>WAITING<\/td><td>\u7121\u671f\u9650\u5f85\u6a5f<\/td><td>\u5f85\u6a5f\u6761\u4ef6\u306e\u59a5\u5f53\u6027\u78ba\u8a8d<\/td><\/tr><tr><td>TIMED_WAITING<\/td><td>\u6642\u9593\u5236\u9650\u4ed8\u304d\u5f85\u6a5f<\/td><td>\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u8a2d\u5b9a\u306e\u898b\u76f4\u3057<\/td><\/tr><tr><td>RUNNABLE<\/td><td>\u5b9f\u884c\u4e2d<\/td><td>CPU\u4f7f\u7528\u7387\u306e\u78ba\u8a8d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n<div id=\"sgb-css-id-149\">\n<h3 class=\"wp-block-heading\" id=\"i-61\">6.3 \u6027\u80fd\u6e2c\u5b9a\u3068\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u7279\u5b9a\u306e\u624b\u9806<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-150\">\n<h4 class=\"wp-block-heading\" id=\"i-62\">JMH\u3092\u4f7f\u7528\u3057\u305f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6e2c\u5b9a<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">@State(Scope.Thread)\n@BenchmarkMode(Mode.AverageTime)\n@OutputTimeUnit(TimeUnit.MICROSECONDS)\npublic class ConcurrencyBenchmark {\n    private ExecutorService executor;\n    private final int TASK_COUNT = 1000;\n\n    @Setup\n    public void setup() {\n        executor = Executors.newFixedThreadPool(\n            Runtime.getRuntime().availableProcessors()\n        );\n    }\n\n    @Benchmark\n    public void measureParallelExecution() {\n        List&lt;CompletableFuture&lt;Void&gt;&gt; futures = new ArrayList&lt;&gt;();\n\n        for (int i = 0; i &lt; TASK_COUNT; i++) {\n            futures.add(CompletableFuture.runAsync(() -&gt; {\n                \/\/ \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u5bfe\u8c61\u306e\u51e6\u7406\n                heavyComputation();\n            }, executor));\n        }\n\n        CompletableFuture.allOf(\n            futures.toArray(new CompletableFuture[0])\n        ).join();\n    }\n\n    private void heavyComputation() {\n        \/\/ \u91cd\u3044\u51e6\u7406\u306e\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\n        try {\n            Thread.sleep(1);\n        } catch (InterruptedException e) {\n            Thread.currentThread().interrupt();\n        }\n    }\n\n    @TearDown\n    public void tearDown() {\n        executor.shutdown();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-151\">\n<h4 class=\"wp-block-heading\" id=\"i-63\">\u30d3\u30b8\u30e5\u30a2\u30ebVM\uff08\u30d7\u30ed\u30d5\u30a1\u30a4\u30e9\uff09\u3092\u4f7f\u7528\u3057\u305f\u5206\u6790<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ProfilingExample {\n    public static void main(String[] args) {\n        \/\/ \u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u7528\u306e\u30de\u30fc\u30ab\u30fc\n        System.setProperty(\"visualvm.display.name\", \"ConcurrencyTest\");\n\n        ExecutorService executor = Executors.newFixedThreadPool(4);\n        try {\n            for (int i = 0; i &lt; 1000; i++) {\n                executor.submit(() -&gt; {\n                    \/\/ CPU\u8ca0\u8377\u306e\u9ad8\u3044\u51e6\u7406\n                    performCPUIntensiveTask();\n\n                    \/\/ \u30e1\u30e2\u30ea\u8ca0\u8377\u306e\u9ad8\u3044\u51e6\u7406\n                    performMemoryIntensiveTask();\n                });\n            }\n        } finally {\n            executor.shutdown();\n        }\n    }\n\n    private static void performCPUIntensiveTask() {\n        \/\/ CPU\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u7528\u306e\u51e6\u7406\n        for (int i = 0; i &lt; 1000000; i++) {\n            Math.sqrt(i);\n        }\n    }\n\n    private static void performMemoryIntensiveTask() {\n        \/\/ \u30e1\u30e2\u30ea\u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u7528\u306e\u51e6\u7406\n        List&lt;byte[]&gt; list = new ArrayList&lt;&gt;();\n        for (int i = 0; i &lt; 100; i++) {\n            list.add(new byte[1024]);\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-152\">\n<h4 class=\"wp-block-heading\" id=\"i-64\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-153\">\n<p class=\"wp-block-paragraph\">\u3000<strong>1. \u30b9\u30ec\u30c3\u30c9\u95a2\u9023\u306e\u554f\u984c<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-154\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30b9\u30ec\u30c3\u30c9\u30d7\u30fc\u30eb\u306e\u30b5\u30a4\u30ba<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-155\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30b9\u30ec\u30c3\u30c9\u306e\u72b6\u614b\u5206\u5e03<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-156\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u30b9\u30a4\u30c3\u30c1\u306e\u983b\u5ea6<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-157\">\n<p class=\"wp-block-paragraph\">\u3000<strong>2. \u30e1\u30e2\u30ea\u95a2\u9023\u306e\u554f\u984c<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-158\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30d2\u30fc\u30d7\u4f7f\u7528\u91cf<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-159\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf GC\u306e\u983b\u5ea6\u3068\u6642\u9593<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-160\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30e1\u30e2\u30ea\u30ea\u30fc\u30af<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-161\">\n<p class=\"wp-block-paragraph\">\u3000<strong>3. \u540c\u671f\u95a2\u9023\u306e\u554f\u984c<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-162\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30ed\u30c3\u30af\u7af6\u5408<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-163\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5f85\u6a5f\u6642\u9593<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-164\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u306e\u6709\u7121<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-165\">\n<h4 class=\"wp-block-heading\" id=\"i-65\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6539\u5584\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class PerformanceOptimization {\n    \/\/ 1. \u30d0\u30c3\u30c1\u51e6\u7406\u306e\u6700\u9069\u5316\n    public void optimizedBatchProcessing(List&lt;Task&gt; tasks) {\n        int batchSize = calculateOptimalBatchSize(tasks.size());\n        List&lt;List&lt;Task&gt;&gt; batches = Lists.partition(tasks, batchSize);\n\n        CompletableFuture&lt;?&gt;[] futures = batches.stream()\n            .map(batch -&gt; CompletableFuture.runAsync(() -&gt; {\n                processBatch(batch);\n            }))\n            .toArray(CompletableFuture[]::new);\n\n        CompletableFuture.allOf(futures).join();\n    }\n\n    \/\/ 2. \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528\n    private final LoadingCache&lt;String, Data&gt; cache = CacheBuilder.newBuilder()\n        .maximumSize(1000)\n        .expireAfterWrite(10, TimeUnit.MINUTES)\n        .build(new CacheLoader&lt;String, Data&gt;() {\n            @Override\n            public Data load(String key) {\n                return loadData(key);\n            }\n        });\n\n    \/\/ 3. \u52b9\u7387\u7684\u306a\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u4f7f\u7528\n    private final ConcurrentHashMap&lt;String, Object&gt; concurrentMap = \n        new ConcurrentHashMap&lt;&gt;();\n    private final BlockingQueue&lt;Task&gt; taskQueue = \n        new LinkedBlockingQueue&lt;&gt;();\n}<\/pre>\n\n\n<div id=\"sgb-css-id-166\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30c7\u30d0\u30c3\u30b0\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u624b\u6cd5\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u554f\u984c\u3092\u52b9\u679c\u7684\u306b\u7279\u5b9a\u3057\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-167\">\n<h2 class=\"wp-block-heading\" id=\"i-66\">\uff17\uff0e\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5b9f\u8df5\u6f14\u7fd2<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-168\">\n<h3 class=\"wp-block-heading\" id=\"i-67\">7.1 Web\u30af\u30ed\u30fc\u30e9\u30fc\u306e\u4e26\u5217\u5316\u5b9f\u88c5\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-169\">\n<p class=\"wp-block-paragraph\">Web\u30af\u30ed\u30fc\u30e9\u30fc\u306f\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u5229\u70b9\u3092\u6d3b\u304b\u305b\u308b\u5178\u578b\u7684\u306a\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-170\">\n<h4 class=\"wp-block-heading\" id=\"i-68\">\u57fa\u672c\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.util.concurrent.*;\nimport java.util.Set;\nimport java.util.concurrent.atomic.AtomicInteger;\n\npublic class ParallelWebCrawler {\n    private final ExecutorService executor;\n    private final Set&lt;String&gt; visitedUrls = \n        ConcurrentHashMap.newKeySet();\n    private final BlockingQueue&lt;String&gt; urlQueue = \n        new LinkedBlockingQueue&lt;&gt;();\n    private final AtomicInteger activeThreads = new AtomicInteger(0);\n    private final int maxDepth;\n\n    public ParallelWebCrawler(int threadCount, int maxDepth) {\n        this.executor = Executors.newFixedThreadPool(threadCount);\n        this.maxDepth = maxDepth;\n    }\n\n    public void crawl(String startUrl) {\n        urlQueue.offer(startUrl);\n        activeThreads.incrementAndGet();\n\n        while (activeThreads.get() &gt; 0) {\n            String url = urlQueue.poll();\n            if (url != null) {\n                processCrawling(url, 0);\n            }\n        }\n\n        executor.shutdown();\n    }\n\n    private void processCrawling(String url, int depth) {\n        if (depth &gt;= maxDepth || !visitedUrls.add(url)) {\n            activeThreads.decrementAndGet();\n            return;\n        }\n\n        executor.submit(() -&gt; {\n            try {\n                \/\/ URL\u304b\u3089\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u53d6\u5f97\n                String content = fetchContent(url);\n                \/\/ \u30ea\u30f3\u30af\u3092\u62bd\u51fa\n                Set&lt;String&gt; links = extractLinks(content);\n\n                \/\/ \u65b0\u3057\u3044\u30ea\u30f3\u30af\u3092\u30ad\u30e5\u30fc\u306b\u8ffd\u52a0\n                links.stream()\n                    .filter(link -&gt; !visitedUrls.contains(link))\n                    .forEach(link -&gt; {\n                        urlQueue.offer(link);\n                        activeThreads.incrementAndGet();\n                    });\n            } catch (Exception e) {\n                System.err.println(\"Error crawling \" + url + \": \" + e.getMessage());\n            } finally {\n                activeThreads.decrementAndGet();\n            }\n        });\n    }\n\n    private String fetchContent(String url) {\n        \/\/ HTTP\u8981\u6c42\u306e\u5b9f\u88c5\n        return \"Simulated content\";\n    }\n\n    private Set&lt;String&gt; extractLinks(String content) {\n        \/\/ \u30ea\u30f3\u30af\u62bd\u51fa\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\n        return new HashSet&lt;&gt;();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-171\">\n<h4 class=\"wp-block-heading\" id=\"i-69\">\u9ad8\u5ea6\u306a\u6a5f\u80fd\u306e\u8ffd\u52a0<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class AdvancedWebCrawler extends ParallelWebCrawler {\n    private final RateLimiter rateLimiter;\n    private final MetricsCollector metrics;\n\n    public class MetricsCollector {\n        private final AtomicInteger successfulRequests = new AtomicInteger(0);\n        private final AtomicInteger failedRequests = new AtomicInteger(0);\n\n        public void recordSuccess() {\n            successfulRequests.incrementAndGet();\n        }\n\n        public void recordFailure() {\n            failedRequests.incrementAndGet();\n        }\n\n        public String getStats() {\n            return String.format(\n                \"\u6210\u529f: %d, \u5931\u6557: %d\", \n                successfulRequests.get(), \n                failedRequests.get()\n            );\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-172\">\n<h3 class=\"wp-block-heading\" id=\"i-70\">7.2 \u753b\u50cf\u51e6\u7406\u306e\u4e26\u5217\u51e6\u7406\u5b9f\u88c5\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-173\">\n<p class=\"wp-block-paragraph\">\u753b\u50cf\u51e6\u7406\u306f\u3001CPU\u30a4\u30f3\u30c6\u30f3\u30b7\u30d6\u306a\u51e6\u7406\u306e\u5178\u578b\u4f8b\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-174\">\n<h4 class=\"wp-block-heading\" id=\"i-71\">\u57fa\u672c\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">import java.awt.image.BufferedImage;\nimport java.util.concurrent.ForkJoinPool;\nimport java.util.concurrent.RecursiveAction;\n\npublic class ParallelImageProcessor {\n    private static final int THRESHOLD = 100_000; \/\/ \u30d4\u30af\u30bb\u30eb\u6570\u306e\u3057\u304d\u3044\u5024\n\n    public class ImageProcessingTask extends RecursiveAction {\n        private final BufferedImage image;\n        private final int startX, startY, width, height;\n\n        public ImageProcessingTask(BufferedImage image, \n                                 int startX, int startY, \n                                 int width, int height) {\n            this.image = image;\n            this.startX = startX;\n            this.startY = startY;\n            this.width = width;\n            this.height = height;\n        }\n\n        @Override\n        protected void compute() {\n            if (width * height &lt;= THRESHOLD) {\n                processImageChunk();\n            } else {\n                subdivideAndProcess();\n            }\n        }\n\n        private void processImageChunk() {\n            for (int y = startY; y &lt; startY + height; y++) {\n                for (int x = startX; x &lt; startX + width; x++) {\n                    int rgb = image.getRGB(x, y);\n                    int newRgb = applyFilter(rgb);\n                    image.setRGB(x, y, newRgb);\n                }\n            }\n        }\n\n        private void subdivideAndProcess() {\n            int halfWidth = width \/ 2;\n            int halfHeight = height \/ 2;\n\n            invokeAll(\n                new ImageProcessingTask(image, startX, startY, \n                    halfWidth, halfHeight),\n                new ImageProcessingTask(image, startX + halfWidth, startY, \n                    width - halfWidth, halfHeight),\n                new ImageProcessingTask(image, startX, startY + halfHeight, \n                    halfWidth, height - halfHeight),\n                new ImageProcessingTask(image, startX + halfWidth, \n                    startY + halfHeight, \n                    width - halfWidth, height - halfHeight)\n            );\n        }\n\n        private int applyFilter(int rgb) {\n            \/\/ \u30d5\u30a3\u30eb\u30bf\u30fc\u51e6\u7406\u306e\u5b9f\u88c5\n            return rgb;\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-175\">\n<h4 class=\"wp-block-heading\" id=\"i-72\">\u753b\u50cf\u51e6\u7406\u30d5\u30a3\u30eb\u30bf\u30fc\u306e\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ImageFilters {\n    \/\/ \u30b0\u30ec\u30fc\u30b9\u30b1\u30fc\u30eb\u5909\u63db\n    public static int toGrayscale(int rgb) {\n        int r = (rgb &gt;&gt; 16) &amp; 0xFF;\n        int g = (rgb &gt;&gt; 8) &amp; 0xFF;\n        int b = rgb &amp; 0xFF;\n\n        int gray = (r + g + b) \/ 3;\n        return (gray &lt;&lt; 16) | (gray &lt;&lt; 8) | gray;\n    }\n\n    \/\/ \u307c\u304b\u3057\u30d5\u30a3\u30eb\u30bf\u30fc\n    public static BufferedImage applyBlur(BufferedImage source) {\n        int width = source.getWidth();\n        int height = source.getHeight();\n        BufferedImage result = new BufferedImage(\n            width, height, BufferedImage.TYPE_INT_RGB);\n\n        ForkJoinPool pool = new ForkJoinPool();\n        pool.invoke(new ImageProcessingTask(source, result, \n            0, 0, width, height));\n\n        return result;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-176\">\n<h3 class=\"wp-block-heading\" id=\"i-73\">7.3 \u5927\u91cf\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u4e26\u5217\u5316\u5b9f\u88c5\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-177\">\n<p class=\"wp-block-paragraph\">\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u306f\u3001\u4e26\u5217\u51e6\u7406\u306e\u6069\u6075\u3092\u6700\u3082\u53d7\u3051\u3084\u3059\u3044\u9818\u57df\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-178\">\n<h4 class=\"wp-block-heading\" id=\"i-74\">\u57fa\u672c\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class ParallelDataProcessor {\n    private final ExecutorService executor;\n    private final int batchSize;\n\n    public ParallelDataProcessor(int threadCount, int batchSize) {\n        this.executor = Executors.newFixedThreadPool(threadCount);\n        this.batchSize = batchSize;\n    }\n\n    public &lt;T&gt; void processData(List&lt;T&gt; data, \n                              Consumer&lt;T&gt; processor) {\n        List&lt;List&lt;T&gt;&gt; batches = splitIntoBatches(data);\n\n        List&lt;CompletableFuture&lt;Void&gt;&gt; futures = batches.stream()\n            .map(batch -&gt; CompletableFuture.runAsync(() -&gt; {\n                for (T item : batch) {\n                    processor.accept(item);\n                }\n            }, executor))\n            .collect(Collectors.toList());\n\n        CompletableFuture.allOf(\n            futures.toArray(new CompletableFuture[0])\n        ).join();\n    }\n\n    private &lt;T&gt; List&lt;List&lt;T&gt;&gt; splitIntoBatches(List&lt;T&gt; data) {\n        List&lt;List&lt;T&gt;&gt; batches = new ArrayList&lt;&gt;();\n        for (int i = 0; i &lt; data.size(); i += batchSize) {\n            batches.add(data.subList(i, \n                Math.min(i + batchSize, data.size())));\n        }\n        return batches;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-179\">\n<h4 class=\"wp-block-heading\" id=\"i-75\">\u4e26\u5217\u30c7\u30fc\u30bf\u51e6\u7406\u306e\u9ad8\u5ea6\u306a\u5b9f\u88c5<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class AdvancedDataProcessor {\n    private final ExecutorService executor;\n    private final BlockingQueue&lt;DataBatch&gt; workQueue;\n    private final AtomicBoolean isProcessing;\n\n    public class DataBatch {\n        private final List&lt;?&gt; data;\n        private final int batchId;\n\n        public DataBatch(List&lt;?&gt; data, int batchId) {\n            this.data = data;\n            this.batchId = batchId;\n        }\n    }\n\n    public void startProcessing() {\n        int workerCount = Runtime.getRuntime().availableProcessors();\n        for (int i = 0; i &lt; workerCount; i++) {\n            executor.submit(new DataProcessor());\n        }\n    }\n\n    private class DataProcessor implements Runnable {\n        @Override\n        public void run() {\n            while (isProcessing.get() || !workQueue.isEmpty()) {\n                try {\n                    DataBatch batch = workQueue.poll(\n                        100, TimeUnit.MILLISECONDS);\n                    if (batch != null) {\n                        processBatch(batch);\n                    }\n                } catch (InterruptedException e) {\n                    Thread.currentThread().interrupt();\n                    break;\n                }\n            }\n        }\n\n        private void processBatch(DataBatch batch) {\n            \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u306e\u5b9f\u88c5\n            try {\n                \/\/ \u30c7\u30fc\u30bf\u51e6\u7406\u30ed\u30b8\u30c3\u30af\n                Thread.sleep(100); \/\/ \u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u7528\n            } catch (Exception e) {\n                System.err.println(\"Error processing batch \" + \n                    batch.batchId + \": \" + e.getMessage());\n            }\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-180\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u901a\u3058\u3066\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5b9f\u969b\u306e\u5fdc\u7528\u65b9\u6cd5\u3092\u5b66\u3076\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u4f8b\u3067\u793a\u3057\u305f\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3082\u5fdc\u7528\u53ef\u80fd\u306a\u8a2d\u8a08\u539f\u5247\u3068\u5b9f\u88c5\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-181\">\n<h2 class=\"wp-block-heading\" id=\"i-76\">\uff18\uff0e\u307e\u3068\u3081\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-182\">\n<h3 class=\"wp-block-heading\" id=\"i-77\">8.1 \u672c\u8a18\u4e8b\u306e\u307e\u3068\u3081<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-183\">\n<p class=\"wp-block-paragraph\">\u672c\u8a18\u4e8b\u3067\u5b66\u7fd2\u3057\u305f\u30dd\u30a4\u30f3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-203\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5b66\u7fd2\u3057\u305f\u30dd\u30a4\u30f3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\"><div id=\"sgb-css-id-184\">\n<p class=\"wp-block-paragraph\"><strong>1. \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306e\u57fa\u790e<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-185\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30b9\u30ec\u30c3\u30c9\u306e\u6982\u5ff5\u3068\u52d5\u4f5c\u539f\u7406<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-186\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5fc5\u8981\u6027<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-187\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u3068\u306e\u9055\u3044<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-188\">\n<p class=\"wp-block-paragraph\"><strong>2. \u5b9f\u88c5\u624b\u6cd5<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-189\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf Thread\u7d99\u627f<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-190\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf Runnable\u5b9f\u88c5<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-191\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf ExecutorService\u6d3b\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-192\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u6700\u65b0API\u306e\u4f7f\u7528\u65b9\u6cd5<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-193\">\n<p class=\"wp-block-paragraph\"><strong>3. \u540c\u671f\u3068\u5236\u5fa1<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-194\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf synchronized\u6a5f\u69cb<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-195\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf Lock API\u306e\u4f7f\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-196\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30c7\u30c3\u30c9\u30ed\u30c3\u30af\u9632\u6b62<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-197\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u7af6\u5408\u72b6\u614b\u306e\u5236\u5fa1<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-198\">\n<p class=\"wp-block-paragraph\"><strong>4. \u5b9f\u8df5\u7684\u306a\u30b9\u30ad\u30eb<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-199\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30c7\u30d0\u30c3\u30b0\u624b\u6cd5<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-200\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-201\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-202\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/p>\n<\/div><\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-204\">\n<h3 class=\"wp-block-heading\" id=\"i-78\">8.2 \u5b9f\u8df5\u6f14\u7fd2\u8ab2\u984c<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-205\">\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u306e\u8ab2\u984c\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u3067\u3001\u5b66\u7fd2\u5185\u5bb9\u3092\u5b9a\u7740\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u8ab2\u984c1: \u4e26\u884c\u51e6\u7406\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\n * \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u3068\u7570\u306a\u308b\u30b9\u30ec\u30c3\u30c9\u6570\u3067\u306e\u51e6\u7406\u6642\u9593\u3092\u6bd4\u8f03\n *\/\npublic class Exercise1 {\n    public static void main(String[] args) {\n        \/\/ \u30c7\u30fc\u30bf\u6e96\u5099\n        List&lt;Integer&gt; numbers = IntStream.range(0, 1_000_000)\n            .boxed().collect(Collectors.toList());\n\n        \/\/ \u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u51e6\u7406\n        long start = System.currentTimeMillis();\n        processSequential(numbers);\n        long singleThreadTime = System.currentTimeMillis() - start;\n\n        \/\/ \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u51e6\u7406\uff084\u30b9\u30ec\u30c3\u30c9\uff09\n        start = System.currentTimeMillis();\n        processParallel(numbers, 4);\n        long multiThreadTime = System.currentTimeMillis() - start;\n\n        System.out.println(\"\u30b7\u30f3\u30b0\u30eb\u30b9\u30ec\u30c3\u30c9\u6642\u9593: \" + singleThreadTime + \"ms\");\n        System.out.println(\"\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u6642\u9593: \" + multiThreadTime + \"ms\");\n    }\n\n    private static void processSequential(List&lt;Integer&gt; numbers) {\n        \/\/ \u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\n    }\n\n    private static void processParallel(List&lt;Integer&gt; numbers, int threadCount) {\n        \/\/ \u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\n    }\n}\n\n\/**\n * \u8ab2\u984c2: \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5b9f\u88c5\n * \u8aad\u307f\u53d6\u308a\u512a\u5148\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u5b9f\u88c5\n *\/\npublic class Exercise2 {\n    public interface ThreadSafeCache&lt;K, V&gt; {\n        V get(K key);\n        void put(K key, V value);\n        void clear();\n        int size();\n    }\n\n    \/\/ \u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\n}\n\n\/**\n * \u8ab2\u984c3: \u751f\u7523\u8005-\u6d88\u8cbb\u8005\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\n * \u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u30ad\u30e5\u30fc\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\n *\/\npublic class Exercise3 {\n    public interface MessageQueue&lt;T&gt; {\n        void send(T message);\n        T receive();\n        boolean isEmpty();\n    }\n\n    \/\/ \u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\n}<\/pre>\n\n\n<div id=\"sgb-css-id-206\">\n<h3 class=\"wp-block-heading\" id=\"i-79\">8.3 \u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-207\">\n<h4 class=\"wp-block-heading\" id=\"i-80\">1. \u4e0a\u7d1a\u30c8\u30d4\u30c3\u30af\u306e\u5b66\u7fd2<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-208\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf <strong>Reactive Programming<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-209\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf Project Reactor<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-210\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf RxJava<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-211\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf Spring WebFlux<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-212\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf <strong>\u9ad8\u5ea6\u306a\u4e26\u884c\u51e6\u7406<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-213\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30a2\u30af\u30bf\u30fc\u30e2\u30c7\u30eb<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-214\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf Software Transactional Memory (STM)<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-215\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u5206\u6563\u30b7\u30b9\u30c6\u30e0\u306e\u4e26\u884c\u51e6\u7406<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-216\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf <strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-217\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf JVM\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-218\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf GC\u6700\u9069\u5316<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-219\">\n<p class=\"wp-block-paragraph\">\u3000\u3000\u25cf \u30d7\u30ed\u30d5\u30a1\u30a4\u30ea\u30f3\u30b0\u6280\u8853<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-220\">\n<h4 class=\"wp-block-heading\" id=\"i-81\">2. \u63a8\u5968\u66f8\u7c4d<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-221\">\n<p class=\"wp-block-paragraph\">\u30001. \u201cJava Concurrency in Practice\u201d by Brian Goetz<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-222\">\n<p class=\"wp-block-paragraph\">\u30002. \u201cSeven Concurrency Models in Seven Weeks\u201d by Paul Butcher<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-223\">\n<p class=\"wp-block-paragraph\">\u30003. \u201cOptimizing Java\u201d by Benjamin J Evans<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-224\">\n<h4 class=\"wp-block-heading\" id=\"i-82\">3. \u5b9f\u8df5\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u6848<\/h4>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u30d7\u30ed\u30b8\u30a7\u30af\u30c81: \u4e26\u884cWeb\u30af\u30ed\u30fc\u30e9\u30fc\n * - \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306b\u3088\u308bWeb\u30da\u30fc\u30b8\u53d6\u5f97\n * - \u30c7\u30fc\u30bf\u306e\u4e26\u884c\u51e6\u7406\n * - \u7d50\u679c\u306e\u96c6\u7d04\n *\/\npublic class WebCrawlerProject {\n    public interface WebCrawler {\n        void crawl(String startUrl, int depth);\n        List&lt;String&gt; getVisitedUrls();\n        Map&lt;String, String&gt; getPageContents();\n    }\n}\n\n\/**\n * \u30d7\u30ed\u30b8\u30a7\u30af\u30c82: \u5206\u6563\u8a08\u7b97\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\n * - \u30bf\u30b9\u30af\u306e\u5206\u5272\u3068\u914d\u5e03\n * - \u7d50\u679c\u306e\u53ce\u96c6\u3068\u96c6\u7d04\n * - \u969c\u5bb3\u5fa9\u65e7\u6a5f\u80fd\n *\/\npublic class DistributedComputingProject {\n    public interface ComputeNode {\n        void submitTask(Task task);\n        Result getResult();\n        void join(NodeNetwork network);\n        void leave(NodeNetwork network);\n    }\n}\n\n\/**\n * \u30d7\u30ed\u30b8\u30a7\u30af\u30c83: \u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u30c1\u30e3\u30c3\u30c8\u30b7\u30b9\u30c6\u30e0\n * - \u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u975e\u540c\u671f\u51e6\u7406\n * - \u30e6\u30fc\u30b6\u30fc\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\n * - \u30d7\u30c3\u30b7\u30e5\u901a\u77e5\n *\/\npublic class ChatSystemProject {\n    public interface ChatServer {\n        void start(int port);\n        void broadcast(Message message);\n        void addUser(User user);\n        void removeUser(User user);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-225\">\n<h4 class=\"wp-block-heading\" id=\"i-83\">4. \u30aa\u30f3\u30e9\u30a4\u30f3\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-226\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf Java\u4eee\u60f3\u30b9\u30ec\u30c3\u30c9\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-227\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf Spring Framework\u306e\u4e26\u884c\u51e6\u7406\u30ac\u30a4\u30c9<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-228\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u306b\u304a\u3051\u308b\u4e26\u884c\u51e6\u7406\u30d1\u30bf\u30fc\u30f3<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-229\">\n<p class=\"wp-block-paragraph\">\u3000\u25cf \u30af\u30e9\u30a6\u30c9\u30cd\u30a4\u30c6\u30a3\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u4e26\u884c\u51e6\u7406<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-230\">\n<h4 class=\"wp-block-heading\" id=\"i-84\">5. \u5b9f\u8df5\u7684\u306a\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u306e\u305f\u3081\u306eTips<\/h4>\n<\/div>\n\n<div id=\"sgb-css-id-231\">\n<p class=\"wp-block-paragraph\">\u30001. \u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3078\u306e\u53c2\u52a0<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-232\">\n<p class=\"wp-block-paragraph\">\u30002. \u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3078\u306e\u8ca2\u732e<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-233\">\n<p class=\"wp-block-paragraph\">\u30003. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c6\u30b9\u30c8\u306e\u5b9f\u65bd<\/p>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u30004. \u969c\u5bb3\u5bfe\u5fdc\u6f14\u7fd2\u306e\u5b9f\u65bd<\/p>\n\n\n<div id=\"sgb-css-id-234\">\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3089\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u901a\u3058\u3066\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30b9\u30ad\u30eb\u3092\u7d99\u7d9a\u7684\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5b9f\u8df5\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u3067\u3001\u7406\u8ad6\u3068\u5b9f\u8df5\u306e\u4e21\u9762\u3067\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u3092\u56f3\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; 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