{"id":454,"date":"2024-10-23T11:22:01","date_gmt":"2024-10-23T02:22:01","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=454"},"modified":"2025-03-24T08:53:24","modified_gmt":"2025-03-23T23:53:24","slug":"%e3%82%bf%e3%82%a4%e3%83%88%e3%83%ab%ef%bc%9a%e3%80%902024%e5%b9%b4%e6%9c%80%e6%96%b0%e3%80%91java%e3%82%a4%e3%83%b3%e3%82%b9%e3%82%bf%e3%83%b3%e3%82%b9%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=454","title":{"rendered":"\u30bf\u30a4\u30c8\u30eb\uff1a\u30102024\u5e74\u6700\u65b0\u3011Java\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u57fa\u790e\u6982\u5ff5\u304b\u3089\u5b9f\u8df5\u7684\u6d3b\u7528\u6cd5\u307e\u3067"},"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\">1. Java\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u306f\uff1a\u57fa\u790e\u6982\u5ff5\u306e\u89e3\u8aac<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">1.1 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5f79\u5272<\/a>      <\/li>      <li>        <a href=\"#i-2\">1.2 \u30af\u30e9\u30b9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u95a2\u4fc2\uff1a\u9752\u5199\u771f\u3068\u5b9f\u4f53\u306e\u4f8b\u3048<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">1.3 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30af\u30e9\u30b9\u5909\u6570\u306e\u9055\u3044<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">2. Java\u3067\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\uff1a\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">2.1 new \u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u305f\u6a19\u6e96\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-6\">2.2 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f79\u5272\u3068\u8907\u6570\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4f7f\u3044\u5206\u3051<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">2.3 \u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u3092\u7528\u3044\u305f\u9ad8\u5ea6\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">3. \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u6cd5\uff1a5\u3064\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">3.1 \u9069\u5207\u306a\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u3088\u308b\u30c7\u30fc\u30bf\u4fdd\u8b77<\/a>      <\/li>      <li>        <a href=\"#i-10\">3.2 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u52b9\u679c\u7684\u306a\u8a2d\u8a08<\/a>      <\/li>      <li>        <a href=\"#i-11\">3.3 \u4e0d\u5909\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6d3b\u7528\u3068\u305d\u306e\u30e1\u30ea\u30c3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-12\">3.4 \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u9069\u5207\u306a\u4f7f\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-13\">3.5 \u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">4. \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u7ba1\u7406\uff1aJava\u306e\u88cf\u5074\u3092\u7406\u89e3\u3059\u308b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">4.1 JVM\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6271\u3044\uff1a\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u3068\u30b9\u30bf\u30c3\u30af\u30e1\u30e2\u30ea<\/a>      <\/li>      <li>        <a href=\"#i-16\">4.2 \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-17\">4.3 \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-18\">5. \u5b9f\u8df5\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u6d3b\u7528\u4f8b\uff1a\u30b3\u30fc\u30c9\u89e3\u8aac\u4ed8\u304d<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-19\">5.1 \u30c7\u30fc\u30bf\u7ba1\u7406\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u6d3b\u7528<\/a>      <\/li>      <li>        <a href=\"#i-20\">5.2 \u4e26\u5217\u51e6\u7406\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">5.3 \u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u8a2d\u8a08\u306e\u5b9f\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-22\">6. Java 17\u4ee5\u964d\u306e\u65b0\u6a5f\u80fd\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\uff1a\u6700\u65b0\u30c8\u30ec\u30f3\u30c9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-23\">6.1 \u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u306b\u3088\u308b\u7c21\u6f54\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5b9a\u7fa9<\/a>      <\/li>      <li>        <a href=\"#i-24\">6.2 \u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u3092\u7528\u3044\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u578b\u5b89\u5168\u6027\u5411\u4e0a<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-25\">6.3 \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u3088\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u64cd\u4f5c\u306e\u7c21\u7d20\u5316<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-26\">7. \u307e\u3068\u3081\uff1aJava\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-27\">7.1 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u4f7f\u7528\u306e \u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-28\">7.2 \u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a2\u30a4\u30c7\u30a2<\/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\">1. Java\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u306f\uff1a\u57fa\u790e\u6982\u5ff5\u306e\u89e3\u8aac<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u3076\u4e0a\u3067\u3001\u300c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u300d\u306f\u6700\u3082\u91cd\u8981\u306a\u6982\u5ff5\u306e1\u3064\u3067\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u306f\u3001\u7c21\u5358\u306b\u8a00\u3048\u3070\u3001\u30af\u30e9\u30b9\u304b\u3089\u751f\u6210\u3055\u308c\u305f\u5177\u4f53\u7684\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5b9f\u884c\u6642\u306b\u30e1\u30e2\u30ea\u4e0a\u306b\u5b58\u5728\u3059\u308b\u5b9f\u4f53\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u305f\u5f62\u3067\u8868\u73fe\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<h3 class=\"wp-block-heading\" id=\"i-1\">1.1 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5f79\u5272<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\uff08OOP\uff09\u306b\u304a\u3044\u3066\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u305d\u306e\u4e3b\u306a\u5f79\u5272\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\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\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u4e3b\u306a\u5f79\u5272<\/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-5\">\n<li><strong>\u30c7\u30fc\u30bf\u3068\u30e1\u30bd\u30c3\u30c9\u306e\u30ab\u30d7\u30bb\u30eb\u5316<\/strong>\uff1a \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001\u95a2\u9023\u3059\u308b\u30c7\u30fc\u30bf\uff08\u5c5e\u6027\uff09\u3068\u305d\u306e\u30c7\u30fc\u30bf\u3092\u64cd\u4f5c\u3059\u308b\u30e1\u30bd\u30c3\u30c9\uff08\u632f\u308b\u821e\u3044\uff09\u3092\u3072\u3068\u307e\u3068\u3081\u306b\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-6\">\n<li><strong>\u5b9f\u4e16\u754c\u306e\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306e\u30e2\u30c7\u30eb\u5316<\/strong>\uff1a \u73fe\u5b9f\u4e16\u754c\u306e\u7269\u4e8b\u3084\u6982\u5ff5\u3092\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u3068\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/strong>\uff1a \u540c\u3058\u30af\u30e9\u30b9\u304b\u3089\u8907\u6570\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3057\u3001\u5909\u66f4\u3084\u62e1\u5f35\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">1.2 \u30af\u30e9\u30b9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u95a2\u4fc2\uff1a\u9752\u5199\u771f\u3068\u5b9f\u4f53\u306e\u4f8b\u3048<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\n<p>\u30af\u30e9\u30b9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u95a2\u4fc2\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u300c\u8a2d\u8a08\u56f3\uff08\u9752\u5199\u771f\uff09\u3068\u88fd\u54c1\u300d\u306e\u4f8b\u3048\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\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\">\u30af\u30e9\u30b9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u95a2\u4fc2<\/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-10\">\n<li><strong>\u30af\u30e9\u30b9<\/strong>\uff1a\u8a2d\u8a08\u56f3\u3084\u9752\u5199\u771f\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002\u88fd\u54c1\u306e\u69cb\u9020\u3001\u7279\u5fb4\u3001\u6a5f\u80fd\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u304c\u3001\u305d\u308c\u81ea\u4f53\u306f\u5177\u4f53\u7684\u306a\u88fd\u54c1\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<\/strong>\uff1a\u8a2d\u8a08\u56f3\u304b\u3089\u4f5c\u3089\u308c\u305f\u5177\u4f53\u7684\u306a\u88fd\u54c1\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002\u540c\u3058\u8a2d\u8a08\u56f3\u304b\u3089\u8907\u6570\u306e\u88fd\u54c1\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u305d\u308c\u305e\u308c\u304c\u72ec\u81ea\u306e\u7279\u6027\u3092\u6301\u3061\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-12\">\n<p>\u4f8b\u3048\u3070\u3001\u300c\u8eca\u300d\u3068\u3044\u3046\u30af\u30e9\u30b9\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u30af\u30e9\u30b9\u306f\u8eca\u306e\u57fa\u672c\u7684\u306a\u7279\u5fb4\uff08\u8272\u3001\u30e2\u30c7\u30eb\u3001\u901f\u5ea6\u306a\u3069\uff09\u3068\u6a5f\u80fd\uff08\u8d70\u308b\u3001\u6b62\u307e\u308b\u306a\u3069\uff09\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u5b9f\u969b\u306e\u8eca\uff08\u4f8b\uff1a\u8d64\u3044\u30b9\u30dd\u30fc\u30c4\u30ab\u30fc\u3001\u9752\u3044\u30d5\u30a1\u30df\u30ea\u30fc\u30ab\u30fc\uff09\u306f\u3001\u3053\u306e\u300c\u8eca\u300d\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<h3 class=\"wp-block-heading\" id=\"i-3\">1.3 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30af\u30e9\u30b9\u5909\u6570\u306e\u9055\u3044<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-14\">\n<p>Java\u3067\u306f\u3001\u5909\u6570\u306e\u7a2e\u985e\u306b\u3088\u3063\u3066\u30c7\u30fc\u30bf\u306e\u6271\u3044\u65b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u4e3b\u306b\u4ee5\u4e0b\u306e2\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-15\">\n<p>1. <strong>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-16\">\n<p>\u3000\u25cf \u5404\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u56fa\u6709\u306e\u5024\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-17\">\n<p>\u3000\u25cf \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3054\u3068\u306b\u72ec\u7acb\u3057\u3066\u5024\u3092\u5909\u66f4\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-18\">\n<p>\u3000\u25cf <code>new<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b\u305f\u3073\u306b\u65b0\u3057\u304f\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-19\">\n<p>2. <strong>\u30af\u30e9\u30b9\u5909\u6570\uff08\u9759\u7684\u5909\u6570\uff09<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-20\">\n<p>\u3000\u25cf \u30af\u30e9\u30b9\u5168\u4f53\u3067\u5171\u6709\u3055\u308c\u308b\u5024\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-21\">\n<p>\u3000\u25cf \u3059\u3079\u3066\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u540c\u3058\u5024\u3092\u53c2\u7167\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-22\">\n<p>\u3000\u25cf <code>static<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5ba3\u8a00\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<p>\u4ee5\u4e0b\u306b\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30af\u30e9\u30b9\u5909\u6570\u306e\u9055\u3044\u3092\u793a\u3059\u7c21\u5358\u306a\u30b3\u30fc\u30c9\u4f8b\u3092\u793a\u3057\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=\"\">public class Car {\n    \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\n    private String color;\n    private int speed;\n\n    \/\/ \u30af\u30e9\u30b9\u5909\u6570\n    private static int totalCars = 0;\n\n    public Car(String color) {\n        this.color = color;\n        this.speed = 0;\n        totalCars++; \/\/ \u65b0\u3057\u3044\u8eca\u304c\u4f5c\u3089\u308c\u308b\u305f\u3073\u306b\u30ab\u30a6\u30f3\u30c8\u30a2\u30c3\u30d7\n    }\n\n    \/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\n    public void accelerate(int increment) {\n        this.speed += increment;\n    }\n\n    \/\/ \u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\n    public static int getTotalCars() {\n        return totalCars;\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nCar redCar = new Car(\"\u8d64\");\nCar blueCar = new Car(\"\u9752\");\n\nredCar.accelerate(50); \/\/ redCar\u306e\u901f\u5ea6\u304c50\u5897\u52a0\nSystem.out.println(Car.getTotalCars()); \/\/ 2\u304c\u51fa\u529b\u3055\u308c\u308b<\/pre>\n\n\n<div id=\"sgb-css-id-24\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>color<\/code>\u3068<code>speed<\/code>\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3067\u3001\u5404<code>Car<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u72ec\u81ea\u306e\u5024\u3092\u6301\u3061\u307e\u3059\u3002\u4e00\u65b9\u3001<code>totalCars<\/code>\u306f\u30af\u30e9\u30b9\u5909\u6570\u3067\u3001\u5168\u3066\u306e<code>Car<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u5171\u6709\u3055\u308c\u3001\u4f5c\u6210\u3055\u308c\u305f\u8eca\u306e\u7dcf\u6570\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-25\">\n<p>\u4ee5\u4e0a\u304cJava\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u57fa\u672c\u6982\u5ff5\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u790e\u3092\u56fa\u3081\u3001\u3088\u308a\u52b9\u679c\u7684\u306aJava\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-26\">\n<h2 class=\"wp-block-heading\" id=\"i-4\">2. Java\u3067\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\uff1a\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<p>Java\u3067\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u306f\u3001\u5358\u7d14\u306a\u3082\u306e\u304b\u3089\u8907\u96d1\u306a\u3082\u306e\u307e\u3067\u69d8\u3005\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u304b\u3089\u9ad8\u5ea6\u306a\u624b\u6cd5\u307e\u3067\u3001\u6bb5\u968e\u7684\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-28\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">2.1 new \u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u305f\u6a19\u6e96\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-29\">\n<p>\u6700\u3082\u4e00\u822c\u7684\u3067\u57fa\u672c\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u65b9\u6cd5\u306f\u3001<code>new<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\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=\"\">ClassName objectName = new ClassName();<\/pre>\n\n\n<div id=\"sgb-css-id-30\">\n<p><code>String<\/code>\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3059\u308b\u5834\u5408\u306e\u4f8b\u306f\u4ee5\u4e0b\u306e\u901a\u308a\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=\"\">String message = new String(\"Hello, World!\");<\/pre>\n\n\n<div id=\"sgb-css-id-31\">\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u4ed8\u304d\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3082\u540c\u69d8\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=\"\">public class Person {\n    private String name;\n    private int age;\n\n    public Person(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n}\n\n\/\/ \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\nPerson person = new Person(\"John Doe\", 30);<\/pre>\n\n\n<div id=\"sgb-css-id-32\">\n<h3 class=\"wp-block-heading\" id=\"i-6\">2.2 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f79\u5272\u3068\u8907\u6570\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u4f7f\u3044\u5206\u3051<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-33\">\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u5316\u3092\u62c5\u5f53\u3057\u307e\u3059\u3002Java\u3067\u306f\u8907\u6570\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u5b9a\u7fa9\u3067\u304d\u3001\u3053\u308c\u3092\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<p>1. <strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/strong>\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=\"\">   public Person() {\n       \/\/ \u521d\u671f\u5316\u51e6\u7406\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-35\">\n<p>2. <strong>\u30d1\u30e9\u30e1\u30fc\u30bf\u4ed8\u304d\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/strong>\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=\"\">   public Person(String name) {\n       this.name = name;\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-36\">\n<p>3. <strong>\u8907\u6570\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/strong>\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=\"\">   public Person(String name, int age) {\n       this.name = name;\n       this.age = age;\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-37\">\n<p>4. <code><strong>this()<\/strong><\/code><strong>\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u9023\u9396<\/strong>\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=\"\">   public Person() {\n       this(\"John Doe\", 30); \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3067\u30d1\u30e9\u30e1\u30fc\u30bf\u4ed8\u304d\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-38\">\n<p>\u8907\u6570\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u6642\u306e\u67d4\u8edf\u6027\u304c\u5897\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-39\">\n<h3 class=\"wp-block-heading\" id=\"i-7\">2.3 \u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u3092\u7528\u3044\u305f\u9ad8\u5ea6\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-40\">\n<p>\u3088\u308a\u9ad8\u5ea6\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u65b9\u6cd5\u3068\u3057\u3066\u3001\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<p>1. <strong>\u9759\u7684\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9<\/strong>\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=\"\">   public class Person {\n       private String name;\n       private int age;\n\n       private Person(String name, int age) {\n           this.name = name;\n           this.age = age;\n       }\n\n       public static Person createAdult(String name) {\n           return new Person(name, 18);\n       }\n\n       public static Person createChild(String name) {\n           return new Person(name, 10);\n       }\n   }\n\n   \/\/ \u4f7f\u7528\u4f8b\n   Person adult = Person.createAdult(\"John\");\n   Person child = Person.createChild(\"Alice\");<\/pre>\n\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:#009EF3;color:#FFF\" class=\"sgb-box-simple__title\">\u9759\u7684\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u306e\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-42\">\n<li>\u30e1\u30bd\u30c3\u30c9\u540d\u3067\u751f\u6210\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7279\u6027\u3092\u8868\u73fe\u3067\u304d\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-43\">\n<li>\u6bce\u56de\u65b0\u3057\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\u306a\u3069\u306e\u5b9f\u88c5\u304c\u53ef\u80fd\uff09<\/li>\n<\/div>\n\n\n<li>\u623b\u308a\u5024\u306e\u578b\u3092\u67d4\u8edf\u306b\u5909\u66f4\u3067\u304d\u308b\uff08\u30b5\u30d6\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\u3053\u3068\u3082\u53ef\u80fd\uff09<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-44\">\n<p>2. <strong>\u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3<\/strong>\uff1a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-45\">\n<p>\u3000 \u8907\u96d1\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210\u306b\u9069\u3057\u3066\u3044\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=\"\">   public class Person {\n       private final String name;\n       private final int age;\n       private final String address;\n\n       private Person(Builder builder) {\n           this.name = builder.name;\n           this.age = builder.age;\n           this.address = builder.address;\n       }\n\n       public static class Builder {\n           private String name;\n           private int age;\n           private String address;\n\n           public Builder name(String name) {\n               this.name = name;\n               return this;\n           }\n\n           public Builder age(int age) {\n               this.age = age;\n               return this;\n           }\n\n           public Builder address(String address) {\n               this.address = address;\n               return this;\n           }\n\n           public Person build() {\n               return new Person(this);\n           }\n       }\n   }\n\n   \/\/ \u4f7f\u7528\u4f8b\n   Person person = new Person.Builder()\n       .name(\"John Doe\")\n       .age(30)\n       .address(\"123 Main St\")\n       .build();<\/pre>\n\n\n<div id=\"sgb-css-id-48\">\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\">\u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-46\">\n<li>\u67d4\u8edf\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u69cb\u7bc9\u304c\u53ef\u80fd<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<li>\u53ef\u8aad\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u306b\u306a\u308b<\/li>\n<\/div>\n\n\n<li>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u9806\u5e8f\u3092\u6c17\u306b\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-49\">\n<p>\u3053\u308c\u3089\u306e\u65b9\u6cd5\u3092\u9069\u5207\u306b\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-50\">\n<h2 class=\"wp-block-heading\" id=\"i-8\">3. \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u6cd5\uff1a5\u3064\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-51\">\n<p>Java\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3001\u9ad8\u54c1\u8cea\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u3053\u3067\u306f\u30015\u3064\u306e\u91cd\u8981\u306a\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u7d39\u4ecb\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u5b9f\u88c5\u65b9\u6cd5\u3068\u5229\u70b9\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-52\">\n<h3 class=\"wp-block-heading\" id=\"i-9\">3.1 \u9069\u5207\u306a\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u3088\u308b\u30c7\u30fc\u30bf\u4fdd\u8b77<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-53\">\n<p>\u30ab\u30d7\u30bb\u30eb\u5316\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u672c\u539f\u5247\u306e1\u3064\u3067\u3059\u3002\u9069\u5207\u306a\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u3088\u308a\u3001\u30af\u30e9\u30b9\u306e\u5185\u90e8\u30c7\u30fc\u30bf\u3092\u5916\u90e8\u304b\u3089\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3055\u308c\u308b\u3053\u3068\u3092\u9632\u304e\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u8b77\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-55\">\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\">\u5b9f\u88c5\u65b9\u6cd5<\/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-54\">\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3092<code>private<\/code>\u306b\u3059\u308b<\/li>\n<\/div>\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066<code>getter<\/code>\u3068<code>setter<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u63d0\u4f9b\u3059\u308b<\/li>\n<\/ol>\n<\/div><\/div>\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 double balance;\n\n    public double getBalance() {\n        return balance;\n    }\n\n    public void deposit(double amount) {\n        if (amount &gt; 0) {\n            balance += amount;\n        }\n    }\n\n    public void withdraw(double amount) {\n        if (amount &gt; 0 &amp;&amp; amount &lt;= balance) {\n            balance -= amount;\n        }\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-56\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>balance<\/code>\u5909\u6570\u3092<code>private<\/code>\u306b\u3057\u3001\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3092\u9632\u3044\u3067\u3044\u307e\u3059\u3002<code>deposit<\/code>\u3068<code>withdraw<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u901a\u3058\u3066\u306e\u307f\u6b8b\u9ad8\u3092\u5909\u66f4\u3067\u304d\u3001\u4e0d\u6b63\u306a\u64cd\u4f5c\uff08\u4f8b\uff1a\u8ca0\u306e\u91d1\u984d\u306e\u5165\u91d1\uff09\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-57\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">3.2 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u52b9\u679c\u7684\u306a\u8a2d\u8a08<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-58\">\n<p>\u52b9\u679c\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u8a2d\u8a08\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-61\">\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\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/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-59\">\n<li>\u5358\u4e00\u8cac\u4efb\u306e\u539f\u5247\u3092\u5b88\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-60\">\n<li>\u30e1\u30bd\u30c3\u30c9\u306e\u7c92\u5ea6\u3092\u9069\u5207\u306b\u4fdd\u3064<\/li>\n<\/div>\n\n\n<li>\u660e\u78ba\u3067\u8aac\u660e\u7684\u306a\u540d\u524d\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/ol>\n<\/div><\/div>\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 Order {\n    private List&lt;Item&gt; items;\n    private double totalPrice;\n\n    public void addItem(Item item) {\n        items.add(item);\n        updateTotalPrice();\n    }\n\n    private void updateTotalPrice() {\n        totalPrice = items.stream()\n                          .mapToDouble(Item::getPrice)\n                          .sum();\n    }\n\n    public double getTotalPrice() {\n        return totalPrice;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-62\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>addItem<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u9805\u76ee\u306e\u8ffd\u52a0\u3068\u3044\u3046\u5358\u4e00\u306e\u8cac\u4efb\u3092\u6301\u3061\u3001\u4fa1\u683c\u306e\u66f4\u65b0\u306f\u5225\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30bd\u30c3\u30c9<code>updateTotalPrice<\/code>\u306b\u59d4\u8b72\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<h3 class=\"wp-block-heading\" id=\"i-11\">3.3 \u4e0d\u5909\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6d3b\u7528\u3068\u305d\u306e\u30e1\u30ea\u30c3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-64\">\n<p>\u4e0d\u5909\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u4e00\u5ea6\u4f5c\u6210\u3055\u308c\u308b\u3068\u72b6\u614b\u304c\u5909\u66f4\u3055\u308c\u306a\u3044\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4e88\u671f\u3057\u306a\u3044\u526f\u4f5c\u7528\u3092\u9632\u304e\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b89\u5168\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\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\">\u5b9f\u88c5\u65b9\u6cd5<\/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-65\">\n<li>\u30af\u30e9\u30b9\u3092<code>final<\/code>\u3068\u3057\u3066\u5ba3\u8a00\u3057\u3001\u7d99\u627f\u3092\u9632\u3050<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-66\">\n<li>\u3059\u3079\u3066\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092<code>private<\/code>\u3068<code>final<\/code>\u3067\u5ba3\u8a00\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-67\">\n<li>\u30bb\u30c3\u30bf\u30fc\u30e1\u30bd\u30c3\u30c9\u3092\u63d0\u4f9b\u3057\u306a\u3044<\/li>\n<\/div>\n\n\n<li>\u53ef\u5909\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u5bfe\u3057\u3066\u306f\u3001\u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc\u3092\u8fd4\u3059<\/li>\n<\/ol>\n<\/div><\/div>\n\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 ImmutablePerson {\n    private final String name;\n    private final int age;\n    private final List&lt;String&gt; hobbies;\n\n    public ImmutablePerson(String name, int age, List&lt;String&gt; hobbies) {\n        this.name = name;\n        this.age = age;\n        this.hobbies = new ArrayList&lt;&gt;(hobbies); \/\/ \u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public int getAge() {\n        return age;\n    }\n\n    public List&lt;String&gt; getHobbies() {\n        return new ArrayList&lt;&gt;(hobbies); \/\/ \u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc\u3092\u8fd4\u3059\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-70\">\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\">\u4e0d\u5909\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30ea\u30c3\u30c8<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-68\">\n<li>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\uff1a\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304b\u3089\u540c\u6642\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3082\u5b89\u5168<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-69\">\n<li>\u4e88\u6e2c\u53ef\u80fd\u6027\uff1a\u72b6\u614b\u304c\u5909\u308f\u3089\u306a\u3044\u305f\u3081\u3001\u52d5\u4f5c\u304c\u4e88\u6e2c\u3057\u3084\u3059\u3044<\/li>\n<\/div>\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u9069\u3057\u3066\u3044\u308b\uff1a\u72b6\u614b\u304c\u5909\u308f\u3089\u306a\u3044\u305f\u3081\u3001\u5b89\u5168\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u304d\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-71\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">3.4 \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u9069\u5207\u306a\u4f7f\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<p>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c1\u3064\u3060\u3051\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u904e\u5270\u306b\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30fc\u30c9\u306e\u7d50\u5408\u5ea6\u304c\u9ad8\u304f\u306a\u308a\u3001\u30c6\u30b9\u30c8\u304c\u56f0\u96e3\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u9069\u5207\u306a\u4f7f\u7528\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-73\">\n<p>\u5b9f\u88c5\u65b9\u6cd5\uff08\u9045\u5ef6\u521d\u671f\u5316\u3068\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u3092\u8003\u616e\uff09\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=\"\">public class Singleton {\n    private static volatile Singleton instance;\n\n    private Singleton() {}\n\n    public static Singleton getInstance() {\n        if (instance == null) {\n            synchronized (Singleton.class) {\n                if (instance == null) {\n                    instance = new Singleton();\n                }\n            }\n        }\n        return instance;\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-74\">\n<p>\u3053\u306e\u5b9f\u88c5\u306f\u3001\u30c0\u30d6\u30eb\u30c1\u30a7\u30c3\u30af\u30ed\u30c3\u30ad\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u304a\u308a\u3001\u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u74b0\u5883\u3067\u3082\u5b89\u5168\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-77\">\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\">\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762<\/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-75\">\n<li>\u8a2d\u5b9a\u7ba1\u7406<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-76\">\n<li>\u30ea\u30bd\u30fc\u30b9\u30d7\u30fc\u30eb<\/li>\n<\/div>\n\n\n<li>\u30ed\u30ae\u30f3\u30b0<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-78\">\n<h3 class=\"wp-block-heading\" id=\"i-13\">3.5 \u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-79\">\n<p>\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u7ba1\u7406\u304c\u91cd\u8981\u3067\u3059\u3002\u4e0d\u8981\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u9069\u5207\u306b\u7ba1\u7406\u3057\u3001\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-82\">\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\">\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/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-80\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d7\u30fc\u30ea\u30f3\u30b0\u306e\u4f7f\u7528<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-81\">\n<li>\u4e0d\u8981\u306b\u306a\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u53c2\u7167\u3092\u660e\u793a\u7684\u306b\u89e3\u653e<\/li>\n<\/div>\n\n\n<li><code>try-with-resources<\/code>\u6587\u306e\u4f7f\u7528\uff08AutoCloseable\u3092\u5b9f\u88c5\u3057\u305f\u30ea\u30bd\u30fc\u30b9\uff09<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-83\">\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d7\u30fc\u30ea\u30f3\u30b0\u306e\u4f8b\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=\"\">public class ConnectionPool {\n    private static final int MAX_POOL_SIZE = 10;\n    private final Queue&lt;Connection&gt; pool = new LinkedList&lt;&gt;();\n\n    public Connection getConnection() {\n        if (pool.isEmpty()) {\n            return createNewConnection();\n        } else {\n            return pool.poll();\n        }\n    }\n\n    public void releaseConnection(Connection conn) {\n        if (pool.size() &lt; MAX_POOL_SIZE) {\n            pool.offer(conn);\n        } else {\n            conn.close(); \/\/ \u5b9f\u969b\u306e\u63a5\u7d9a\u3092\u9589\u3058\u308b\u51e6\u7406\n        }\n    }\n\n    private Connection createNewConnection() {\n        \/\/ \u65b0\u3057\u3044\u63a5\u7d9a\u3092\u4f5c\u6210\u3059\u308b\u51e6\u7406\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-84\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u63a5\u7d9a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30d7\u30fc\u30eb\u3067\u7ba1\u7406\u3057\u3001\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u6e1b\u3089\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-85\">\n<p><strong>\u307e\u3068\u3081\uff1a<\/strong><br>\u3053\u308c\u3089\u306e5\u3064\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u5207\u306b\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044Java\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u7279\u306b\u3001\u3053\u308c\u3089\u306e\u539f\u5247\u3092\u5b88\u308b\u3053\u3068\u3067\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5411\u4e0a\u3001\u30d0\u30b0\u306e\u6e1b\u5c11\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a\u306a\u3069\u306e\u5229\u70b9\u304c\u5f97\u3089\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5404\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u306f\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u304c\u3042\u308b\u305f\u3081\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u3084\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306b\u5224\u65ad\u3057\u3001\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<h2 class=\"wp-block-heading\" id=\"i-14\">4. \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u30e1\u30e2\u30ea\u7ba1\u7406\uff1aJava\u306e\u88cf\u5074\u3092\u7406\u89e3\u3059\u308b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-87\">\n<p>Java\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406\u3068\u30e1\u30e2\u30ea\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u52b9\u7387\u7684\u3067\u5b89\u5b9a\u3057\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001Java\u306eVirtual Machine\uff08JVM\uff09\u304c\u3069\u306e\u3088\u3046\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6271\u3044\u3001\u30e1\u30e2\u30ea\u3092\u7ba1\u7406\u3057\u3066\u3044\u308b\u304b\u3092\u63a2\u6c42\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-88\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">4.1 JVM\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6271\u3044\uff1a\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u3068\u30b9\u30bf\u30c3\u30af\u30e1\u30e2\u30ea<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-89\">\n<p>JVM\u306f\u4e3b\u306b2\u3064\u306e\u91cd\u8981\u306a\u30e1\u30e2\u30ea\u9818\u57df\u3092\u4f7f\u7528\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7ba1\u7406\u3057\u307e\u3059\uff1a\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea\u3068\u30b9\u30bf\u30c3\u30af\u30e1\u30e2\u30ea\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-90\">\n<p>1. <strong>\u30d2\u30fc\u30d7\u30e1\u30e2\u30ea<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-91\">\n<p>\u3000\u25cf \u3059\u3079\u3066\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\uff09\u304c\u683c\u7d0d\u3055\u308c\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<p>\u3000\u25cf \u52d5\u7684\u306b\u78ba\u4fdd\u3055\u308c\u3001\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5bfe\u8c61\u3068\u306a\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\n<p>\u3000\u25cf \u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u3067\u5171\u6709\u3055\u308c\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-94\">\n<p>2. <strong>\u30b9\u30bf\u30c3\u30af\u30e1\u30e2\u30ea<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-95\">\n<p>\u3000\u25cf \u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u3068\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\u7ba1\u7406\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<p>\u3000\u25cf \u5404\u30b9\u30ec\u30c3\u30c9\u306b\u56fa\u6709\u306e\u3082\u306e\u3067\u3001\u4ed6\u306e\u30b9\u30ec\u30c3\u30c9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\n<p>\u3000\u25cf LIFO\uff08Last In First Out\uff09\u65b9\u5f0f\u3067\u52d5\u4f5c\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\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=\"\">public void createPerson() {\n    int age = 30;\n    Person person = new Person(\"John\", age);\n    person.sayHello();\n}<\/pre>\n\n\n<div id=\"sgb-css-id-99\">\n<p>\u3000\u3053\u306e\u30b3\u30fc\u30c9\u304c\u5b9f\u884c\u3055\u308c\u308b\u3068<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-100\">\n<p>\u3000\u3000\u25cf <code>age<\/code>\u5909\u6570\u306f\u30b9\u30bf\u30c3\u30af\u306b\u4fdd\u5b58\u3055\u308c\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-101\">\n<p>\u3000\u3000\u25cf <code>new Person(\"John\", age)<\/code>\u3067\u4f5c\u6210\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u30d2\u30fc\u30d7\u306b\u4fdd\u5b58\u3055\u308c\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<p>\u3000\u3000\u25cf <code>person<\/code>\u5909\u6570\u81ea\u4f53\u306f\u30b9\u30bf\u30c3\u30af\u306b\u4fdd\u5b58\u3055\u308c\u308b\u304c\u3001\u3053\u308c\u306f\u30d2\u30fc\u30d7\u4e0a\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3078\u306e\u53c2\u7167\uff08\u30a2\u30c9\u30ec\u30b9\uff09\u3092\u6301\u3064<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">4.2 \u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-104\">\n<p>\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\uff08GC\uff09\u306f\u3001\u4e0d\u8981\u306b\u306a\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u81ea\u52d5\u7684\u306b\u56de\u53ce\u3057\u3001\u30e1\u30e2\u30ea\u3092\u89e3\u653e\u3059\u308bJVM\u306e\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<p>1. <strong>\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-106\">\n<p>\u3000\u25cf \u5230\u9054\u53ef\u80fd\u6027\u89e3\u6790\uff1a\u30eb\u30fc\u30c8\uff08\u30b9\u30bf\u30c3\u30af\u4e0a\u306e\u5909\u6570\u3001\u9759\u7684\u30d5\u30a3\u30fc\u30eb\u30c9\u306a\u3069\uff09\u304b\u3089\u8fbf\u308c\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7279\u5b9a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-107\">\n<p>\u3000\u25cf \u672a\u5230\u9054\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4e0d\u8981\u3068\u5224\u65ad\u3057\u3001\u56de\u53ce\u3059\u308b<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-108\">\n<p>2. <strong>\u4e16\u4ee3\u5225GC<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-109\">\n<p>\u3000\u25cf Young Generation\uff08Eden, Survivor spaces\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<p>\u3000\u25cf Old Generation<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<p>3. <strong>GC\u306e\u30bf\u30a4\u30d7<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-112\">\n<p>\u3000\u25cf Minor GC\uff1aYoung Generation\u3067\u884c\u308f\u308c\u308b\u6bd4\u8f03\u7684\u9ad8\u901f\u306aGC<\/p>\n<\/div>\n\n\n<p>\u3000\u25cf Major GC\uff08Full GC\uff09\uff1a\u5168\u30d2\u30fc\u30d7\u9818\u57df\u3092\u5bfe\u8c61\u3068\u3059\u308b\u3001\u6642\u9593\u306e\u304b\u304b\u308bGC<\/p>\n\n\n<div id=\"sgb-css-id-116\">\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\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb<\/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-113\">\n<li>\u751f\u6210\uff1a<code>new<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u306b\u3088\u308a\u30d2\u30fc\u30d7\u4e0a\u306b\u4f5c\u6210\u3055\u308c\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<li>\u4f7f\u7528\uff1a\u30d7\u30ed\u30b0\u30e9\u30e0\u304b\u3089\u53c2\u7167\u3055\u308c\u3001\u4f7f\u7528\u3055\u308c\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-115\">\n<li>\u5230\u9054\u4e0d\u53ef\u80fd\uff1a\u3069\u306e\u5909\u6570\u304b\u3089\u3082\u53c2\u7167\u3055\u308c\u306a\u304f\u306a\u308b<\/li>\n<\/div>\n\n\n<li>\u56de\u53ce\uff1a\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30bf\u306b\u3088\u308a\u56de\u53ce\u3055\u308c\u308b<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<h3 class=\"wp-block-heading\" id=\"i-17\">4.3 \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u305f\u3081\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-118\">\n<p>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306f\u3001\u4e0d\u8981\u306b\u306a\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u89e3\u653e\u3055\u308c\u305a\u306b\u30e1\u30e2\u30ea\u3092\u5360\u6709\u3057\u7d9a\u3051\u308b\u554f\u984c\u3067\u3059\u3002Java\u3067\u306f\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u3042\u308b\u305f\u3081\u3001C\u8a00\u8a9e\u306a\u3069\u3068\u6bd4\u3079\u3066\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306f\u8d77\u3053\u308a\u306b\u304f\u3044\u3067\u3059\u304c\u3001\u5b8c\u5168\u306b\u9632\u3052\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-119\">\n<p><strong>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u30c6\u30af\u30cb\u30c3\u30af<\/strong>\uff1a<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-120\">\n<p>\u30001. \u5f37\u53c2\u7167\u3001\u5f31\u53c2\u7167\u3001\u30bd\u30d5\u30c8\u53c2\u7167\u3001\u30d5\u30a1\u30f3\u30c8\u30e0\u53c2\u7167\u306e\u9069\u5207\u306a\u4f7f\u7528<\/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=\"\">   \/\/ \u5f37\u53c2\u7167\uff08\u901a\u5e38\u306e\u53c2\u7167\uff09\n   Object strongRef = new Object();\n\n   \/\/ \u5f31\u53c2\u7167\n   WeakReference&lt;Object&gt; weakRef = new WeakReference&lt;&gt;(new Object());\n\n   \/\/ \u30bd\u30d5\u30c8\u53c2\u7167\n   SoftReference&lt;Object&gt; softRef = new SoftReference&lt;&gt;(new Object());<\/pre>\n\n\n<div id=\"sgb-css-id-121\">\n<p>\u3000\u3000\u5f31\u53c2\u7167\u3084\u30bd\u30d5\u30c8\u53c2\u7167\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30e2\u30ea\u304c\u903c\u8feb\u3057\u305f\u969b\u306b\u67d4\u8edf\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u89e3\u653e\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-122\">\n<p>\u30002. \u30af\u30ed\u30fc\u30b8\u30e3\u30fc\u3068\u30e1\u30e2\u30ea\u30ea\u30fc\u30af<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<p>\u3000\u3000\u533f\u540d\u5185\u90e8\u30af\u30e9\u30b9\u3084\u30e9\u30e0\u30c0\u5f0f\u3067\u5916\u90e8\u5909\u6570\u3092\u53c2\u7167\u3059\u308b\u969b\u3001\u610f\u56f3\u305b\u305a\u9577\u5bff\u547d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u53c2\u7167\u3092\u4f5c\u6210\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5fc5\u8981\u6700\u5c0f\u9650\u306e\u5909\u6570\u306e\u307f\u3092\u53c2\u7167\u3059\u308b\u3088\u3046\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-124\">\n<p>\u30003. \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30af\u30e9\u30b9\u306e\u9069\u5207\u306a\u4f7f\u7528<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-125\">\n<p>\u3000\u3000\u4e0d\u8981\u306b\u306a\u3063\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304b\u3089\u78ba\u5b9f\u306b\u524a\u9664\u3057\u307e\u3059\u3002\u7279\u306b\u3001\u30ab\u30b9\u30bf\u30e0\u30ad\u30fc\u3092\u4f7f\u7528\u3059\u308b<code>HashMap<\/code>\u306a\u3069\u3067\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-126\">\n<p>\u30004. \u30ea\u30bd\u30fc\u30b9\u306e\u9069\u5207\u306a\u30af\u30ed\u30fc\u30ba<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-127\">\n<p>\u3000\u3000<code>try-with-resources<\/code>\u6587\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u30cf\u30f3\u30c9\u30eb\u3084\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u306a\u3069\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u78ba\u5b9f\u306b\u30af\u30ed\u30fc\u30ba\u3057\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=\"\">   try (FileInputStream fis = new FileInputStream(\"file.txt\")) {\n       \/\/ \u30d5\u30a1\u30a4\u30eb\u306e\u51e6\u7406\n   } catch (IOException e) {\n       e.printStackTrace();\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-128\">\n<p>\u3000\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u77e5\u8b58\u3092\u6d3b\u7528\u3057\u3066\u3001\u4ee5\u4e0b\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-129\">\n<p>\u3000\u25cf \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\uff08GC\u30ed\u30b0\u306e\u89e3\u6790\u3001\u30d2\u30fc\u30d7\u30c0\u30f3\u30d7\u306e\u8abf\u67fb\u306a\u3069\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<p>\u3000\u25cf \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u8abf\u67fb\u3068\u4fee\u6b63<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-131\">\n<p>\u3000\u25cf \u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8a2d\u8a08\uff08\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u8003\u616e\u3057\u305f\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u8a2d\u8a08\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-132\">\n<p>Java\u306e\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u3067\u5b89\u5b9a\u3057\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u767a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u904e\u5ea6\u306b\u6700\u9069\u5316\u306b\u8d70\u3089\u305a\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-133\">\n<h2 class=\"wp-block-heading\" id=\"i-18\">5. \u5b9f\u8df5\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u6d3b\u7528\u4f8b\uff1a\u30b3\u30fc\u30c9\u89e3\u8aac\u4ed8\u304d<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-134\">\n<p>\u3053\u306e\u7ae0\u3067\u306f\u3001\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a\u3067\u3088\u304f\u906d\u9047\u3059\u308b\u5834\u9762\u3092\u60f3\u5b9a\u3057\u3001Java\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u65b9\u6cd5\u3092\u5177\u4f53\u7684\u306a\u30b3\u30fc\u30c9\u4f8b\u3068\u3068\u3082\u306b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-135\">\n<h3 class=\"wp-block-heading\" id=\"i-19\">5.1 \u30c7\u30fc\u30bf\u7ba1\u7406\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u6d3b\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-136\">\n<p>\u30c7\u30fc\u30bf\u7ba1\u7406\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001DAO\u30d1\u30bf\u30fc\u30f3\uff08Data Access Object\uff09\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u306e\u6c38\u7d9a\u5316\u5c64\u3092\u62bd\u8c61\u5316\u3059\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u7c21\u5358\u306aDAO\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\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=\"\">\/\/ \u30e6\u30fc\u30b6\u30fc\u30e2\u30c7\u30eb\npublic class User {\n    private int id;\n    private String name;\n    private String email;\n\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3001getter\u3001setter\u306f\u7701\u7565\n}\n\n\/\/ DAO\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\npublic interface UserDao {\n    User getUser(int id);\n    void saveUser(User user);\n    void updateUser(User user);\n    void deleteUser(int id);\n}\n\n\/\/ DAO\u306e\u5b9f\u88c5\npublic class UserDaoImpl implements UserDao {\n    private Map&lt;Integer, User&gt; usersDb = new HashMap&lt;&gt;();\n\n    @Override\n    public User getUser(int id) {\n        return usersDb.get(id);\n    }\n\n    @Override\n    public void saveUser(User user) {\n        usersDb.put(user.getId(), user);\n    }\n\n    @Override\n    public void updateUser(User user) {\n        usersDb.put(user.getId(), user);\n    }\n\n    @Override\n    public void deleteUser(int id) {\n        usersDb.remove(id);\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-137\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>User<\/code>\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f7f\u3063\u3066\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u8868\u73fe\u3057\u3001<code>UserDaoImpl<\/code>\u30af\u30e9\u30b9\u3067\u305d\u308c\u3089\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7ba1\u7406\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>HashMap<\/code>\u306e\u4ee3\u308f\u308a\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u57fa\u672c\u7684\u306a\u8003\u3048\u65b9\u306f\u540c\u3058\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-138\">\n<h3 class=\"wp-block-heading\" id=\"i-20\">5.2 \u4e26\u5217\u51e6\u7406\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<p>\u4e26\u5217\u51e6\u7406\u3092\u884c\u3046\u969b\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5171\u6709\u3068\u540c\u671f\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3068<code>ExecutorService<\/code>\u3092\u4f7f\u7528\u3057\u305f\u30bf\u30b9\u30af\u51e6\u7406\u306e\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=\"\">import java.util.concurrent.ExecutorService;\nimport java.util.concurrent.Executors;\n\npublic class TaskManager {\n    private static volatile TaskManager instance;\n    private ExecutorService executorService;\n\n    private TaskManager() {\n        executorService = Executors.newFixedThreadPool(5);\n    }\n\n    public static TaskManager getInstance() {\n        if (instance == null) {\n            synchronized (TaskManager.class) {\n                if (instance == null) {\n                    instance = new TaskManager();\n                }\n            }\n        }\n        return instance;\n    }\n\n    public void executeTask(Runnable task) {\n        executorService.submit(task);\n    }\n\n    public void shutdown() {\n        executorService.shutdown();\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\npublic class Main {\n    public static void main(String[] args) {\n        TaskManager taskManager = TaskManager.getInstance();\n\n        for (int i = 0; i &lt; 10; i++) {\n            final int taskId = i;\n            taskManager.executeTask(() -&gt; {\n                System.out.println(\"Executing task \" + taskId);\n            });\n        }\n\n        taskManager.shutdown();\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-140\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>TaskManager<\/code>\u30af\u30e9\u30b9\u304c\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u3067\u4e00\u3064\u306e<code>ExecutorService<\/code>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7ba1\u7406\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ea\u30bd\u30fc\u30b9\u306e\u52b9\u7387\u7684\u306a\u4f7f\u7528\u3068\u4e26\u5217\u30bf\u30b9\u30af\u306e\u7c21\u5358\u306a\u5b9f\u884c\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<h3 class=\"wp-block-heading\" id=\"i-21\">5.3 \u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u8a2d\u8a08\u306e\u5b9f\u4f8b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-142\">\n<p>\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u8a2d\u8a08\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u3068\u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\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=\"\">\/\/ \u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\ninterface Product {\n    void use();\n}\n\nclass ConcreteProductA implements Product {\n    public void use() {\n        System.out.println(\"Using Product A\");\n    }\n}\n\nclass ConcreteProductB implements Product {\n    public void use() {\n        System.out.println(\"Using Product B\");\n    }\n}\n\nabstract class Creator {\n    abstract Product createProduct();\n\n    void someOperation() {\n        Product product = createProduct();\n        product.use();\n    }\n}\n\nclass ConcreteCreatorA extends Creator {\n    Product createProduct() {\n        return new ConcreteProductA();\n    }\n}\n\nclass ConcreteCreatorB extends Creator {\n    Product createProduct() {\n        return new ConcreteProductB();\n    }\n}\n\n\/\/ \u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u30d1\u30bf\u30fc\u30f3\ninterface Observer {\n    void update(String message);\n}\n\nclass ConcreteObserver implements Observer {\n    private String name;\n\n    ConcreteObserver(String name) {\n        this.name = name;\n    }\n\n    public void update(String message) {\n        System.out.println(name + \" received message: \" + message);\n    }\n}\n\nclass Subject {\n    private List&lt;Observer&gt; observers = new ArrayList&lt;&gt;();\n\n    public void addObserver(Observer observer) {\n        observers.add(observer);\n    }\n\n    public void notifyObservers(String message) {\n        for (Observer observer : observers) {\n            observer.update(message);\n        }\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\npublic class Main {\n    public static void main(String[] args) {\n        \/\/ \u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u306e\u4f7f\u7528\n        Creator creatorA = new ConcreteCreatorA();\n        creatorA.someOperation();\n\n        Creator creatorB = new ConcreteCreatorB();\n        creatorB.someOperation();\n\n        \/\/ \u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u4f7f\u7528\n        Subject subject = new Subject();\n        subject.addObserver(new ConcreteObserver(\"Observer 1\"));\n        subject.addObserver(new ConcreteObserver(\"Observer 2\"));\n        subject.notifyObservers(\"Hello, observers!\");\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-143\">\n<p>\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u306e\u30ed\u30b8\u30c3\u30af\u3092\u30b5\u30d6\u30af\u30e9\u30b9\u306b\u59d4\u306d\u308b\u3053\u3068\u3067\u3001\u67d4\u8edf\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u30d1\u30bf\u30fc\u30f3\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u9593\u306e\u758e\u7d50\u5408\u306a\u901a\u77e5\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-144\">\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u901a\u3058\u3066\u3001Java\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u3092\u5b66\u3076\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u57fa\u790e\u3068\u3057\u3066\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<p>\u8aad\u8005\u306e\u7686\u3055\u3093\u3078\u306e\u30d2\u30f3\u30c8\u3068\u3057\u3066\u3001\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u81ea\u8eab\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u9069\u7528\u3059\u308b\u969b\u306f\u3001\u904e\u5ea6\u306b\u8907\u96d1\u5316\u3057\u306a\u3044\u3088\u3046\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002\u30b7\u30f3\u30d7\u30eb\u3067\u7406\u89e3\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u5fc3\u304c\u3051\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3092\u884c\u3046\u3053\u3068\u304c\u3001\u9577\u671f\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u6210\u529f\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\n<h2 class=\"wp-block-heading\" id=\"i-22\">6. Java 17\u4ee5\u964d\u306e\u65b0\u6a5f\u80fd\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\uff1a\u6700\u65b0\u30c8\u30ec\u30f3\u30c9<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-147\">\n<p>Java\u8a00\u8a9e\u306f\u7d99\u7d9a\u7684\u306b\u9032\u5316\u3092\u7d9a\u3051\u3066\u304a\u308a\u3001Java 17\u4ee5\u964d\u306b\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406\u3068\u64cd\u4f5c\u3092\u5927\u304d\u304f\u6539\u5584\u3059\u308b\u65b0\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u304c\u3069\u306e\u3088\u3046\u306b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6271\u3044\u3092\u5909\u9769\u3059\u308b\u304b\u3092\u63a2\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-148\">\n<h3 class=\"wp-block-heading\" id=\"i-23\">6.1 \u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u306b\u3088\u308b\u7c21\u6f54\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5b9a\u7fa9<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-149\">\n<p>\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u306f\u3001\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u30c7\u30fc\u30bf\u4fdd\u6301\u30af\u30e9\u30b9\u3092\u7c21\u6f54\u306b\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u306e\u65b0\u3057\u3044\u8a00\u8a9e\u6a5f\u80fd\u3067\u3059\u3002Java 14\u3067\u5c0e\u5165\u3055\u308c\u3001Java 16\u3067\u6b63\u5f0f\u6a5f\u80fd\u3068\u3057\u3066\u63a1\u7528\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-150\">\n<p><strong>\u5f93\u6765\u306e\u65b9\u6cd5<\/strong>\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=\"\">public class Person {\n    private final String name;\n    private final int age;\n\n    public Person(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    public String getName() { return name; }\n    public int getAge() { return age; }\n\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (o == null || getClass() != o.getClass()) return false;\n        Person person = (Person) o;\n        return age == person.age &amp;&amp; Objects.equals(name, person.name);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hash(name, age);\n    }\n\n    @Override\n    public String toString() {\n        return \"Person{name='\" + name + \"', age=\" + age + \"}\";\n    }\n}<\/pre>\n\n\n<div id=\"sgb-css-id-151\">\n<p><strong>\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u305f\u65b9\u6cd5<\/strong>\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=\"\">public record Person(String name, int age) {}<\/pre>\n\n\n<div id=\"sgb-css-id-152\">\n<p>\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3001getter\u3001<code>equals<\/code>\u3001<code>hashCode<\/code>\u3001<code>toString<\/code>\u30e1\u30bd\u30c3\u30c9\u304c\u81ea\u52d5\u7684\u306b\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30dc\u30a4\u30e9\u30fc\u30d7\u30ec\u30fc\u30c8\u30b3\u30fc\u30c9\u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-155\">\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\"><strong>\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u306e\u7279\u5fb4<\/strong><\/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-153\">\n<li>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff1a\u3059\u3079\u3066\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u6697\u9ed9\u7684\u306b<code>final<\/code><\/li>\n<\/div>\n\n<div id=\"sgb-css-id-154\">\n<li>\u5024\u30d9\u30fc\u30b9\uff1a\u4e3b\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528<\/li>\n<\/div>\n\n\n<li>\u7d99\u627f\u4e0d\u53ef\uff1a\u6697\u9ed9\u7684\u306b<code>final<\/code>\u30af\u30e9\u30b9<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-156\">\n<p>\u5b9f\u969b\u306e\u958b\u767a\u3067\u306f\u3001DTOs\uff08Data Transfer Objects\uff09\u3084\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u5024\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5b9a\u7fa9\u306b\u7279\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-157\">\n<h3 class=\"wp-block-heading\" id=\"i-24\">6.2 \u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u3092\u7528\u3044\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u578b\u5b89\u5168\u6027\u5411\u4e0a<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-158\">\n<p>\u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u306f\u3001\u30af\u30e9\u30b9\u968e\u5c64\u3092\u660e\u793a\u7684\u306b\u5236\u5fa1\u3059\u308b\u305f\u3081\u306e\u6a5f\u80fd\u3067\u3001Java 15\u3067\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u3068\u3057\u3066\u5c0e\u5165\u3055\u308c\u3001Java 17\u3067\u6b63\u5f0f\u306b\u63a1\u7528\u3055\u308c\u307e\u3057\u305f\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=\"\">public sealed class Shape\n    permits Circle, Rectangle, Square {\n    \/\/ \u5171\u901a\u306e\u30e1\u30bd\u30c3\u30c9\u3084\u5c5e\u6027\n}\n\npublic final class Circle extends Shape {\n    \/\/ Circle\u306e\u5b9f\u88c5\n}\n\npublic non-sealed class Rectangle extends Shape {\n    \/\/ Rectangle\u306e\u5b9f\u88c5\n}\n\npublic final class Square extends Rectangle {\n    \/\/ Square\u306e\u5b9f\u88c5\n}<\/pre>\n\n\n<div id=\"sgb-css-id-161\">\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\"><strong>\u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u306e\u7279\u5fb4<\/strong><\/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-159\">\n<li>\u30af\u30e9\u30b9\u968e\u5c64\u306e\u660e\u793a\u7684\u306a\u5236\u5fa1<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-160\">\n<li>\u578b\u306e\u5b89\u5168\u6027\u306e\u5411\u4e0a<\/li>\n<\/div>\n\n\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u306e\u76f8\u6027\u304c\u826f\u3044<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-162\">\n<p>\u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u306f\u3001\u7279\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u30e2\u30c7\u30eb\u3084\u8a2d\u8a08\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u6642\u306b\u3001\u30af\u30e9\u30b9\u968e\u5c64\u3092\u660e\u78ba\u306b\u5b9a\u7fa9\u3057\u3001\u4e88\u671f\u3057\u306a\u3044\u62e1\u5f35\u3092\u9632\u3050\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-163\">\n<h3 class=\"wp-block-heading\" id=\"i-25\">6.3 \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u3088\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u64cd\u4f5c\u306e\u7c21\u7d20\u5316<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-164\">\n<p>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306f\u3001Java 14\u304b\u3089\u6bb5\u968e\u7684\u306b\u5c0e\u5165\u3055\u308c\u3066\u3044\u308b\u6a5f\u80fd\u3067\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u578b\u30c1\u30a7\u30c3\u30af\u3068\u5909\u6570\u5272\u308a\u5f53\u3066\u3092\u7c21\u7d20\u5316\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-165\">\n<p>1. <code>instanceof<\/code>\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\uff08Java 16\u3067\u6b63\u5f0f\u6a5f\u80fd\u5316\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-166\">\n<p>\u3000\u5f93\u6765\u306e\u65b9\u6cd5\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=\"\">if (obj instanceof String) {\n    String s = (String) obj;\n    \/\/ s\u3092\u4f7f\u7528\u3059\u308b\u51e6\u7406\n}<\/pre>\n\n\n<div id=\"sgb-css-id-167\">\n<p>\u3000\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u305f\u65b9\u6cd5\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=\"\">if (obj instanceof String s) {\n    \/\/ s\u3092\u76f4\u63a5\u4f7f\u7528\u3067\u304d\u308b\n}<\/pre>\n\n\n<div id=\"sgb-css-id-168\">\n<p>2. <code>switch<\/code>\u5f0f\u3067\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\uff08Java 17\u3067\u30d7\u30ec\u30d3\u30e5\u30fc\u6a5f\u80fd\u3068\u3057\u3066\u5c0e\u5165\uff09<\/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 String getShapeDescription(Shape shape) {\n    return switch (shape) {\n        case Circle c    -&gt; \"\u5186\u306e\u534a\u5f84: \" + c.getRadius();\n        case Rectangle r -&gt; \"\u9577\u65b9\u5f62\u306e\u5e45: \" + r.getWidth() + \", \u9ad8\u3055: \" + r.getHeight();\n        case Square s    -&gt; \"\u6b63\u65b9\u5f62\u306e\u4e00\u8fba: \" + s.getSide();\n        default          -&gt; \"\u4e0d\u660e\u306a\u56f3\u5f62\";\n    };\n}<\/pre>\n\n\n<div id=\"sgb-css-id-171\">\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\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-169\">\n<li>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\u3068\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-170\">\n<li>\u578b\u30c1\u30a7\u30c3\u30af\u3068\u5909\u6570\u5272\u308a\u5f53\u3066\u306e\u7d71\u5408<\/li>\n<\/div>\n\n\n<li><code>switch<\/code>\u5f0f\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u5f37\u529b\u306a\u5206\u5c90\u51e6\u7406<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-172\">\n<p>\u5b9f\u969b\u306e\u958b\u767a\u3067\u306f\u3001\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u3084\u578b\u306b\u57fa\u3065\u304f\u51e6\u7406\u3092\u884c\u3046\u969b\u306b\u3001\u30b3\u30fc\u30c9\u306e\u7c21\u7d20\u5316\u3068\u4fdd\u5b88\u6027\u306e\u5411\u4e0a\u306b\u5927\u304d\u304f\u8ca2\u732e\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-173\">\n<p>\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u306f\u3001Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6271\u3044\u3092\u5927\u304d\u304f\u6539\u5584\u3057\u307e\u3059\u3002\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u306b\u3088\u308b\u30c7\u30fc\u30bf\u30af\u30e9\u30b9\u306e\u7c21\u6f54\u306a\u5b9a\u7fa9\u3001\u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u306b\u3088\u308b\u578b\u968e\u5c64\u306e\u660e\u793a\u7684\u306a\u5236\u5fa1\u3001\u305d\u3057\u3066\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u3088\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u64cd\u4f5c\u306e\u7c21\u7d20\u5316\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3001\u578b\u5b89\u5168\u6027\u3001\u305d\u3057\u3066\u8868\u73fe\u529b\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-174\">\n<p>\u6700\u65b0\u306eJava\u6a5f\u80fd\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u65b0\u6a5f\u80fd\u306e\u5c0e\u5165\u306b\u5f53\u305f\u3063\u3066\u306f\u3001\u30c1\u30fc\u30e0\u306e\u7fd2\u719f\u5ea6\u3084\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u3092\u8003\u616e\u3057\u3001\u6bb5\u968e\u7684\u306b\u63a1\u7528\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-175\">\n<h2 class=\"wp-block-heading\" id=\"i-26\">7. \u307e\u3068\u3081\uff1aJava\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-176\">\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Java\u306b\u304a\u3051\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6982\u5ff5\u304b\u3089\u6700\u65b0\u306e\u30c8\u30ec\u30f3\u30c9\u307e\u3067\u3001\u5e45\u5e83\u304f\u30ab\u30d0\u30fc\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u3053\u3067\u3001\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u632f\u308a\u8fd4\u308a\u3001Java\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30de\u30b9\u30bf\u30fc\u3078\u306e\u9053\u7b4b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-177\">\n<h3 class=\"wp-block-heading\" id=\"i-27\">7.1 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u4f7f\u7528\u306e \u30dd\u30a4\u30f3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-183\">\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\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u4f7f\u7528\u306e \u30dd\u30a4\u30f3\u30c8<\/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-178\">\n<li><strong>\u57fa\u672c\u3092\u62bc\u3055\u3048\u308b<\/strong>\uff1a \u30af\u30e9\u30b9\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u95a2\u4fc2\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u3068\u30af\u30e9\u30b9\u5909\u6570\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u57fa\u790e\u3068\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-179\">\n<li><strong>\u9069\u5207\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210<\/strong>\uff1a \u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u3001\u6a19\u6e96\u7684\u306a<code>new<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3001\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u3001\u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u306a\u3069\u3001\u9069\u5207\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u65b9\u6cd5\u3092\u9078\u629e\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-180\">\n<li><strong>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9075\u5b88<\/strong>\uff1a \u30ab\u30d7\u30bb\u30eb\u5316\u3001\u4e0d\u5909\u6027\u306e\u6d3b\u7528\u3001\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u306e\u9069\u5207\u306a\u4f7f\u7528\u306a\u3069\u3001\u52b9\u679c\u7684\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406\u306e\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u610f\u8b58\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-181\">\n<li><strong>\u30e1\u30e2\u30ea\u7ba1\u7406\u3092\u7406\u89e3\u3059\u308b<\/strong>\uff1a JVM\u306e\u30e1\u30e2\u30ea\u69cb\u9020\u3068\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u7406\u89e3\u3057\u3001\u52b9\u7387\u7684\u306a\u30e1\u30e2\u30ea\u4f7f\u7528\u3092\u5fc3\u304c\u3051\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-182\">\n<li><strong>\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/strong>\uff1a \u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u3001\u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u3001DAO\u306a\u3069\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u9078\u629e\u3057\u3001\u67d4\u8edf\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u65b0\u6a5f\u80fd\u3092\u7a4d\u6975\u7684\u306b\u6d3b\u7528<\/strong>\uff1a \u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u3001\u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306a\u3069\u3001Java\u306e\u65b0\u6a5f\u80fd\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u7c21\u6f54\u3067\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-184\">\n<h3 class=\"wp-block-heading\" id=\"i-28\">7.2 \u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a2\u30a4\u30c7\u30a2<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-185\">\n<p>Java\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u7406\u89e3\u3092\u3055\u3089\u306b\u6df1\u3081\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a2\u30a4\u30c7\u30a2\u3092\u63d0\u6848\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-186\">\n<p>1. <strong>\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-187\">\n<p>\u3000\u25cf \u66f8\u7c4d\uff1a \u201cEffective Java\u201d by Joshua Bloch<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-188\">\n<p>\u3000\u25cf \u30aa\u30f3\u30e9\u30a4\u30f3\u30b3\u30fc\u30b9\uff1a Coursera or Udemy \u306e Java \u4e2d\u7d1a\u301c\u4e0a\u7d1a\u30b3\u30fc\u30b9<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-189\">\n<p>\u3000\u25cf \u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff1a Oracle Java Documentation<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-190\">\n<p>\u3000\u25cf \u30b3\u30df\u30e5\u30cb\u30c6\u30a3\uff1a Stack Overflow, Java Reddit community<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-191\">\n<p>2. <strong>\u5b9f\u8df5\u7684\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30a2\u30a4\u30c7\u30a2<\/strong><\/p>\n<\/div>\n\n<div id=\"sgb-css-id-192\">\n<p>\u3000\u25cf \u5c0f\u898f\u6a21\u306a\u5728\u5eab\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306e\u958b\u767a\uff08DAO\u30d1\u30bf\u30fc\u30f3\u3001\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u3001\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u306e\u6d3b\u7528\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-193\">\n<p>\u3000\u25cf \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u305f\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff08\u4e26\u5217\u51e6\u7406\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u7ba1\u7406\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-194\">\n<p>\u3000\u25cf \u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3057\u305f\u30b2\u30fc\u30e0\u30a8\u30f3\u30b8\u30f3\u306e\u958b\u767a\uff08\u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u3001\u30b9\u30c6\u30fc\u30c8\u3001\u30b3\u30de\u30f3\u30c9\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-195\">\n<p>\u3000\u25cf Java 17\u306e\u65b0\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u305f\u30c7\u30fc\u30bf\u51e6\u7406\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff08\u30ec\u30b3\u30fc\u30c9\u3001\u30b7\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u6d3b\u7528\uff09<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-196\">\n<p>\u3053\u308c\u3089\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u901a\u3058\u3066\u3001\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u6982\u5ff5\u3092\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u306b\u843d\u3068\u3057\u8fbc\u3080\u7d4c\u9a13\u3092\u7a4d\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div 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