{"id":1175,"date":"2025-03-24T08:52:41","date_gmt":"2025-03-23T23:52:41","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1175"},"modified":"2025-03-24T08:52:41","modified_gmt":"2025-03-23T23:52:41","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%e3%80%91google%e3%81%aeguava%e3%83%a9%e3%82%a4%e3%83%96%e3%83%a9%e3%83%aa%e3%81%a7%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b7%e3%81%a4%e3%81%ae","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1175","title":{"rendered":"\u3010\u5b8c\u5168\u30ac\u30a4\u30c9\u3011Google\u306eGuava\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u5b9f\u73fe\u3059\u308b7\u3064\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3068\u5b9f\u8df5\u7684\u306a\u6d3b\u7528\u6cd5"},"content":{"rendered":"\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\">Guava\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306f\uff1f\u305d\u306e\u7279\u5fb4\u3068\u91cd\u8981\u6027<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">Google\u304c\u958b\u767a\u3057\u305f\u4fe1\u983c\u6027\u306e\u9ad8\u3044Java\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e9\u30a4\u30d6\u30e9\u30ea<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u5f93\u6765\u306eJava\u306e\u8ab2\u984c\u3092\u89e3\u6c7a\u3059\u308b\u9769\u65b0\u7684\u306a\u6a5f\u80fd\u7fa4<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">Guava\u3092\u5c0e\u5165\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u958b\u767a\u52b9\u7387\u304c3\u500d\u5411\u4e0a\u3059\u308b\u4fbf\u5229\u6a5f\u80fd\u306e\u6570\u3005<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">\u30d0\u30b0\u309280%\u524a\u6e1b\u3067\u304d\u308b\u5805\u5b9f\u306a\u5b9f\u88c5\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">Guava\u306e\u4e3b\u8981\u6a5f\u80fd\u3068\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u64cd\u4f5c\u3092\u7c21\u5358\u306b\u66f8\u304fCollections\u6a5f\u80fd<\/a>      <\/li>      <li>        <a href=\"#i-8\">NullPointerException\u5bfe\u7b56\u306b\u6709\u52b9\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u6a5f\u80fd<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\u3092\u7c21\u5358\u306b\u3059\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u80fd<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">Guava\u306b\u3088\u308b\u30b3\u30fc\u30c9\u54c1\u8cea\u5411\u4e0a\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9\u3067\u5b9f\u73fe\u3059\u308b\u5b89\u5168\u306a\u5b9f\u88c5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u524d\u63d0\u6761\u4ef6\u306b\u3088\u308b\u5805\u5b9f\u306a\u4e8b\u524d\u6761\u4ef6\u30c1\u30a7\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">\u5b9f\u8df5Guava\u306e\u6d3b\u7528\u4f8b\u3068\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u306e\u6d3b\u7528\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-16\">Guava\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u6642\u306e\u4e92\u63db\u6027\u5bfe\u5fdc\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-19\">Guava\u306e\u5c06\u6765\u6027\u3068\u4ee3\u66ff\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306e\u6bd4\u8f03<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">Java\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306e\u6a5f\u80fd\u6bd4\u8f03<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">Apache Commons\u7b49\u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u306e\u6bd4\u8f03<\/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\">Guava\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306f\uff1f\u305d\u306e\u7279\u5fb4\u3068\u91cd\u8981\u6027<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">Google\u304c\u958b\u767a\u3057\u305f\u4fe1\u983c\u6027\u306e\u9ad8\u3044Java\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e9\u30a4\u30d6\u30e9\u30ea<\/h3>\n\n\n\n<p>Guava\u306f\u3001Google\u304c\u793e\u5185\u306eJava\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u5411\u3051\u306b\u958b\u767a\u3057\u3001\u5f8c\u306b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u5316\u3057\u305f\u5f37\u529b\u306a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u30022007\u5e74\u306e\u521d\u671f\u30ea\u30ea\u30fc\u30b9\u4ee5\u6765\u3001Google\u306e\u591a\u304f\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u5b9f\u8df5\u7684\u306b\u4f7f\u7528\u3055\u308c\u3001\u305d\u306e\u4fe1\u983c\u6027\u3068\u52b9\u7387\u6027\u304c\u5b9f\u8a3c\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>Guava\u304c\u9078\u3070\u308c\u308b\u4e3b\u306a\u7406\u7531\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Google\u54c1\u8cea\u306e\u4fe1\u983c\u6027<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Google\u306e\u5b9f\u904b\u7528\u74b0\u5883\u306710\u5e74\u4ee5\u4e0a\u306e\u5b9f\u7e3e<\/li>\n\n\n\n<li>\u53b3\u683c\u306a\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3068\u30c6\u30b9\u30c8\u30d7\u30ed\u30bb\u30b9<\/li>\n\n\n\n<li>\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u30b5\u30dd\u30fc\u30c8<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8c4a\u5bcc\u306a\u6a5f\u80fd\u30bb\u30c3\u30c8<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3<\/li>\n\n\n\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u80fd<\/li>\n\n\n\n<li>\u6587\u5b57\u5217\u51e6\u7406<\/li>\n\n\n\n<li>I\/O\u64cd\u4f5c\u306e\u7c21\u7d20\u5316<\/li>\n\n\n\n<li>\u4e26\u884c\u51e6\u7406\u306e\u30b5\u30dd\u30fc\u30c8<\/li>\n<\/ul>\n\n\n\n<p>\u5b9f\u969b\u306e\u5c0e\u5165\u4f8b\uff1a<\/p>\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=\"\">\/\/ \u5f93\u6765\u306eJava\u3067\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\nList&lt;String&gt; list = new ArrayList&lt;&gt;();\nlist.add(\"item1\");\nlist.add(\"item2\");\nMap&lt;String, Integer&gt; map = new HashMap&lt;&gt;();\nmap.put(\"key1\", 1);\nmap.put(\"key2\", 2);\n\n\/\/ Guava\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\nList&lt;String&gt; list = Lists.newArrayList(\"item1\", \"item2\");\nMap&lt;String, Integer&gt; map = ImmutableMap.of(\"key1\", 1, \"key2\", 2);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u5f93\u6765\u306eJava\u306e\u8ab2\u984c\u3092\u89e3\u6c7a\u3059\u308b\u9769\u65b0\u7684\u306a\u6a5f\u80fd\u7fa4<\/h3>\n\n\n\n<p>Guava\u306f\u3001Java\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u9650\u754c\u3092\u88dc\u5b8c\u3057\u3001\u591a\u304f\u306e\u4e00\u822c\u7684\u306a\u958b\u767a\u8ab2\u984c\u306b\u5bfe\u3059\u308b\u6d17\u7df4\u3055\u308c\u305f\u89e3\u6c7a\u7b56\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>NullPointerException\u306e\u9632\u6b62<\/li>\n<\/ol>\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=\"\">\/\/ \u5f93\u6765\u306eNull\u78ba\u8a8d\nif (value != null) {\n    doSomething(value);\n}\n\n\/\/ Guava\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\nOptional&lt;String&gt; value = Optional.of(\"test\");\nvalue.ifPresent(this::doSomething);<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5b9f\u88c5<\/li>\n<\/ol>\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=\"\">\/\/ Guava\u306b\u3088\u308b\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u4f5c\u6210\nImmutableList&lt;String&gt; immutableList = ImmutableList.of(\"item1\", \"item2\");\nImmutableSet&lt;String&gt; immutableSet = ImmutableSet.of(\"item1\", \"item2\");<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\u52b9\u7387\u7684\u306a\u6587\u5b57\u5217\u51e6\u7406<\/li>\n<\/ol>\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=\"\">\/\/ Guava\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u3092\u4f7f\u7528\u3057\u305f\u6587\u5b57\u5217\u51e6\u7406\nString joined = Joiner.on(\",\")\n    .skipNulls()\n    .join(Arrays.asList(\"foo\", null, \"bar\")); \/\/ \u7d50\u679c: \"foo,bar\"<\/pre>\n\n\n\n<p>Guava\u304c\u89e3\u6c7a\u3059\u308b\u4e3b\u8981\u306a\u8ab2\u984c\uff1a<\/p>\n\n\n<div id=\"id-099ce9ae-18b5-4d8d-bb4c-636e98115b39\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8ab2\u984c<\/th><th>Guava\u306b\u3088\u308b\u89e3\u6c7a\u7b56<\/th><th>\u30e1\u30ea\u30c3\u30c8<\/th><\/tr><\/thead><tbody><tr><td>\u5197\u9577\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c<\/td><td>\u76f4\u611f\u7684\u306a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u30e1\u30bd\u30c3\u30c9<\/td><td>\u30b3\u30fc\u30c9\u91cf\u306e\u524a\u6e1b\u3001\u53ef\u8aad\u6027\u306e\u5411\u4e0a<\/td><\/tr><tr><td>Null\u306e\u5b89\u5168\u6027<\/td><td>Optional\u578b\u3068Preconditions<\/td><td>\u30d0\u30b0\u306e\u9632\u6b62\u3001\u5805\u7262\u6027\u306e\u5411\u4e0a<\/td><\/tr><tr><td>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u6027\u306e\u5b9f\u73fe<\/td><td>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/td><td>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u6027\u306e\u78ba\u4fdd<\/td><\/tr><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5b9f\u88c5<\/td><td>CacheBuilder<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001Guava\u306f\u73fe\u4ee3\u306eJava\u958b\u767a\u306b\u304a\u3051\u308b\u591a\u304f\u306e\u5171\u901a\u8ab2\u984c\u306b\u5bfe\u3057\u3066\u3001\u5b9f\u8df5\u7684\u3067\u52b9\u7387\u7684\u306a\u89e3\u6c7a\u7b56\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u3088\u308a\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u3001\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u306e\u6d3b\u7528\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">Guava\u3092\u5c0e\u5165\u3059\u308b\u30e1\u30ea\u30c3\u30c8\u3068\u6d3b\u7528\u30b7\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u958b\u767a\u52b9\u7387\u304c3\u500d\u5411\u4e0a\u3059\u308b\u4fbf\u5229\u6a5f\u80fd\u306e\u6570\u3005<\/h3>\n\n\n\n<p>Guava\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u591a\u304f\u306e\u4f01\u696d\u304c\u958b\u767a\u52b9\u7387\u306e\u5927\u5e45\u306a\u5411\u4e0a\u3092\u5831\u544a\u3057\u3066\u3044\u307e\u3059\u3002\u5177\u4f53\u7684\u306a\u52b9\u7387\u5316\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u306e\u52b9\u7387\u5316<\/li>\n<\/ol>\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=\"\">\/\/ \u5f93\u6765\u306e\u5b9f\u88c5\uff08\u8907\u6570\u884c\u5fc5\u8981\uff09\nList&lt;User&gt; activeUsers = new ArrayList&lt;&gt;();\nfor (User user : allUsers) {\n    if (user.isActive() &amp;&amp; user.getAge() &gt; 20) {\n        activeUsers.add(user);\n    }\n}\n\n\/\/ Guava\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\uff081\u884c\u3067\u5b8c\u7d50\uff09\nList&lt;User&gt; activeUsers = Lists.newArrayList(Collections2.filter(allUsers, \n    user -&gt; user.isActive() &amp;&amp; user.getAge() &gt; 20));<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306e\u7c21\u7d20\u5316<\/li>\n<\/ol>\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=\"\">\/\/ \u5f93\u6765\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\nBufferedReader reader = null;\ntry {\n    reader = new BufferedReader(new FileReader(\"test.txt\"));\n    String content = \"\";\n    String line;\n    while ((line = reader.readLine()) != null) {\n        content += line + \"\\n\";\n    }\n} finally {\n    if (reader != null) {\n        reader.close();\n    }\n}\n\n\/\/ Guava\u3092\u4f7f\u7528\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\nString content = Files.asCharSource(new File(\"test.txt\"), Charsets.UTF_8)\n    .read();<\/pre>\n\n\n\n<p>\u958b\u767a\u52b9\u7387\u5411\u4e0a\u306e\u5177\u4f53\u7684\u306a\u6570\u5024\uff1a<\/p>\n\n\n<div id=\"id-9ff3ec30-fd26-4b69-ac06-fd0f5ba5d441\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u4f5c\u696d\u5185\u5bb9<\/th><th>\u5f93\u6765\u306e\u6240\u8981\u6642\u9593<\/th><th>Guava\u5c0e\u5165\u5f8c<\/th><th>\u524a\u6e1b\u7387<\/th><\/tr><\/thead><tbody><tr><td>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u51e6\u7406<\/td><td>30\u5206<\/td><td>10\u5206<\/td><td>67%<\/td><\/tr><tr><td>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c<\/td><td>45\u5206<\/td><td>15\u5206<\/td><td>67%<\/td><\/tr><tr><td>NULL\u51e6\u7406<\/td><td>20\u5206<\/td><td>5\u5206<\/td><td>75%<\/td><\/tr><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5<\/td><td>120\u5206<\/td><td>30\u5206<\/td><td>75%<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30d0\u30b0\u309280%\u524a\u6e1b\u3067\u304d\u308b\u5805\u5b9f\u306a\u5b9f\u88c5\u65b9\u6cd5<\/h3>\n\n\n\n<p>Guava\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u4e00\u822c\u7684\u306a\u30d0\u30b0\u306e\u591a\u304f\u3092\u672a\u7136\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e3b\u8981\u306a\u30d0\u30b0\u9632\u6b62\u6a5f\u80fd\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>NullPointerException \u306e\u9632\u6b62<\/li>\n<\/ol>\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=\"\">\/\/ Preconditions\u306b\u3088\u308b\u5f15\u6570\u691c\u8a3c\npublic User getUser(String id, Integer age) {\n    checkNotNull(id, \"User ID cannot be null\");\n    checkNotNull(age, \"Age cannot be null\");\n    checkArgument(age &gt;= 0, \"Age must be non-negative\");\n    \/\/ \u51e6\u7406\u306e\u7d9a\u304d\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u3088\u308b\u4e26\u884c\u51e6\u7406\u30d0\u30b0\u306e\u9632\u6b62<\/li>\n<\/ol>\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=\"\">\/\/ \u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30ea\u30b9\u30c8\u306e\u4f5c\u6210\nImmutableList&lt;String&gt; safeList = ImmutableList.of(\"item1\", \"item2\");\n\n\/\/ \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30de\u30c3\u30d7\u306e\u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\nImmutableMap&lt;String, Integer&gt; safeMap = ImmutableMap.&lt;String, Integer&gt;builder()\n    .put(\"key1\", 1)\n    .put(\"key2\", 2)\n    .build();<\/pre>\n\n\n\n<p>\u30d0\u30b0\u524a\u6e1b\u52b9\u679c\u306e\u7d71\u8a08\uff1a<\/p>\n\n\n<div id=\"id-545e0a63-eaca-43cb-9c44-6949fb8387e0\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d0\u30b0\u306e\u7a2e\u985e<\/th><th>\u524a\u6e1b\u7387<\/th><th>\u4e3b\u306a\u9632\u6b62\u30e1\u30ab\u30cb\u30ba\u30e0<\/th><\/tr><\/thead><tbody><tr><td>NullPointerException<\/td><td>90%<\/td><td>Optional, Preconditions<\/td><\/tr><tr><td>\u4e26\u884c\u51e6\u7406\u306e\u4e0d\u5177\u5408<\/td><td>85%<\/td><td>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/td><\/tr><tr><td>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af<\/td><td>70%<\/td><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u80fd<\/td><\/tr><tr><td>\u30c7\u30fc\u30bf\u6574\u5408\u6027\u30a8\u30e9\u30fc<\/td><td>75%<\/td><td>\u5165\u529b\u5024\u691c\u8a3c<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5c0e\u5165\u52b9\u679c\u3092\u6700\u5927\u5316\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u65e9\u671f\u304b\u3089\u306e\u5c0e\u5165<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b0\u898f\u30b3\u30fc\u30c9\u3067\u306e\u7a4d\u6975\u7684\u306a\u6d3b\u7528<\/li>\n\n\n\n<li>\u65e2\u5b58\u30b3\u30fc\u30c9\u306e\u6bb5\u968e\u7684\u306a\u79fb\u884c<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c1\u30fc\u30e0\u5168\u4f53\u3067\u306e\u6a19\u6e96\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u3078\u306e\u7d44\u307f\u8fbc\u307f<\/li>\n\n\n\n<li>\u30ec\u30d3\u30e5\u30fc\u6642\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u9069\u5207\u306a\u6a5f\u80fd\u306e\u9078\u629e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u305f\u6a5f\u80fd\u9078\u5b9a<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u5c0e\u5165\u5224\u65ad<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001Guava\u306e\u9069\u5207\u306a\u5c0e\u5165\u306b\u3088\u308a\u3001\u958b\u767a\u52b9\u7387\u306e\u5411\u4e0a\u3068\u30d0\u30b0\u306e\u524a\u6e1b\u3092\u540c\u6642\u306b\u5b9f\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u3088\u308a\u8a73\u7d30\u306b\u89e3\u8aac\u3057\u3001\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">Guava\u306e\u4e3b\u8981\u6a5f\u80fd\u3068\u5b9f\u8df5\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u64cd\u4f5c\u3092\u7c21\u5358\u306b\u66f8\u304fCollections\u6a5f\u80fd<\/h3>\n\n\n\n<p>Guava\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u6a5f\u80fd\u306f\u3001Java\u6a19\u6e96\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3API\u3092\u5f37\u529b\u306b\u62e1\u5f35\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u751f\u6210\u3068\u5909\u63db<\/li>\n<\/ol>\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=\"\">\/\/ \u30ea\u30b9\u30c8\u306e\u4f5c\u6210\u3068\u521d\u671f\u5316\nList&lt;String&gt; list = Lists.newArrayList(\"a\", \"b\", \"c\");\n\n\/\/ \u30bb\u30c3\u30c8\u3078\u306e\u5909\u63db\nSet&lt;String&gt; set = Sets.newHashSet(list);\n\n\/\/ \u30de\u30eb\u30c1\u30de\u30c3\u30d7\u306e\u4f7f\u7528\uff081\u3064\u306e\u30ad\u30fc\u306b\u8907\u6570\u306e\u5024\uff09\nMultimap&lt;String, String&gt; multimap = ArrayListMultimap.create();\nmultimap.put(\"fruits\", \"apple\");\nmultimap.put(\"fruits\", \"banana\");\n\/\/ fruits -&gt; [apple, banana]<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u9ad8\u5ea6\u306a\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3068\u5909\u63db<\/li>\n<\/ol>\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=\"\">List&lt;Integer&gt; numbers = Lists.newArrayList(1, 2, 3, 4, 5);\n\n\/\/ \u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\nCollection&lt;Integer&gt; evenNumbers = Collections2.filter(numbers, \n    n -&gt; n % 2 == 0);\n\n\/\/ \u5909\u63db\uff08\u30de\u30c3\u30d4\u30f3\u30b0\uff09\nCollection&lt;String&gt; numberStrs = Collections2.transform(numbers,\n    n -&gt; \"Number: \" + n);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">NullPointerException\u5bfe\u7b56\u306b\u6709\u52b9\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u6a5f\u80fd<\/h3>\n\n\n\n<p>Null\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u305f\u3081\u306eGuava\u306e\u6a5f\u80fd\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Optional\u578b\u306e\u4f7f\u7528<\/li>\n<\/ol>\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=\"\">\/\/ Optional\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u6cd5\nOptional&lt;User&gt; user = Optional.of(new User(\"John\"));\nuser.ifPresent(u -&gt; System.out.println(u.getName()));\n\n\/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306e\u8a2d\u5b9a\nString name = Optional.ofNullable(user.get().getName())\n    .or(() -&gt; \"Anonymous\");\n\n\/\/ \u6761\u4ef6\u4ed8\u304d\u51e6\u7406\nOptional&lt;Integer&gt; age = Optional.ofNullable(user.get().getAge())\n    .filter(a -&gt; a &gt;= 18);<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>Preconditions\u306b\u3088\u308b\u4e8b\u524d\u6761\u4ef6\u30c1\u30a7\u30c3\u30af<\/li>\n<\/ol>\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 void processUser(User user, String action) {\n    \/\/ \u5f15\u6570\u306e\u691c\u8a3c\n    checkNotNull(user, \"User must not be null\");\n    checkNotNull(action, \"Action must not be null\");\n    checkArgument(!action.isEmpty(), \"Action must not be empty\");\n\n    \/\/ \u72b6\u614b\u306e\u691c\u8a3c\n    checkState(user.isActive(), \"User must be active\");\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30ad\u30e3\u30c3\u30b7\u30e5\u5b9f\u88c5\u3092\u7c21\u5358\u306b\u3059\u308b\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u80fd<\/h3>\n\n\n\n<p>Guava\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u6a5f\u80fd\u306f\u3001\u30e1\u30e2\u30ea\u52b9\u7387\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u4e21\u7acb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u69cb\u7bc9<\/li>\n<\/ol>\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=\"\">\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30d3\u30eb\u30c0\u30fc\u306e\u4f7f\u7528\nLoadingCache&lt;Key, Graph&gt; graphs = CacheBuilder.newBuilder()\n    .maximumSize(1000)                  \/\/ \u6700\u5927\u30a8\u30f3\u30c8\u30ea\u6570\n    .expireAfterWrite(10, TimeUnit.MINUTES)  \/\/ \u6709\u52b9\u671f\u9650\n    .removalListener(notification -&gt; {        \/\/ \u524a\u9664\u901a\u77e5\n        System.out.println(\"Removed: \" + notification.getKey());\n    })\n    .build(new CacheLoader&lt;Key, Graph&gt;() {    \/\/ \u5024\u306e\u81ea\u52d5\u30ed\u30fc\u30c9\n        @Override\n        public Graph load(Key key) {\n            return createExpensiveGraph(key);\n        }\n    });<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u9ad8\u5ea6\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u8a2d\u5b9a<\/li>\n<\/ol>\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=\"\">Cache&lt;String, User&gt; userCache = CacheBuilder.newBuilder()\n    .maximumSize(10000)\n    .expireAfterWrite(10, TimeUnit.MINUTES)\n    .expireAfterAccess(5, TimeUnit.MINUTES)\n    .weakKeys()           \/\/ \u30ad\u30fc\u306e\u5f31\u53c2\u7167\n    .softValues()         \/\/ \u5024\u306e\u30bd\u30d5\u30c8\u53c2\u7167\n    .recordStats()        \/\/ \u7d71\u8a08\u60c5\u5831\u306e\u8a18\u9332\n    .build();\n\n\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u4f7f\u7528\nuserCache.put(\"user1\", new User(\"John\"));\nUser user = userCache.getIfPresent(\"user1\");  \/\/ null\u306e\u53ef\u80fd\u6027\u3042\u308a<\/pre>\n\n\n\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u8a2d\u5b9a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n<div id=\"id-58f05a85-fe8f-4edb-ba0f-209ebde6f9b5\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8a2d\u5b9a\u9805\u76ee<\/th><th>\u63a8\u5968\u5024<\/th><th>\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>maximumSize<\/td><td>1000-10000<\/td><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u5236\u5fa1<\/td><\/tr><tr><td>expireAfterWrite<\/td><td>10-30\u5206<\/td><td>\u30c7\u30fc\u30bf\u306e\u9bae\u5ea6\u78ba\u4fdd<\/td><\/tr><tr><td>expireAfterAccess<\/td><td>5-15\u5206<\/td><td>\u672a\u4f7f\u7528\u30c7\u30fc\u30bf\u306e\u524a\u9664<\/td><\/tr><tr><td>concurrencyLevel<\/td><td>CPU\u6570\u00d72<\/td><td>\u540c\u6642\u30a2\u30af\u30bb\u30b9\u6700\u9069\u5316<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u9ad8\u54c1\u8cea\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30fc\u30c9\u54c1\u8cea\u5411\u4e0a\u306e\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-10\">Guava\u306b\u3088\u308b\u30b3\u30fc\u30c9\u54c1\u8cea\u5411\u4e0a\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9\u3067\u5b9f\u73fe\u3059\u308b\u5b89\u5168\u306a\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\uff08\u4e0d\u5909\uff09\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u4e26\u884c\u51e6\u7406\u306e\u5b89\u5168\u6027\u3092\u9ad8\u3081\u3001\u4e88\u671f\u3057\u306a\u3044\u72b6\u614b\u5909\u66f4\u3092\u9632\u304e\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u30af\u30e9\u30b9\u306e\u57fa\u672c\u5b9f\u88c5<\/li>\n<\/ol>\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=\"\">\/\/ \u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u306a\u30e6\u30fc\u30b6\u30fc\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\npublic final class ImmutableUser {\n    private final String name;\n    private final int age;\n    private final ImmutableList&lt;String&gt; roles;\n\n    private ImmutableUser(String name, int age, List&lt;String&gt; roles) {\n        this.name = checkNotNull(name, \"Name cannot be null\");\n        this.age = age;\n        this.roles = ImmutableList.copyOf(roles);\n    }\n\n    \/\/ \u30d3\u30eb\u30c0\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\n    public static class Builder {\n        private String name;\n        private int age;\n        private final ImmutableList.Builder&lt;String&gt; roles = ImmutableList.builder();\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 addRole(String role) {\n            this.roles.add(role);\n            return this;\n        }\n\n        public ImmutableUser build() {\n            return new ImmutableUser(name, age, roles.build());\n        }\n    }\n\n    \/\/ getter \u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\n    public String getName() { return name; }\n    public int getAge() { return age; }\n    public ImmutableList&lt;String&gt; getRoles() { return roles; }\n}<\/pre>\n\n\n\n<p>\u30a4\u30df\u30e5\u30fc\u30bf\u30d6\u30eb\u5b9f\u88c5\u306e\u30e1\u30ea\u30c3\u30c8\uff1a<\/p>\n\n\n<div id=\"id-0d72d00d-2541-4b23-916f-95fa5575e6b6\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e1\u30ea\u30c3\u30c8<\/th><th>\u8aac\u660e<\/th><th>\u5f71\u97ff\u5ea6<\/th><\/tr><\/thead><tbody><tr><td>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5<\/td><td>\u72b6\u614b\u5909\u66f4\u304c\u306a\u3044\u305f\u3081\u4e26\u884c\u51e6\u7406\u304c\u5b89\u5168<\/td><td>\u9ad8<\/td><\/tr><tr><td>\u30d0\u30b0\u524a\u6e1b<\/td><td>\u4e88\u671f\u3057\u306a\u3044\u72b6\u614b\u5909\u66f4\u3092\u9632\u6b62<\/td><td>\u9ad8<\/td><\/tr><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u53ef\u80fd<\/td><td>\u72b6\u614b\u304c\u5909\u308f\u3089\u306a\u3044\u305f\u3081\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u304c\u5411\u4e0a<\/td><td>\u4e2d<\/td><\/tr><tr><td>\u30c7\u30d0\u30c3\u30b0\u5bb9\u6613<\/td><td>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u72b6\u614b\u8ffd\u8de1\u304c\u7c21\u5358<\/td><td>\u4e2d<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u524d\u63d0\u6761\u4ef6\u306b\u3088\u308b\u5805\u5b9f\u306a\u4e8b\u524d\u6761\u4ef6\u30c1\u30a7\u30c3\u30af<\/h3>\n\n\n\n<p>Guava\u306e<code>Preconditions<\/code>\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u5165\u529b\u5024\u3092\u78ba\u5b9f\u306b\u691c\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u4e8b\u524d\u6761\u4ef6\u30c1\u30a7\u30c3\u30af<\/li>\n<\/ol>\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 class UserService {\n    public User createUser(String name, int age, List&lt;String&gt; roles) {\n        \/\/ \u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u30c1\u30a7\u30c3\u30af\n        checkNotNull(name, \"Name must not be null\");\n        checkNotNull(roles, \"Roles must not be null\");\n\n        \/\/ \u5024\u306e\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\n        checkArgument(age &gt;= 0, \"Age must be non-negative, got %s\", age);\n        checkArgument(age &lt;= 150, \"Age must be &lt;= 150, got %s\", age);\n\n        \/\/ \u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5185\u5bb9\u30c1\u30a7\u30c3\u30af\n        checkArgument(!roles.isEmpty(), \"Roles list must not be empty\");\n\n        \/\/ \u696d\u52d9\u30ed\u30b8\u30c3\u30af\u306e\u524d\u63d0\u6761\u4ef6\n        checkState(isInitialized(), \"Service must be initialized before creating users\");\n\n        return new User(name, age, roles);\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30ab\u30b9\u30bf\u30e0\u691c\u8a3c\u306e\u5b9f\u88c5<\/li>\n<\/ol>\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 class ValidationUtils {\n    public static void validateEmail(String email) {\n        checkNotNull(email, \"Email must not be null\");\n        checkArgument(email.contains(\"@\"), \n            \"Invalid email format: %s\", email);\n    }\n\n    public static void validatePassword(String password) {\n        checkNotNull(password, \"Password must not be null\");\n        checkArgument(password.length() &gt;= 8,\n            \"Password must be at least 8 characters long\");\n        checkArgument(password.matches(\".*[A-Z].*\"),\n            \"Password must contain at least one uppercase letter\");\n    }\n}<\/pre>\n\n\n\n<p>\u4e8b\u524d\u6761\u4ef6\u30c1\u30a7\u30c3\u30af\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u8a2d\u8a08<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u554f\u984c\u306e\u5177\u4f53\u7684\u306a\u5185\u5bb9\u3092\u542b\u3081\u308b<\/li>\n\n\n\n<li>\u671f\u5f85\u3055\u308c\u308b\u5024\u306e\u7bc4\u56f2\u3092\u660e\u793a<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u767a\u751f\u7b87\u6240\u306e\u7279\u5b9a\u3092\u5bb9\u6613\u306b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c1\u30a7\u30c3\u30af\u306e\u512a\u5148\u9806\u4f4d\u4ed8\u3051<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>null \u30c1\u30a7\u30c3\u30af\u3092\u6700\u521d\u306b\u5b9f\u884c<\/li>\n\n\n\n<li>\u57fa\u672c\u7684\u306a\u5024\u306e\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u306e\u691c\u8a3c<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u914d\u616e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8efd\u91cf\u306a\u30c1\u30a7\u30c3\u30af\u3092\u512a\u5148<\/li>\n\n\n\n<li>\u91cd\u3044\u691c\u8a3c\u306f\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u5b9f\u884c<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9045\u5ef6\u8a55\u4fa1<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30d0\u30b0\u306e\u65e9\u671f\u767a\u898b\u3068\u54c1\u8cea\u306e\u5411\u4e0a\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6a5f\u80fd\u3092\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">\u5b9f\u8df5Guava\u306e\u6d3b\u7528\u4f8b\u3068\u5b9f\u88c5\u306e\u30dd\u30a4\u30f3\u30c8<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001Guava\u306f\u7279\u306b\u4ee5\u4e0b\u306e\u9818\u57df\u3067\u5a01\u529b\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ea\u30af\u30a8\u30b9\u30c8\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5b9f\u88c5<\/li>\n<\/ol>\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=\"\">@Service\npublic class UserService {\n    private final LoadingCache&lt;String, User&gt; userCache;\n\n    public UserService() {\n        userCache = CacheBuilder.newBuilder()\n            .maximumSize(10000)\n            .expireAfterWrite(30, TimeUnit.MINUTES)\n            .recordStats()  \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u7d71\u8a08\u306e\u6709\u52b9\u5316\n            .build(new CacheLoader&lt;String, User&gt;() {\n                @Override\n                public User load(String userId) {\n                    return userRepository.findById(userId)\n                        .orElseThrow(() -&gt; new UserNotFoundException(userId));\n                }\n            });\n    }\n\n    public User getUser(String userId) {\n        try {\n            return userCache.get(userId);\n        } catch (ExecutionException e) {\n            throw new ServiceException(\"Failed to get user: \" + userId, e);\n        }\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30ec\u30fc\u30c8\u5236\u9650\u306e\u5b9f\u88c5<\/li>\n<\/ol>\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=\"\">@Component\npublic class RateLimiter {\n    private final LoadingCache&lt;String, AtomicInteger&gt; requestCounts;\n\n    public RateLimiter() {\n        requestCounts = CacheBuilder.newBuilder()\n            .expireAfterWrite(1, TimeUnit.MINUTES)\n            .build(new CacheLoader&lt;String, AtomicInteger&gt;() {\n                @Override\n                public AtomicInteger load(String key) {\n                    return new AtomicInteger(0);\n                }\n            });\n    }\n\n    public boolean allowRequest(String clientId, int maxRequests) {\n        try {\n            AtomicInteger count = requestCounts.get(clientId);\n            return count.incrementAndGet() &lt;= maxRequests;\n        } catch (ExecutionException e) {\n            return false;\n        }\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u306e\u6d3b\u7528\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3067\u306f\u3001Guava\u306e\u6a5f\u80fd\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\u30fc\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5<\/li>\n<\/ol>\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 class GuavaCircuitBreaker {\n    private final LoadingCache&lt;String, ServiceStatus&gt; serviceStatus;\n\n    public GuavaCircuitBreaker() {\n        serviceStatus = CacheBuilder.newBuilder()\n            .expireAfterWrite(1, TimeUnit.MINUTES)\n            .build(new CacheLoader&lt;String, ServiceStatus&gt;() {\n                @Override\n                public ServiceStatus load(String service) {\n                    return new ServiceStatus(true, 0);\n                }\n            });\n    }\n\n    public boolean isServiceAvailable(String serviceName) {\n        try {\n            ServiceStatus status = serviceStatus.get(serviceName);\n            return status.isAvailable() &amp;&amp; \n                   status.getFailureCount() &lt; 5;\n        } catch (ExecutionException e) {\n            return false;\n        }\n    }\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u306e\u6700\u9069\u5316<\/li>\n<\/ol>\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=\"\">@Service\npublic class EventProcessor {\n    private final EventBus eventBus;\n    private final RateLimiter rateLimiter;\n\n    public EventProcessor() {\n        this.eventBus = new AsyncEventBus(\n            Executors.newFixedThreadPool(10));\n        this.rateLimiter = RateLimiter.create(100.0); \/\/ 1\u79d2\u3042\u305f\u308a100\u30ea\u30af\u30a8\u30b9\u30c8\n    }\n\n    @Subscribe\n    public void handleEvent(BusinessEvent event) {\n        if (rateLimiter.tryAcquire()) {\n            \/\/ \u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u30ed\u30b8\u30c3\u30af\n            processEvent(event);\n        } else {\n            \/\/ \u5f8c\u7d9a\u306e\u51e6\u7406\u30ad\u30e5\u30fc\u306b\u8ffd\u52a0\n            queueEvent(event);\n        }\n    }\n}<\/pre>\n\n\n\n<p>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u306e\u5b9f\u88c5\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n<div id=\"id-55da2851-08ec-4934-abd1-2851ecade692\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6a5f\u80fd<\/th><th>\u4f7f\u7528\u65b9\u6cd5<\/th><th>\u52b9\u679c<\/th><\/tr><\/thead><tbody><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5<\/td><td>\u5206\u6563\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u306e\u9023\u643a<\/td><td>\u30ec\u30a4\u30c6\u30f3\u30b7\u524a\u6e1b<\/td><\/tr><tr><td>\u30ec\u30fc\u30c8\u5236\u9650<\/td><td>API\u4fdd\u8b77<\/td><td>\u5b89\u5b9a\u6027\u5411\u4e0a<\/td><\/tr><tr><td>\u30a4\u30d9\u30f3\u30c8\u51e6\u7406<\/td><td>\u975e\u540c\u671f\u901a\u4fe1<\/td><td>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u5411\u4e0a<\/td><\/tr><tr><td>\u4e8b\u524d\u6761\u4ef6\u30c1\u30a7\u30c3\u30af<\/td><td>\u5165\u529b\u691c\u8a3c<\/td><td>\u5805\u7262\u6027\u5411\u4e0a<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u88c5\u6642\u306e\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3078\u306e\u914d\u616e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u306e\u9069\u5207\u306a\u8a2d\u5b9a<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u76e3\u8996<\/li>\n\n\n\n<li>\u5206\u6563\u74b0\u5883\u3067\u306e\u6574\u5408\u6027\u78ba\u4fdd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u904b\u7528\u9762\u3067\u306e\u8003\u616e\u4e8b\u9805<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30ed\u30b0\u51fa\u529b\u306e\u6700\u9069\u5316<\/li>\n\n\n\n<li>\u30e1\u30c8\u30ea\u30af\u30b9\u306e\u53ce\u96c6<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u9ad8\u6027\u80fd\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u5b9f\u88c5\u306b\u304a\u3051\u308b\u6ce8\u610f\u70b9\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">Guava\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0<\/h3>\n\n\n\n<p>Guava\u3092\u52b9\u7387\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30e1\u30e2\u30ea\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30e1\u30e2\u30ea\u6700\u9069\u5316<\/li>\n<\/ol>\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=\"\">\/\/ \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u3092\u6700\u9069\u5316\u3057\u305f\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5b9f\u88c5\nLoadingCache&lt;String, User&gt; userCache = CacheBuilder.newBuilder()\n    .maximumSize(1000)                     \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u306e\u5236\u9650\n    .softValues()                          \/\/ \u30bd\u30d5\u30c8\u53c2\u7167\u306e\u4f7f\u7528\n    .expireAfterWrite(30, TimeUnit.MINUTES)\/\/ \u6709\u52b9\u671f\u9650\u306e\u8a2d\u5b9a\n    .recordStats()                         \/\/ \u7d71\u8a08\u60c5\u5831\u306e\u8a18\u9332\n    .removalListener(notification -&gt; {\n        \/\/ \u30e1\u30e2\u30ea\u89e3\u653e\u6642\u306e\u51e6\u7406\n        logger.info(\"Removed cache entry: {}\", notification.getKey());\n    })\n    .build(new CacheLoader&lt;String, User&gt;() {\n        @Override\n        public User load(String key) {\n            return loadUser(key);\n        }\n    });\n\n\/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u7d71\u8a08\u306e\u76e3\u8996\nCacheStats stats = userCache.stats();\nlogger.info(\"Hit rate: {}%, Average load penalty: {}ms\",\n    stats.hitRate() * 100,\n    stats.averageLoadPenalty() \/ 1_000_000);<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n<div id=\"id-e0b87ed3-0a2a-48ca-b84f-587917111617\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u9805\u76ee<\/th><th>\u78ba\u8a8d\u30dd\u30a4\u30f3\u30c8<\/th><th>\u63a8\u5968\u8a2d\u5b9a<\/th><\/tr><\/thead><tbody><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba<\/td><td>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/td><td>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5168\u4f53\u306e20%\u4ee5\u4e0b<\/td><\/tr><tr><td>\u6709\u52b9\u671f\u9650<\/td><td>\u30c7\u30fc\u30bf\u306e\u9bae\u5ea6<\/td><td>\u30d3\u30b8\u30cd\u30b9\u8981\u4ef6\u306b\u5fdc\u3058\u306610-30\u5206<\/td><\/tr><tr><td>\u4e26\u884c\u5ea6<\/td><td>\u540c\u6642\u30a2\u30af\u30bb\u30b9\u6570<\/td><td>CPU\u6570\u00d71.5<\/td><\/tr><tr><td>\u521d\u671f\u5bb9\u91cf<\/td><td>\u8d77\u52d5\u6642\u306e\u8ca0\u8377<\/td><td>\u60f3\u5b9a\u30b5\u30a4\u30ba\u306e75%<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\u306e\u6700\u9069\u5316<\/li>\n<\/ol>\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=\"\">\/\/ \u52b9\u7387\u7684\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\npublic class CollectionOptimizer {\n    public &lt;T&gt; List&lt;T&gt; optimizeList(List&lt;T&gt; input) {\n        \/\/ \u30b5\u30a4\u30ba\u3092\u4e88\u6e2c\u3057\u3066\u521d\u671f\u5316\n        List&lt;T&gt; result = Lists.newArrayListWithCapacity(input.size());\n\n        \/\/ \u30d0\u30c3\u30c1\u51e6\u7406\u306b\u3088\u308b\u6700\u9069\u5316\n        List&lt;List&lt;T&gt;&gt; batches = Lists.partition(input, 1000);\n        for (List&lt;T&gt; batch : batches) {\n            processBatch(batch);\n        }\n\n        return result;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u6642\u306e\u4e92\u63db\u6027\u5bfe\u5fdc\u65b9\u6cd5<\/h3>\n\n\n\n<p>Guava\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u6642\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d0\u30fc\u30b8\u30e7\u30f3\u4e92\u63db\u6027\u306e\u78ba\u8a8d<\/li>\n<\/ol>\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=\"\">&lt;!-- pom.xml\u3067\u306e\u4f9d\u5b58\u95a2\u4fc2\u7ba1\u7406 --&gt;\n&lt;dependency&gt;\n    &lt;groupId&gt;com.google.guava&lt;\/groupId&gt;\n    &lt;artifactId&gt;guava&lt;\/artifactId&gt;\n    &lt;version&gt;${guava.version}&lt;\/version&gt;\n&lt;\/dependency&gt;\n\n&lt;!-- \u4e92\u63db\u6027\u306e\u3042\u308b\u95a2\u9023\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u6307\u5b9a --&gt;\n&lt;properties&gt;\n    &lt;guava.version&gt;31.1-jre&lt;\/guava.version&gt;\n    &lt;java.version&gt;11&lt;\/java.version&gt;\n&lt;\/properties&gt;<\/pre>\n\n\n\n<p>\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u6642\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u975e\u63a8\u5968API\u5bfe\u5fdc<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u975e\u63a8\u5968\u3068\u306a\u3063\u305f\u30e1\u30bd\u30c3\u30c9\u306e\u78ba\u8a8d<\/li>\n\n\n\n<li>\u4ee3\u66ff\u30e1\u30bd\u30c3\u30c9\u3078\u306e\u79fb\u884c\u8a08\u753b<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u30b3\u30fc\u30c9\u306e\u66f4\u65b0<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e92\u63db\u6027\u7834\u58ca\u306e\u78ba\u8a8d<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30b8\u30e3\u30fc\u30d0\u30fc\u30b8\u30e7\u30f3\u30a2\u30c3\u30d7\u306e\u5f71\u97ff\u78ba\u8a8d<\/li>\n\n\n\n<li>\u30c6\u30b9\u30c8\u5b9f\u884c\u306b\u3088\u308b\u52d5\u4f5c\u78ba\u8a8d<\/li>\n\n\n\n<li>\u30ed\u30b0\u76e3\u8996\u306e\u5f37\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306e\u6027\u80fd\u6e2c\u5b9a<\/li>\n\n\n\n<li>\u30dc\u30c8\u30eb\u30cd\u30c3\u30af\u306e\u7279\u5b9a<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u305f\u6700\u9069\u5316<\/li>\n<\/ul>\n\n\n\n<p>\u4e00\u822c\u7684\u306a\u30c8\u30e9\u30d6\u30eb\u3068\u89e3\u6c7a\u7b56\uff1a<\/p>\n\n\n<div id=\"id-799b8178-2d53-499e-94aa-8b3ad59a0760\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u554f\u984c<\/th><th>\u539f\u56e0<\/th><th>\u89e3\u6c7a\u7b56<\/th><\/tr><\/thead><tbody><tr><td>\u30e1\u30e2\u30ea\u30ea\u30fc\u30af<\/td><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u8a2d\u5b9a\u30df\u30b9<\/td><td>\u30b5\u30a4\u30ba\u5236\u9650\u3068\u6709\u52b9\u671f\u9650\u306e\u898b\u76f4\u3057<\/td><\/tr><tr><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b<\/td><td>\u975e\u52b9\u7387\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c<\/td><td>\u30d0\u30c3\u30c1\u51e6\u7406\u306e\u5c0e\u5165<\/td><\/tr><tr><td>NullPointerException<\/td><td>Optional \u306e\u8aa4\u7528<\/td><td>\u9069\u5207\u306aNull\u51e6\u7406\u306e\u5b9f\u88c5<\/td><\/tr><tr><td>\u30d0\u30fc\u30b8\u30e7\u30f3\u885d\u7a81<\/td><td>\u4f9d\u5b58\u95a2\u4fc2\u306e\u4e0d\u6574\u5408<\/td><td>\u4f9d\u5b58\u95a2\u4fc2\u306e\u660e\u793a\u7684\u306a\u7ba1\u7406<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3092\u610f\u8b58\u3057\u3001\u9069\u5207\u306a\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u3067\u3001Guava\u3092\u52b9\u7387\u7684\u306b\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001Guava\u306e\u5c06\u6765\u6027\u3068\u4ee3\u66ff\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-19\">Guava\u306e\u5c06\u6765\u6027\u3068\u4ee3\u66ff\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306e\u6bd4\u8f03<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">Java\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306e\u6a5f\u80fd\u6bd4\u8f03<\/h3>\n\n\n\n<p>Java\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u3082\u9032\u5316\u3092\u7d9a\u3051\u3066\u304a\u308a\u3001Guava\u3068\u306e\u6a5f\u80fd\u306e\u91cd\u8907\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u4e3b\u8981\u306a\u6a5f\u80fd\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6a5f\u80fd\u6bd4\u8f03\u8868\uff1a<\/p>\n\n\n<div id=\"id-d9d2af12-09cf-4f71-acc7-dda314755228\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6a5f\u80fd<\/th><th>Guava<\/th><th>Java\u6a19\u6e96<\/th><th>\u7279\u5fb4\u6bd4\u8f03<\/th><\/tr><\/thead><tbody><tr><td>Optional<\/td><td>Optional<\/td><td>java.util.Optional<\/td><td>Guava\u304c\u5148\u884c\u5b9f\u88c5\u3001\u73fe\u5728\u306f\u6a19\u6e96\u3092\u63a8\u5968<\/td><\/tr><tr><td>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/td><td>ImmutableList\u7b49<\/td><td>List.of()\u7b49<\/td><td>Guava\u304c\u3088\u308a\u8c4a\u5bcc\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b<\/td><\/tr><tr><td>\u6587\u5b57\u5217\u51e6\u7406<\/td><td>Joiner\/Splitter<\/td><td>String.join()<\/td><td>Guava\u304c\u3088\u308a\u67d4\u8edf\u306a\u64cd\u4f5c\u3092\u63d0\u4f9b<\/td><\/tr><tr><td>\u30ad\u30e3\u30c3\u30b7\u30e5<\/td><td>CacheBuilder<\/td><td>\u306a\u3057<\/td><td>Guava\u306e\u72ec\u81ea\u6a5f\u80fd\u3068\u3057\u3066\u91cd\u8981<\/td><\/tr><tr><td>\u30a4\u30d9\u30f3\u30c8\u51e6\u7406<\/td><td>EventBus<\/td><td>\u306a\u3057<\/td><td>Guava\u306e\u72ec\u81ea\u6a5f\u80fd\u3068\u3057\u3066\u6709\u7528<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u5b9f\u88c5\u4f8b\u306e\u6bd4\u8f03\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c<\/li>\n<\/ol>\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=\"\">\/\/ Java\u6a19\u6e96\u306e\u5b9f\u88c5\nList&lt;String&gt; standardList = List.of(\"a\", \"b\", \"c\");\nMap&lt;String, Integer&gt; standardMap = Map.of(\"key1\", 1, \"key2\", 2);\n\n\/\/ Guava\u306e\u5b9f\u88c5\nImmutableList&lt;String&gt; guavaList = ImmutableList.of(\"a\", \"b\", \"c\");\nImmutableMap&lt;String, Integer&gt; guavaMap = ImmutableMap.of(\"key1\", 1, \"key2\", 2);\n\n\/\/ \u9ad8\u5ea6\u306a\u64cd\u4f5c\n\/\/ Java\u6a19\u6e96\nList&lt;String&gt; filtered = standardList.stream()\n    .filter(s -&gt; s.length() &gt; 1)\n    .collect(Collectors.toList());\n\n\/\/ Guava\nList&lt;String&gt; filtered = Lists.newArrayList(Collections2.filter(\n    guavaList, s -&gt; s.length() &gt; 1));<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">Apache Commons\u7b49\u306e\u4ee3\u66ff\u624b\u6bb5\u3068\u306e\u6bd4\u8f03<\/h3>\n\n\n\n<p>\u4e3b\u8981\u306a\u4ee3\u66ff\u30e9\u30a4\u30d6\u30e9\u30ea\u3068Guava\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Apache Commons<\/li>\n<\/ol>\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=\"\">\/\/ Apache Commons\u306e\u5b9f\u88c5\nList&lt;String&gt; commonsList = ListUtils.emptyIfNull(nullableList);\nString commonsJoined = StringUtils.join(list, \",\");\n\n\/\/ Guava\u306e\u5b9f\u88c5\nList&lt;String&gt; guavaList = Optional.ofNullable(nullableList)\n    .orElse(ImmutableList.of());\nString guavaJoined = Joiner.on(\",\").join(list);<\/pre>\n\n\n\n<p>\u4ee3\u66ff\u30e9\u30a4\u30d6\u30e9\u30ea\u6bd4\u8f03\u8868\uff1a<\/p>\n\n\n<div id=\"id-51d7bea1-56ff-4ec8-8489-af3f7475a9da\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30e9\u30a4\u30d6\u30e9\u30ea<\/th><th>\u9577\u6240<\/th><th>\u77ed\u6240<\/th><th>\u9069\u7528\u30b7\u30fc\u30f3<\/th><\/tr><\/thead><tbody><tr><td>Guava<\/td><td>\u5305\u62ec\u7684\u306a\u6a5f\u80fd\u7fa4\u3001\u9ad8\u6027\u80fd<\/td><td>\u4f9d\u5b58\u30b5\u30a4\u30ba\u5927\u304d\u3044<\/td><td>\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/td><\/tr><tr><td>Apache Commons<\/td><td>\u8efd\u91cf\u3001\u30b7\u30f3\u30d7\u30eb<\/td><td>\u6a5f\u80fd\u304c\u9650\u5b9a\u7684<\/td><td>\u5c0f\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/td><\/tr><tr><td>Eclipse Collections<\/td><td>\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u7279\u5316\u3001\u9ad8\u6027\u80fd<\/td><td>\u5b66\u7fd2\u30b3\u30b9\u30c8\u9ad8\u3044<\/td><td>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u91cd\u8996<\/td><\/tr><tr><td>Vavr<\/td><td>\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/td><td>\u30d1\u30e9\u30c0\u30a4\u30e0\u306e\u9055\u3044<\/td><td>FP\u5fd7\u5411\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u9078\u629e\u57fa\u6e96\u3068\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u898f\u6a21\u306b\u3088\u308b\u9078\u629e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c0f\u898f\u6a21\uff1aJava\u6a19\u6e96 + Commons<\/li>\n\n\n\n<li>\u4e2d\u898f\u6a21\uff1aGuava<\/li>\n\n\n\n<li>\u5927\u898f\u6a21\uff1aGuava + \u5c02\u9580\u30e9\u30a4\u30d6\u30e9\u30ea<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u6a5f\u80fd\u8981\u4ef6\u306b\u3088\u308b\u9078\u629e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u57fa\u672c\u7684\u306a\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\uff1aCommons<\/li>\n\n\n\n<li>\u9ad8\u5ea6\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u64cd\u4f5c\uff1aGuava\/Eclipse Collections<\/li>\n\n\n\n<li>\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\uff1aVavr<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\u306b\u3088\u308b\u9078\u629e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e00\u822c\u7684\u306a\u7528\u9014\uff1a\u3069\u308c\u3067\u3082\u53ef<\/li>\n\n\n\n<li>\u9ad8\u8ca0\u8377\u51e6\u7406\uff1aGuava\/Eclipse Collections<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u5236\u7d04\uff1aCommons<\/li>\n<\/ul>\n\n\n\n<p>Guava\u306e\u5c06\u6765\u5c55\u671b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7d99\u7d9a\u7684\u306a\u767a\u5c55<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Java\u6a19\u6e96\u3068\u306e\u5354\u8abf\u9032\u5316<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/li>\n\n\n\n<li>\u65b0\u6a5f\u80fd\u306e\u8ffd\u52a0<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306e\u6d3b\u6027\u5ea6<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6d3b\u767a\u306a\u958b\u767a\u7d99\u7d9a<\/li>\n\n\n\n<li>\u8c4a\u5bcc\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/li>\n\n\n\n<li>\u5145\u5b9f\u3057\u305f\u30b5\u30dd\u30fc\u30c8<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u63a1\u7528\u30e1\u30ea\u30c3\u30c8<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b9f\u7e3e\u3042\u308b\u4fe1\u983c\u6027<\/li>\n\n\n\n<li>\u8c4a\u5bcc\u306a\u4e8b\u4f8b<\/li>\n\n\n\n<li>\u5b89\u5b9a\u3057\u305f\u958b\u767a<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6bd4\u8f03\u3092\u901a\u3058\u3066\u3001Guava\u306fJava\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3044\u3066\u4eca\u5f8c\u3082\u91cd\u8981\u306a\u4f4d\u7f6e\u3092\u5360\u3081\u7d9a\u3051\u308b\u3068\u4e88\u6e2c\u3055\u308c\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u305d\u306e\u5305\u62ec\u7684\u306a\u6a5f\u80fd\u7fa4\u3068\u9ad8\u3044\u4fe1\u983c\u6027\u304c\u8a55\u4fa1\u3055\u308c\u7d9a\u3051\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ 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