{"id":401,"date":"2024-10-23T12:14:24","date_gmt":"2024-10-23T03:14:24","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=401"},"modified":"2025-03-24T08:53:21","modified_gmt":"2025-03-23T23:53:21","slug":"%e3%80%90%e5%ae%8c%e5%85%a8%e8%a7%a3%e8%aa%ac%e3%80%91java-switch%e3%81%ae%e5%9f%ba%e6%9c%ac%e3%81%8b%e3%82%89%e5%bf%9c%e7%94%a8%e3%81%be%e3%81%a7-10%e3%81%ae%e5%ae%9f%e8%b7%b5%e7%9a%84%e3%82%b3","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=401","title":{"rendered":"\u3010\u5b8c\u5168\u89e3\u8aac\u3011Java switch\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067 &#8211; 10\u306e\u5b9f\u8df5\u7684\u30b3\u30fc\u30c9\u4f8b\u3067\u5b66\u3076\u52b9\u7387\u7684\u306a\u6761\u4ef6\u5206\u5c90"},"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 switch\u306e\u57fa\u672c\uff1a\u30b7\u30f3\u30d7\u30eb\u3067\u5f37\u529b\u306a\u6761\u4ef6\u5206\u5c90<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">switch\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306e\u69cb\u6587\u3068\u52d5\u4f5c\u539f\u7406<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u5f93\u6765\u306eif-else\u6587\u3068\u306e\u6bd4\u8f03\uff1aswitch\u3092\u4f7f\u3046\u3079\u304d\u5834\u9762<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">2. switch\u6587\u306e\u9032\u5316\uff1aJava 7\u304b\u3089\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u307e\u3067<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">Java 7\uff1aString\u578b\u306e\u30b5\u30dd\u30fc\u30c8\u3067\u5e83\u304c\u308b\u4f7f\u7528\u7bc4\u56f2<\/a>      <\/li>      <li>        <a href=\"#i-5\">Java 12\uff1aswitch\u5f0f\u306e\u5c0e\u5165\u3067\u30b3\u30fc\u30c9\u304c\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u306b<\/a>      <\/li>      <li>        <a href=\"#i-6\">Java 14\u4ee5\u964d\uff1a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3067\u3055\u3089\u306b\u67d4\u8edf\u306a\u6761\u4ef6\u5206\u5c90<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u5c06\u6765\u306e\u5c55\u671b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">3. \u5b9f\u8df5\u7684\u30b3\u30fc\u30c9\u4f8b\uff1a10\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u5b66\u3076switch\u6587\u306e\u6d3b\u7528\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u4f8b1\uff1a \u57fa\u672c\u7684\u306a\u6570\u5024\u30de\u30c3\u30c1\u30f3\u30b0 \u2013 \u66dc\u65e5\u30b3\u30fc\u30c9\u304b\u3089\u66dc\u65e5\u540d\u3092\u53d6\u5f97<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u4f8b2\uff1a \u6587\u5b57\u5217\u30de\u30c3\u30c1\u30f3\u30b0 \u2013 \u30b3\u30de\u30f3\u30c9\u5165\u529b\u306e\u51e6\u7406<\/a>      <\/li>      <li>        <a href=\"#i-11\">\u4f8b3\uff1a \u5217\u6319\u578b\uff08enum\uff09\u3068switch \u2013 \u4fe1\u53f7\u6a5f\u306e\u72b6\u614b\u7ba1\u7406<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u4f8b4\uff1a \u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u3092\u6d3b\u7528\u3057\u305f\u6708\u306e\u65e5\u6570\u8a08\u7b97<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u4f8b5\uff1a switch\u5f0f\u3092\u4f7f\u3063\u305f\u623b\u308a\u5024\u306e\u8a2d\u5b9a<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u4f8b6\uff1a \u30e9\u30e0\u30c0\u5f0f\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u6761\u4ef6\u5206\u5c90<\/a>      <\/li>      <li>        <a href=\"#i-15\">\u4f8b7\uff1a \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u3088\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306e\u5224\u5225<\/a>      <\/li>      <li>        <a href=\"#i-16\">\u4f8b8\uff1a null\u30b1\u30fc\u30b9\u306e\u6271\u3044\u65b9 \u2013 NullPointerException\u3092\u56de\u907f<\/a>      <\/li>      <li>        <a href=\"#i-17\">\u4f8b9\uff1a \u8907\u5408\u6761\u4ef6\u306e\u30de\u30c3\u30c1\u30f3\u30b0 \u2013 \u7bc4\u56f2\u6307\u5b9a\u3067\u306e\u6210\u7e3e\u8a55\u4fa1<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u4f8b10\uff1a switch\u3068\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u306e\u7d44\u307f\u5408\u308f\u305b \u2013 \u6226\u7565\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-19\">4. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1aswitch\u6587\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">switch\u6587\u306e\u5185\u90e8\u52d5\u4f5c\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027<\/a>      <\/li>      <li>        <a href=\"#i-21\">\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6307\u91dd<\/a>      <\/li>      <li>        <a href=\"#i-22\">common pitfalls\uff1a\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-23\">\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-24\">5. \u5fdc\u7528\u7de8\uff1aswitch\u3092\u8d85\u3048\u305f\u6761\u4ef6\u5206\u5c90\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-25\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068switch\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u5f37\u529b\u306a\u578b\u30c1\u30a7\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-26\">\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a2\u30d7\u30ed\u30fc\u30c1\uff1aMap\u3068\u30e9\u30e0\u30c0\u306b\u3088\u308bswitch\u306e\u4ee3\u66ff<\/a>      <\/li>      <li>        <a href=\"#i-27\">\u5c06\u6765\u306e\u5c55\u671b\uff1aJava\u306e\u9032\u5316\u3068\u5171\u306b\u5909\u308f\u308bswitch\u6587\u306e\u53ef\u80fd\u6027<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-28\">\u307e\u3068\u3081<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-29\">6. \u307e\u3068\u3081\uff1a\u52b9\u679c\u7684\u306aswitch\u6587\u306e\u4f7f\u3044\u65b9\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-30\">switch\u6587\u30de\u30b9\u30bf\u30fc\u3078\u306e5\u3064\u306e\u30ad\u30fc\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li>        <a href=\"#i-31\">\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u8ab2\u984c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-32\">\u7d42\u308f\u308a\u306b<\/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 switch\u306e\u57fa\u672c\uff1a\u30b7\u30f3\u30d7\u30eb\u3067\u5f37\u529b\u306a\u6761\u4ef6\u5206\u5c90<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-2\">\n<p>Java\u8a00\u8a9e\u306b\u304a\u3044\u3066\u3001<code>switch<\/code>\u6587\u306f\u975e\u5e38\u306b\u5f37\u529b\u304b\u3064\u30b7\u30f3\u30d7\u30eb\u306a\u6761\u4ef6\u5206\u5c90\u624b\u6bb5\u3067\u3059\u3002\u3053\u306e\u7bc0\u3067\u306f\u3001<code>switch<\/code>\u6587\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u3001\u69cb\u6587\u3001\u52d5\u4f5c\u539f\u7406\u3001\u305d\u3057\u3066\u5f93\u6765\u306e<code>if-else<\/code>\u6587\u3068\u306e\u6bd4\u8f03\u3092\u901a\u3058\u3066\u3001\u52b9\u679c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-3\">\n<h3 class=\"wp-block-heading\" id=\"i-1\">switch\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306e\u69cb\u6587\u3068\u52d5\u4f5c\u539f\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-4\">\n<p><code>switch<\/code>\u6587\u306f\u3001\u3042\u308b\u5f0f\u306e\u5024\u306b\u57fa\u3065\u3044\u3066\u8907\u6570\u306e\u5b9f\u884c\u30d1\u30b9\u304b\u30891\u3064\u3092\u9078\u629e\u3059\u308b\u5236\u5fa1\u30d5\u30ed\u30fc\u6587\u3067\u3059\u3002\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\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=\"\">switch (expression) {\n    case value1:\n        \/\/ value1\u306b\u4e00\u81f4\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n        break;\n    case value2:\n        \/\/ value2\u306b\u4e00\u81f4\u3057\u305f\u5834\u5408\u306e\u51e6\u7406\n        break;\n    \/\/ ... \u4ed6\u306ecase\n    default:\n        \/\/ \u3069\u306ecase\u306b\u3082\u4e00\u81f4\u3057\u306a\u304b\u3063\u305f\u5834\u5408\u306e\u51e6\u7406\n}<\/pre>\n\n\n<div id=\"sgb-css-id-5\">\n<p><code>switch<\/code>\u6587\u306e\u52d5\u4f5c\u539f\u7406\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-9\">\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\"><code>switch<\/code> \u6587\u306e\u52d5\u4f5c\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-6\">\n<li><strong>\u5f0f\u306e\u578b<\/strong>\uff1a <code>expression<\/code>\u306b\u306f\u6574\u6570\u578b\uff08<code>byte<\/code>, <code>short<\/code>, <code>char<\/code>, <code>int<\/code>\uff09\u3001\u5217\u6319\u578b\uff08<code>enum<\/code>\uff09\u3001\u305d\u3057\u3066Java 7\u4ee5\u964d\u3067\u306f<code>String<\/code>\u578b\u304c\u4f7f\u7528\u53ef\u80fd\u3067\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-7\">\n<li><strong>case\u5b9a\u6570<\/strong>\uff1a \u5404<code>case<\/code>\u30e9\u30d9\u30eb\u306f\u5b9a\u6570\u5f0f\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u5909\u6570\u306f\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-8\">\n<li><strong>\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc<\/strong>\uff1a <code>break<\/code>\u6587\u304c\u306a\u3044\u5834\u5408\u3001\u6b21\u306e<code>case<\/code>\u306b\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\uff08\u843d\u4e0b\uff09\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u610f\u56f3\u7684\u306b\u5229\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>default<\/strong>\uff1a <code>default<\/code>\u30e9\u30d9\u30eb\u306f\u4efb\u610f\u3067\u3059\u304c\u3001\u3069\u306e<code>case<\/code>\u306b\u3082\u4e00\u81f4\u3057\u306a\u3044\u5834\u5408\u306e\u51e6\u7406\u3092\u66f8\u304f\u305f\u3081\u306b\u901a\u5e38\u306f\u4f7f\u7528\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-10\">\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u5f93\u6765\u306eif-else\u6587\u3068\u306e\u6bd4\u8f03\uff1aswitch\u3092\u4f7f\u3046\u3079\u304d\u5834\u9762<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-11\">\n<p><code>switch<\/code>\u6587\u3068<code>if-else<\/code>\u6587\u306f\u4e21\u65b9\u3068\u3082\u6761\u4ef6\u5206\u5c90\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u306b\u9069\u3057\u305f\u5834\u9762\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-14\">\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\">switch\u306e\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:#009EF3;background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-12\">\n<li><strong>\u53ef\u8aad\u6027<\/strong>\uff1a \u7279\u306b\u591a\u5206\u5c90\u306e\u5834\u5408\u3001<code>switch<\/code>\u6587\u306e\u65b9\u304c\u69cb\u9020\u7684\u306b\u6574\u7406\u3055\u308c\u3066\u304a\u308a\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u3067\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-13\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong>\uff1a \u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u6700\u9069\u5316\u3057\u3084\u3059\u3044\u305f\u3081\u3001\u591a\u304f\u306e\u5834\u5408<code>switch<\/code>\u6587\u306e\u65b9\u304c\u9ad8\u901f\u3067\u3059\u3002<\/li>\n<\/div>\n\n\n<li><strong>\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u524a\u6e1b<\/strong>\uff1a <code>case<\/code>\u6587\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u4f3c\u305f\u3088\u3046\u306a\u6761\u4ef6\u30c1\u30a7\u30c3\u30af\u306e\u7e70\u308a\u8fd4\u3057\u3092\u907f\u3051\u3089\u308c\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-17\">\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\">switch\u3092\u4f7f\u3046\u3079\u304d\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-15\">\n<li>\u5358\u4e00\u306e\u5909\u6570\u3084\u5f0f\u306b\u57fa\u3065\u3044\u3066\u591a\u304f\u306e\u5206\u5c90\u304c\u3042\u308b\u5834\u5408<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-16\">\n<li>\u7b49\u4fa1\u6bd4\u8f03\uff08<code>==<\/code>\uff09\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408<\/li>\n<\/div>\n\n\n<li>\u5206\u5c90\u306e\u6761\u4ef6\u304c\u5b9a\u6570\u5024\u3067\u3042\u308b\u5834\u5408<\/li>\n<\/ul>\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=\"\">\/\/ Good use of switch\nint dayOfWeek = 3;\nString dayName;\nswitch (dayOfWeek) {\n    case 1: dayName = \"\u6708\u66dc\u65e5\"; break;\n    case 2: dayName = \"\u706b\u66dc\u65e5\"; break;\n    case 3: dayName = \"\u6c34\u66dc\u65e5\"; break;\n    \/\/ ... \u4ed6\u306e\u66dc\u65e5\n    default: dayName = \"\u4e0d\u660e\u306a\u65e5\"; break;\n}<\/pre>\n\n\n<div id=\"sgb-css-id-20\">\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\">if-else\u3092\u4f7f\u3046\u3079\u304d\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-18\">\n<li>\u8907\u96d1\u306a\u6761\u4ef6\u3084\u7bc4\u56f2\u306e\u6bd4\u8f03\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-19\">\n<li>\u30d6\u30fc\u30eb\u5f0f\u306e\u8a55\u4fa1\u304c\u5fc5\u8981\u306a\u5834\u5408<\/li>\n<\/div>\n\n\n<li>\u5c11\u6570\u306e\u5206\u5c90\u3057\u304b\u306a\u3044\u5834\u5408<\/li>\n<\/ul>\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=\"\">\/\/ Better with if-else\nint score = 85;\nString grade;\nif (score &gt;= 90) {\n    grade = \"A\";\n} else if (score &gt;= 80) {\n    grade = \"B\";\n} else if (score &gt;= 70) {\n    grade = \"C\";\n} else {\n    grade = \"F\";\n}<\/pre>\n\n\n<div id=\"sgb-css-id-21\">\n<p><code>switch<\/code>\u6587\u306f\u3001\u9069\u5207\u306a\u5834\u9762\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3001\u4fdd\u5b88\u6027\u3001\u305d\u3057\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u7ae0\u3067\u306f\u3001Java\u8a00\u8a9e\u306e\u9032\u5316\u306b\u4f34\u3046<code>switch<\/code>\u6587\u306e\u65b0\u6a5f\u80fd\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-22\">\n<h2 class=\"wp-block-heading\" id=\"i-3\">2. switch\u6587\u306e\u9032\u5316\uff1aJava 7\u304b\u3089\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u307e\u3067<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-23\">\n<p>Java\u8a00\u8a9e\u306e\u9032\u5316\u306b\u4f34\u3044\u3001<code>switch<\/code>\u6587\u3082\u5927\u304d\u304f\u9032\u5316\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u7bc0\u3067\u306f\u3001Java 7\u304b\u3089\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u307e\u3067\u306e<code>switch<\/code>\u6587\u306e\u4e3b\u8981\u306a\u5909\u66f4\u70b9\u3092\u89e3\u8aac\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u65b0\u6a5f\u80fd\u304c\u3069\u306e\u3088\u3046\u306b\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u3092\u6539\u5584\u3057\u305f\u304b\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-24\">\n<h3 class=\"wp-block-heading\" id=\"i-4\">Java 7\uff1aString\u578b\u306e\u30b5\u30dd\u30fc\u30c8\u3067\u5e83\u304c\u308b\u4f7f\u7528\u7bc4\u56f2<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-25\">\n<p>Java 7\u3067\u306f\u3001<code>switch<\/code>\u6587\u3067String\u578b\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6587\u5b57\u5217\u30d9\u30fc\u30b9\u306e\u6761\u4ef6\u5206\u5c90\u304c\u975e\u5e38\u306b\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-29\">\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>\u4e3b\u306a\u5229\u70b9\uff1a<\/strong><\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\"><div id=\"sgb-css-id-28\">\n<ul class=\"wp-block-list\"><div id=\"sgb-css-id-26\">\n<li>\u6587\u5b57\u5217\u30d9\u30fc\u30b9\u306e\u6761\u4ef6\u5206\u5c90\u304c\u7c21\u6f54\u306b\u8a18\u8ff0\u53ef\u80fd<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-27\">\n<li>\u5217\u6319\u578b\u3068\u540c\u69d8\u306e\u4f7f\u3044\u3084\u3059\u3055\u3067\u6587\u5b57\u5217\u3092\u6271\u3048\u308b<\/li>\n<\/div>\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/li>\n<\/ul>\n<\/div><\/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=\"\">String fruit = \"apple\";\nswitch (fruit) {\n    case \"apple\":\n        System.out.println(\"It's an apple\");\n        break;\n    case \"banana\":\n        System.out.println(\"It's a banana\");\n        break;\n    default:\n        System.out.println(\"Unknown fruit\");\n}<\/pre>\n\n\n<div id=\"sgb-css-id-30\">\n<p>\u3053\u306e\u5909\u66f4\u306b\u3088\u308a\u3001\u4ee5\u524d\u306f<code>if-else<\/code>\u6587\u306e\u9023\u9396\u3067\u51e6\u7406\u3057\u3066\u3044\u305f\u6587\u5b57\u5217\u30d9\u30fc\u30b9\u306e\u6761\u4ef6\u5206\u5c90\u3092\u3001\u3088\u308a\u69cb\u9020\u5316\u3055\u308c\u305f\u5f62\u3067\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-31\">\n<h3 class=\"wp-block-heading\" id=\"i-5\">Java 12\uff1aswitch\u5f0f\u306e\u5c0e\u5165\u3067\u30b3\u30fc\u30c9\u304c\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u306b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-32\">\n<p>Java 12\u3067\u306f\u3001<code>switch<\/code>\u6587\u304c\u5f0f\u3068\u3057\u3066\u3082\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001<code>switch<\/code>\u306e\u7d50\u679c\u3092\u76f4\u63a5\u5909\u6570\u306b\u4ee3\u5165\u3057\u305f\u308a\u3001\u8fd4\u308a\u5024\u3068\u3057\u3066\u4f7f\u7528\u3057\u305f\u308a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-36\">\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>\u4e3b\u306a\u5229\u70b9\uff1a<\/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-33\">\n<li>\u5024\u3092\u76f4\u63a5\u8fd4\u5374\u53ef\u80fd<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-34\">\n<li>\u30a2\u30ed\u30fc\uff08-&gt;\uff09\u69cb\u6587\u3067<code>break<\/code>\u6587\u304c\u4e0d\u8981\u306b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-35\">\n<li>\u8907\u6570\u306e<code>case<\/code>\u3092\u30ab\u30f3\u30de\u3067\u533a\u5207\u3063\u3066\u4e00\u7dd2\u306b\u6271\u3048\u308b<\/li>\n<\/div>\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u5316<\/li>\n<\/ul>\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=\"\">String day = \"MONDAY\";\nString activity = switch (day) {\n    case \"MONDAY\", \"FRIDAY\", \"SUNDAY\" -&gt; \"\u4f11\u3080\";\n    case \"TUESDAY\" -&gt; \"\u52c9\u5f37\u3059\u308b\";\n    case \"THURSDAY\", \"SATURDAY\" -&gt; \"\u8cb7\u3044\u7269\";\n    case \"WEDNESDAY\" -&gt; \"\u6620\u753b\";\n    default -&gt; \"\u4e0d\u660e\";\n};\nSystem.out.println(activity);<\/pre>\n\n\n<div id=\"sgb-css-id-37\">\n<p>\u3053\u306e\u65b0\u3057\u3044\u69cb\u6587\u306b\u3088\u308a\u3001<code>switch<\/code>\u6587\u304c\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306b\u306a\u308a\u3001\u5197\u9577\u306a\u30b3\u30fc\u30c9\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-38\">\n<h3 class=\"wp-block-heading\" id=\"i-6\">Java 14\u4ee5\u964d\uff1a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3067\u3055\u3089\u306b\u67d4\u8edf\u306a\u6761\u4ef6\u5206\u5c90<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-39\">\n<p>Java 14\u304b\u308917\u306b\u304b\u3051\u3066\u3001<code>switch<\/code>\u6587\u306b\u6bb5\u968e\u7684\u306b\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u578b\u30c1\u30a7\u30c3\u30af\u3068\u578b\u30ad\u30e3\u30b9\u30c8\u3092\u540c\u6642\u306b\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u3088\u308a\u67d4\u8edf\u306a\u6761\u4ef6\u5206\u5c90\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-42\">\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>\u4e3b\u306a\u5229\u70b9\uff1a<\/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-40\">\n<li>\u578b\u30c1\u30a7\u30c3\u30af\u3068\u578b\u30ad\u30e3\u30b9\u30c8\u3092\u540c\u6642\u306b\u884c\u3048\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-41\">\n<li>null\u30c1\u30a7\u30c3\u30af\u304c\u7c21\u5358<\/li>\n<\/div>\n\n\n<li>\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u306a\u6761\u4ef6\u5206\u5c90\u304c\u53ef\u80fd<\/li>\n<\/ul>\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=\"\">Object obj = 42; \/\/ \u4f55\u3089\u304b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\nString formatted = switch (obj) {\n    case Integer i -&gt; String.format(\"int %d\", i);\n    case Long l    -&gt; String.format(\"long %d\", l);\n    case Double d  -&gt; String.format(\"double %f\", d);\n    case String s  -&gt; String.format(\"String %s\", s);\n    case null      -&gt; \"null\";\n    default        -&gt; obj.toString();\n};\nSystem.out.println(formatted);<\/pre>\n\n\n<div id=\"sgb-css-id-43\">\n<p>\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6a5f\u80fd\u306b\u3088\u308a\u3001\u578b\u306b\u5fdc\u3058\u305f\u51e6\u7406\u3092\u975e\u5e38\u306b\u30a8\u30ec\u30ac\u30f3\u30c8\u306b\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u307e\u305f\u3001<code>null<\/code>\u30c1\u30a7\u30c3\u30af\u3082\u7c21\u5358\u306b\u884c\u3048\u308b\u305f\u3081\u3001<code>NullPointerException<\/code>\u306e\u30ea\u30b9\u30af\u3082\u8efd\u6e1b\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-44\">\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u5c06\u6765\u306e\u5c55\u671b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-45\">\n<p>Java\u8a00\u8a9e\u306e\u9032\u5316\u306f\u7d9a\u3044\u3066\u304a\u308a\u3001<code>switch<\/code>\u6587\u3082\u3055\u3089\u306b\u5f37\u529b\u306b\u306a\u3063\u3066\u3044\u304f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u3088\u308a\u8907\u96d1\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3084\u3001\u30c7\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30b7\u30e7\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u30b5\u30dd\u30fc\u30c8\u306a\u3069\u304c\u691c\u8a0e\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-46\">\n<p>\u3053\u308c\u3089\u306e\u9032\u5316\u306b\u3088\u308a\u3001Java\u958b\u767a\u8005\u306f\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u3001\u304b\u3064\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u65b0\u3057\u3044\u6a5f\u80fd\u3092\u9069\u5207\u306b\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3001\u4fdd\u5b88\u6027\u3001\u305d\u3057\u3066\u5805\u7262\u6027\u3092\u9ad8\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-47\">\n<p>\u6b21\u306e\u7ae0\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u542b\u3080<code>switch<\/code>\u6587\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b\u309210\u500b\u7d39\u4ecb\u3057\u3001\u69d8\u3005\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306e\u6d3b\u7528\u65b9\u6cd5\u3092\u63a2\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-48\">\n<h2 class=\"wp-block-heading\" id=\"i-8\">3. \u5b9f\u8df5\u7684\u30b3\u30fc\u30c9\u4f8b\uff1a10\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u5b66\u3076switch\u6587\u306e\u6d3b\u7528\u6cd5<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-49\">\n<p>\u672c\u7bc0\u3067\u306f\u3001Java <code>switch<\/code>\u6587\u306e\u69d8\u3005\u306a\u4f7f\u7528\u65b9\u6cd5\u309210\u500b\u306e\u5b9f\u8df5\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u901a\u3058\u3066\u5b66\u3073\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4f8b\u3092\u901a\u3058\u3066\u3001<code>switch<\/code>\u6587\u306e\u67d4\u8edf\u6027\u3068\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u7406\u89e3\u3057\u3001\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u3092\u7fd2\u5f97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-50\">\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u4f8b1\uff1a \u57fa\u672c\u7684\u306a\u6570\u5024\u30de\u30c3\u30c1\u30f3\u30b0 \u2013 \u66dc\u65e5\u30b3\u30fc\u30c9\u304b\u3089\u66dc\u65e5\u540d\u3092\u53d6\u5f97<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-51\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u6574\u6570\u306e\u66dc\u65e5\u30b3\u30fc\u30c9\uff081-7\uff09\u304b\u3089\u5bfe\u5fdc\u3059\u308b\u66dc\u65e5\u540d\u3092\u53d6\u5f97\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=\"\">int dayCode = 3;\nString dayName = switch (dayCode) {\n    case 1 -&gt; \"\u6708\u66dc\u65e5\";\n    case 2 -&gt; \"\u706b\u66dc\u65e5\";\n    case 3 -&gt; \"\u6c34\u66dc\u65e5\";\n    case 4 -&gt; \"\u6728\u66dc\u65e5\";\n    case 5 -&gt; \"\u91d1\u66dc\u65e5\";\n    case 6 -&gt; \"\u571f\u66dc\u65e5\";\n    case 7 -&gt; \"\u65e5\u66dc\u65e5\";\n    default -&gt; \"\u4e0d\u660e\u306a\u65e5\";\n};\nSystem.out.println(dayName); \/\/ \u51fa\u529b: \u6c34\u66dc\u65e5<\/pre>\n\n\n<div id=\"sgb-css-id-52\">\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306f<code>switch<\/code>\u5f0f\u3092\u4f7f\u7528\u3057\u3066\u3001\u6570\u5024\u304b\u3089\u6587\u5b57\u5217\u3078\u306e\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u7c21\u6f54\u306b\u8868\u73fe\u3057\u3066\u3044\u307e\u3059\u3002<code>-&gt;<\/code>\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5404<code>case<\/code>\u304c\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<code>default<\/code>\u30b1\u30fc\u30b9\u306f\u5165\u529b\u5024\u304c\u7bc4\u56f2\u5916\u306e\u5834\u5408\u306b\u5bfe\u5fdc\u3057\u3001\u5805\u7262\u6027\u3092\u9ad8\u3081\u3066\u3044\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\"><strong>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-53\">\n<li>\u6570\u5024\u306b\u3088\u308b\u660e\u78ba\u306a\u5206\u5c90<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-54\">\n<li>\u77e2\u5370\u69cb\u6587\uff08<code>-&gt;<\/code>)\u306b\u3088\u308b\u7c21\u6f54\u306a\u8a18\u8ff0<\/li>\n<\/div>\n\n\n<li><code>default<\/code>\u30b1\u30fc\u30b9\u306b\u3088\u308b\u4f8b\u5916\u51e6\u7406<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-56\">\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u4f8b2\uff1a \u6587\u5b57\u5217\u30de\u30c3\u30c1\u30f3\u30b0 \u2013 \u30b3\u30de\u30f3\u30c9\u5165\u529b\u306e\u51e6\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-57\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u30b3\u30de\u30f3\u30c9\u5165\u529b\u3092\u51e6\u7406\u3057\u3001\u9069\u5207\u306a\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\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=\"\">String command = \"help\";\nswitch (command.toLowerCase()) {\n    case \"start\" -&gt; System.out.println(\"\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u958b\u59cb\u3057\u307e\u3059\");\n    case \"stop\" -&gt; System.out.println(\"\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u505c\u6b62\u3057\u307e\u3059\");\n    case \"restart\" -&gt; System.out.println(\"\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u518d\u8d77\u52d5\u3057\u307e\u3059\");\n    case \"help\" -&gt; System.out.println(\"\u30d8\u30eb\u30d7\u30e1\u30cb\u30e5\u30fc\u3092\u8868\u793a\u3057\u307e\u3059\");\n    default -&gt; System.out.println(\"\u4e0d\u660e\u306a\u30b3\u30de\u30f3\u30c9\u3067\u3059\");\n}<\/pre>\n\n\n<div id=\"sgb-css-id-58\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u6587\u5b57\u5217\u306e\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<code>toLowerCase()<\/code>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u305b\u305a\u306b\u30b3\u30de\u30f3\u30c9\u3092\u51e6\u7406\u3067\u304d\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\"><strong>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-59\">\n<li>\u6587\u5b57\u5217\u306b\u3088\u308b\u30de\u30c3\u30c1\u30f3\u30b0<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-60\">\n<li>\u5927\u6587\u5b57\u5c0f\u6587\u5b57\u3092\u533a\u5225\u3057\u306a\u3044\u51e6\u7406<\/li>\n<\/div>\n\n\n<li>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u4f8b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-62\">\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u4f8b3\uff1a \u5217\u6319\u578b\uff08enum\uff09\u3068switch \u2013 \u4fe1\u53f7\u6a5f\u306e\u72b6\u614b\u7ba1\u7406<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-63\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u4fe1\u53f7\u6a5f\u306e\u73fe\u5728\u306e\u8272\u306b\u57fa\u3065\u3044\u3066\u3001\u30c9\u30e9\u30a4\u30d0\u30fc\u3078\u306e\u6307\u793a\u3092\u6c7a\u5b9a\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=\"\">enum TrafficLight { RED, YELLOW, GREEN }\n\nTrafficLight currentLight = TrafficLight.YELLOW;\nString action = switch (currentLight) {\n    case RED -&gt; \"\u505c\u6b62\";\n    case YELLOW -&gt; \"\u6e1b\u901f\";\n    case GREEN -&gt; \"\u9032\u884c\";\n};\nSystem.out.println(\"\u4fe1\u53f7: \" + currentLight + \", \u30a2\u30af\u30b7\u30e7\u30f3: \" + action);\n\/\/ \u51fa\u529b: \u4fe1\u53f7: YELLOW, \u30a2\u30af\u30b7\u30e7\u30f3: \u6e1b\u901f<\/pre>\n\n\n<div id=\"sgb-css-id-64\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u5217\u6319\u578b\uff08<code>enum<\/code>\uff09\u3068<code>switch<\/code>\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3044\u307e\u3059\u3002\u5217\u6319\u578b\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30bf\u30a4\u30d7\u30bb\u30fc\u30d5\u306a\u72b6\u614b\u7ba1\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-67\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-65\">\n<li>\u5217\u6319\u578b\u3068\u306e\u76f8\u6027\u306e\u826f\u3055<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-66\">\n<li>\u30bf\u30a4\u30d7\u30bb\u30fc\u30d5\u306a\u72b6\u614b\u7ba1\u7406<\/li>\n<\/div>\n\n\n<li>\u72b6\u614b\u306b\u57fa\u3065\u304f\u30a2\u30af\u30b7\u30e7\u30f3\u6c7a\u5b9a\u306e\u4f8b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-68\">\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u4f8b4\uff1a \u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u3092\u6d3b\u7528\u3057\u305f\u6708\u306e\u65e5\u6570\u8a08\u7b97<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-69\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u4e0e\u3048\u3089\u308c\u305f\u6708\u306e\u65e5\u6570\u3092\u8a08\u7b97\u3057\u307e\u3059\uff08\u3046\u308b\u3046\u5e74\u306f\u8003\u616e\u3057\u307e\u305b\u3093\uff09\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=\"\">int month = 4;\nint days = switch (month) {\n    case 1, 3, 5, 7, 8, 10, 12 -&gt; 31;\n    case 4, 6, 9, 11 -&gt; 30;\n    case 2 -&gt; 28;\n    default -&gt; throw new IllegalArgumentException(\"Invalid month: \" + month);\n};\nSystem.out.println(month + \"\u6708\u306e\u65e5\u6570: \" + days);\n\/\/ \u51fa\u529b: 4\u6708\u306e\u65e5\u6570: 30<\/pre>\n\n\n<div id=\"sgb-css-id-70\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u8907\u6570\u306e<code>case<\/code>\u30921\u884c\u3067\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5f93\u6765\u306e<code>switch<\/code>\u6587\u3067\u306e\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u3092\u4f7f\u7528\u3059\u308b\u4ee3\u66ff\u624b\u6bb5\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-73\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-71\">\n<li>\u8907\u6570\u306e<code>case<\/code>\u306e\u30b0\u30eb\u30fc\u30d7\u5316<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-72\">\n<li>\u4f8b\u5916\u306e\u30b9\u30ed\u30fc<\/li>\n<\/div>\n\n\n<li>\u7c21\u6f54\u3067\u8aad\u307f\u3084\u3059\u3044\u30b3\u30fc\u30c9<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-74\">\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u4f8b5\uff1a switch\u5f0f\u3092\u4f7f\u3063\u305f\u623b\u308a\u5024\u306e\u8a2d\u5b9a<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-75\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1aHTTP\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u306b\u57fa\u3065\u3044\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u751f\u6210\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=\"\">int statusCode = 404;\nString message = switch (statusCode) {\n    case 200, 201, 202 -&gt; \"\u6210\u529f\";\n    case 400, 401, 403 -&gt; \"\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30a8\u30e9\u30fc\";\n    case 500, 502, 503 -&gt; \"\u30b5\u30fc\u30d0\u30fc\u30a8\u30e9\u30fc\";\n    default -&gt; \"\u4e0d\u660e\u306a\u30b9\u30c6\u30fc\u30bf\u30b9\";\n};\nSystem.out.println(\"HTTP \" + statusCode + \": \" + message);\n\/\/ \u51fa\u529b: HTTP 404: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30a8\u30e9\u30fc<\/pre>\n\n\n<div id=\"sgb-css-id-76\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>switch<\/code>\u5f0f\u3092\u4f7f\u7528\u3057\u3066\u76f4\u63a5\u5024\u3092\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u51e6\u7406\u304c\u3088\u308a\u7c21\u6f54\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-79\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-77\">\n<li><code>switch<\/code>\u5f0f\u306e\u7d50\u679c\u3092\u76f4\u63a5\u5909\u6570\u306b\u4ee3\u5165<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-78\">\n<li>\u8907\u6570\u306e\u5024\u30921\u3064\u306e<code>case<\/code>\u3067\u30cf\u30f3\u30c9\u30eb<\/li>\n<\/div>\n\n\n<li>HTTP\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u306e\u5206\u985e\u4f8b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-80\">\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u4f8b6\uff1a \u30e9\u30e0\u30c0\u5f0f\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u9ad8\u5ea6\u306a\u6761\u4ef6\u5206\u5c90<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-81\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u6570\u5b66\u6f14\u7b97\u5b50\u306b\u57fa\u3065\u3044\u3066\u30012\u3064\u306e\u6570\u5024\u306b\u5bfe\u3059\u308b\u6f14\u7b97\u3092\u5b9f\u884c\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=\"\">String operator = \"+\";\nint a = 10, b = 5;\nint result = switch (operator) {\n    case \"+\" -&gt; a + b;\n    case \"-\" -&gt; a - b;\n    case \"*\" -&gt; a * b;\n    case \"\/\" -&gt; {\n        if (b == 0) {\n            throw new ArithmeticException(\"0\u306b\u3088\u308b\u9664\u7b97\");\n        }\n        yield a \/ b;\n    }\n    default -&gt; throw new IllegalArgumentException(\"\u4e0d\u660e\u306a\u6f14\u7b97\u5b50: \" + operator);\n};\nSystem.out.println(a + \" \" + operator + \" \" + b + \" = \" + result);\n\/\/ \u51fa\u529b: 10 + 5 = 15<\/pre>\n\n\n<div id=\"sgb-css-id-82\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u3068<code>yield<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u3088\u308a\u8907\u96d1\u306a\u51e6\u7406\u3092<code>switch<\/code>\u5f0f\u5185\u3067\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-85\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-83\">\n<li>\u30e9\u30e0\u30c0\u5f0f\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-84\">\n<li><code>yield<\/code>\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u4f7f\u7528<\/li>\n<\/div>\n\n\n<li>\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u306e\u8868\u73fe<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-86\">\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u4f8b7\uff1a \u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u3088\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306e\u5224\u5225<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-87\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u69d8\u3005\u306a\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u53d7\u3051\u53d6\u308a\u3001\u305d\u306e\u578b\u306b\u5fdc\u3058\u305f\u51e6\u7406\u3092\u884c\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=\"\">Object obj = 42;\nString result = switch (obj) {\n    case Integer i -&gt; \"\u6574\u6570: \" + i;\n    case String s -&gt; \"\u6587\u5b57\u5217: \" + s;\n    case Double d -&gt; \"\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570: \" + d;\n    case null -&gt; \"null\";\n    default -&gt; \"\u305d\u306e\u4ed6\u306e\u578b: \" + obj.getClass().getSimpleName();\n};\nSystem.out.println(result);\n\/\/ \u51fa\u529b: \u6574\u6570: 42<\/pre>\n\n\n<div id=\"sgb-css-id-88\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001Java 14\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u578b\u30c1\u30a7\u30c3\u30af\u3068\u578b\u30ad\u30e3\u30b9\u30c8\u3092\u540c\u6642\u306b\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-91\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-89\">\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u3088\u308b\u578b\u5224\u5225<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-90\">\n<li><code>null<\/code>\u30c1\u30a7\u30c3\u30af\u306e\u7c21\u7565\u5316<\/li>\n<\/div>\n\n\n<li>\u578b\u306b\u5fdc\u3058\u305f\u51e6\u7406\u306e\u5206\u5c90<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-92\">\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u4f8b8\uff1a null\u30b1\u30fc\u30b9\u306e\u6271\u3044\u65b9 \u2013 NullPointerException\u3092\u56de\u907f<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-93\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u306a\u5024\u3092\u51e6\u7406\u3057\u3001<code>null<\/code>\u306e\u5834\u5408\u306b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8a2d\u5b9a\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=\"\">String input = null;\nString processedInput = switch (input) {\n    case null -&gt; \"\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\";\n    case String s when s.isEmpty() -&gt; \"\u7a7a\u6587\u5b57\u5217\";\n    default -&gt; \"\u5165\u529b\u5024: \" + input;\n};\nSystem.out.println(processedInput);\n\/\/ \u51fa\u529b: \u30c7\u30d5\u30a9\u30eb\u30c8\u5024<\/pre>\n\n\n<div id=\"sgb-css-id-94\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>null<\/code>\u3092\u660e\u793a\u7684\u306b\u51e6\u7406\u3059\u308b\u3053\u3068\u3067<code>NullPointerException<\/code>\u3092\u56de\u907f\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u6761\u4ef6\u4ed8\u304d\u30de\u30c3\u30c1\u30f3\u30b0\uff08<code>when<\/code>\u7bc0\uff09\u3082\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-97\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-95\">\n<li><code>null<\/code>\u306e\u660e\u793a\u7684\u306a\u51e6\u7406<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-96\">\n<li>\u6761\u4ef6\u4ed8\u304d\u30de\u30c3\u30c1\u30f3\u30b0<\/li>\n<\/div>\n\n\n<li>\u5b89\u5168\u306anull\u51e6\u7406<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-98\">\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u4f8b9\uff1a \u8907\u5408\u6761\u4ef6\u306e\u30de\u30c3\u30c1\u30f3\u30b0 \u2013 \u7bc4\u56f2\u6307\u5b9a\u3067\u306e\u6210\u7e3e\u8a55\u4fa1<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-99\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u5b66\u751f\u306e\u70b9\u6570\u306b\u57fa\u3065\u3044\u3066\u6210\u7e3e\u3092\u8a55\u4fa1\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=\"\">int score = 85;\nString grade = switch (score) {\n    case 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100 -&gt; \"A\";\n    case 80, 81, 82, 83, 84, 85, 86, 87, 88, 89 -&gt; \"B\";\n    case 70, 71, 72, 73, 74, 75, 76, 77, 78, 79 -&gt; \"C\";\n    case 60, 61, 62, 63, 64, 65, 66, 67, 68, 69 -&gt; \"D\";\n    default -&gt; \"F\";\n};\nSystem.out.println(\"\u5f97\u70b9: \" + score + \", \u6210\u7e3e: \" + grade);\n\/\/ \u51fa\u529b: \u5f97\u70b9: 85, \u6210\u7e3e: B<\/pre>\n\n\n<div id=\"sgb-css-id-100\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u8907\u6570\u306e\u5024\u30921\u3064\u306e<code>case<\/code>\u3067\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u7bc4\u56f2\u6307\u5b9a\u306e\u3088\u3046\u306a\u8907\u5408\u6761\u4ef6\u3092\u8868\u73fe\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-103\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-101\">\n<li>\u8907\u5408\u6761\u4ef6\u306e\u8868\u73fe<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-102\">\n<li>\u5024\u306e\u7bc4\u56f2\u6307\u5b9a<\/li>\n<\/div>\n\n\n<li>\u6210\u7e3e\u8a55\u4fa1\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-104\">\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u4f8b10\uff1a switch\u3068\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u306e\u7d44\u307f\u5408\u308f\u305b \u2013 \u6226\u7565\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-105\">\n<p>\u30b7\u30ca\u30ea\u30aa\uff1a\u652f\u6255\u3044\u65b9\u6cd5\u306b\u5fdc\u3058\u3066\u7570\u306a\u308b\u51e6\u7406\u3092\u884c\u3046\u6226\u7565\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u88c5\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=\"\">interface PaymentStrategy {\n    void pay(int amount);\n}\n\nclass CreditCardPayment implements PaymentStrategy {\n    public void pay(int amount) {\n        System.out.println(\"\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u3067\" + amount + \"\u5186\u652f\u6255\u3044\u307e\u3057\u305f\u3002\");\n    }\n}\n\nclass CashPayment implements PaymentStrategy {\n    public void pay(int amount) {\n        System.out.println(\"\u73fe\u91d1\u3067\" + amount + \"\u5186\u652f\u6255\u3044\u307e\u3057\u305f\u3002\");\n    }\n}\n\nclass PayPalPayment implements PaymentStrategy {\n    public void pay(int amount) {\n        System.out.println(\"PayPal\u3067\" + amount + \"\u5186\u652f\u6255\u3044\u307e\u3057\u305f\u3002\");\n    }\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nString paymentMethod = \"credit\";\nint amount = 1000;\n\nPaymentStrategy strategy = switch (paymentMethod) {\n    case \"credit\" -&gt; new CreditCardPayment();\n    case \"cash\" -&gt; new CashPayment();\n    case \"paypal\" -&gt; new PayPalPayment();\n    default -&gt; throw new IllegalArgumentException(\"\u4e0d\u660e\u306a\u652f\u6255\u3044\u65b9\u6cd5: \" + paymentMethod);\n};\n\nstrategy.pay(amount);\n\/\/ \u51fa\u529b: \u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u30671000\u5186\u652f\u6255\u3044\u307e\u3057\u305f\u3002<\/pre>\n\n\n<div id=\"sgb-css-id-106\">\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001<code>switch<\/code>\u5f0f\u3092\u4f7f\u7528\u3057\u3066\u9069\u5207\u306a\u6226\u7565\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u9078\u629e\u3057\u3001\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3092\u6d3b\u7528\u3057\u3066\u7570\u306a\u308b\u652f\u6255\u3044\u65b9\u6cd5\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-109\">\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>\u30dd\u30a4\u30f3\u30c8\uff1a<\/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-107\">\n<li>\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\uff08\u6226\u7565\u30d1\u30bf\u30fc\u30f3\uff09\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-108\">\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u3068<code>switch<\/code>\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b<\/li>\n<\/div>\n\n\n<li>\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u8a2d\u8a08<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-110\">\n<p>\u3053\u308c\u3089\u306e\u4f8b\u3092\u901a\u3058\u3066\u3001<code>switch<\/code>\u6587\u306e\u591a\u69d8\u306a\u4f7f\u7528\u65b9\u6cd5\u3068\u3001\u305d\u308c\u305e\u308c\u306e\u30b7\u30ca\u30ea\u30aa\u3067\u306e\u5229\u70b9\u3092\u5b66\u3073\u307e\u3057\u305f\u3002\u9069\u5207\u306a\u5834\u9762\u3067<code>switch<\/code>\u6587\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3001\u4fdd\u5b88\u6027\u3001\u305d\u3057\u3066\u67d4\u8edf\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u7ae0\u3067\u306f\u3001<code>switch<\/code>\u6587\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-111\">\n<h2 class=\"wp-block-heading\" id=\"i-19\">4. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1aswitch\u6587\u3092\u6700\u5927\u9650\u306b\u6d3b\u7528\u3059\u308b<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-112\">\n<p><code>switch<\/code>\u6587\u306f\u5358\u306a\u308b\u6761\u4ef6\u5206\u5c90\u4ee5\u4e0a\u306e\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3001\u4fdd\u5b88\u6027\u3001\u305d\u3057\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001<code>switch<\/code>\u6587\u306e\u5185\u90e8\u52d5\u4f5c\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u3001\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3001\u305d\u3057\u3066\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-113\">\n<h3 class=\"wp-block-heading\" id=\"i-20\">switch\u6587\u306e\u5185\u90e8\u52d5\u4f5c\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-114\">\n<p><code>switch<\/code>\u6587\u306f\u3001\u4e00\u898b\u5358\u7d14\u306a\u5236\u5fa1\u69cb\u9020\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u305d\u306e\u5185\u90e8\u3067\u306f\u6d17\u7df4\u3055\u308c\u305f\u6700\u9069\u5316\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-115\">\n<li><strong>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u5909\u63db<\/strong>\uff1a \u30b3\u30f3\u30d1\u30a4\u30e9\u306f<code>switch<\/code>\u6587\u3092\u5185\u90e8\u7684\u306b\u30b8\u30e3\u30f3\u30d7\u30c6\u30fc\u30d6\u30eb\u307e\u305f\u306f\u4e00\u9023\u306e<code>if-else<\/code>\u6587\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-116\">\n<li><strong>\u6700\u9069\u5316<\/strong>\uff1a \u591a\u304f\u306e\u5834\u5408\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u5b9a\u6570\u6642\u9593\u306e\u8907\u96d1\u6027\u3092\u6301\u3064\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb\u3092\u751f\u6210\u3057\u3001\u9ad8\u901f\u306a\u5b9f\u884c\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-117\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03<\/strong>\uff1a <code>switch<\/code>\u6587\u306f\u3001\u7279\u306b\u5206\u5c90\u304c\u591a\u3044\u5834\u5408\u3001\u4e00\u822c\u7684\u306b<code>if-else<\/code>\u30c1\u30a7\u30fc\u30f3\u3088\u308a\u3082\u9ad8\u901f\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb\u306b\u3088\u308b\u76f4\u63a5\u30b8\u30e3\u30f3\u30d7\u304c\u53ef\u80fd\u306a\u305f\u3081\u3067\u3059\u3002<\/li>\n<\/div><\/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=\"\">\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u306e\u4f8b\nint value = \/\/ \u4f55\u3089\u304b\u306e\u5024;\n\n\/\/ switch\u6587\u306e\u5834\u5408\nswitch (value) {\n    case 1: \/* \u51e6\u7406 *\/ break;\n    case 2: \/* \u51e6\u7406 *\/ break;\n    \/\/ ... \u591a\u6570\u306ecase\n    default: \/* \u51e6\u7406 *\/ break;\n}\n\n\/\/ if-else\u6587\u306e\u5834\u5408\nif (value == 1) {\n    \/* \u51e6\u7406 *\/\n} else if (value == 2) {\n    \/* \u51e6\u7406 *\/\n} \/\/ ... \u591a\u6570\u306eelse if\nelse {\n    \/* \u51e6\u7406 *\/\n}<\/pre>\n\n\n<div id=\"sgb-css-id-118\">\n<p><code>switch<\/code>\u6587\u306f\u3001\u7279\u306b\u5206\u5c90\u304c\u591a\u3044\u5834\u5408\u306b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4e0a\u306e\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u751f\u6210\u3059\u308b\u30b8\u30e3\u30f3\u30d7\u30c6\u30fc\u30d6\u30eb\u306b\u3088\u308a\u3001\u6761\u4ef6\u306e\u30c1\u30a7\u30c3\u30af\u304c\u5b9a\u6570\u6642\u9593\u3067\u884c\u308f\u308c\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-119\">\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u6307\u91dd<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-120\">\n<p><code>switch<\/code>\u6587\u3092\u52b9\u679c\u7684\u306b\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<ol class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-121\">\n<li><strong>\u8ad6\u7406\u7684\u306acase\u9806\u5e8f<\/strong>\uff1a <code>case<\/code>\u306e\u9806\u5e8f\u3092\u8ad6\u7406\u7684\u307e\u305f\u306f\u983b\u5ea6\u9806\u306b\u914d\u7f6e\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u306b\u306a\u308a\u3001\u8aad\u307f\u3084\u3059\u3055\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-122\">\n<li><strong>default\u30b1\u30fc\u30b9\u306e\u4f7f\u7528<\/strong>\uff1a \u5e38\u306b<code>default<\/code>\u30b1\u30fc\u30b9\u3092\u542b\u3081\u308b\u3053\u3068\u3067\u3001\u4e88\u671f\u3057\u306a\u3044\u5165\u529b\u306b\u5bfe\u3059\u308b\u51e6\u7406\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-123\">\n<li><strong>\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u306e\u660e\u793a<\/strong>\uff1a \u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u3092\u610f\u56f3\u7684\u306b\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u660e\u793a\u7684\u306b\u30b3\u30e1\u30f3\u30c8\u3092\u4ed8\u3051\u307e\u3059\u3002<\/li>\n<\/div><\/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=\"\">   switch (value) {\n       case 1:\n           \/\/ \u51e6\u7406\n           \/\/ \u610f\u56f3\u7684\u306a\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\n       case 2:\n           \/\/ \u5171\u901a\u51e6\u7406\n           break;\n       default:\n           \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u51e6\u7406\n   }<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-124\">\n<li><strong>Enum\u306e\u6d3b\u7528<\/strong>\uff1a \u53ef\u80fd\u306a\u9650\u308aEnum\u578b\u3092\u4f7f\u7528\u3057\u3001\u578b\u5b89\u5168\u6027\u3092\u78ba\u4fdd\u3057\u307e\u3059\u3002<\/li>\n<\/div><\/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=\"\">   enum Day { MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY }\n\n   Day day = Day.MONDAY;\n   switch (day) {\n       case MONDAY:\n       case TUESDAY:\n       case WEDNESDAY:\n       case THURSDAY:\n       case FRIDAY:\n           System.out.println(\"\u5e73\u65e5\");\n           break;\n       case SATURDAY:\n       case SUNDAY:\n           System.out.println(\"\u9031\u672b\");\n           break;\n   }<\/pre>\n\n\n\n<ol start=\"5\" class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-125\">\n<li><strong>\u8907\u96d1\u306a\u51e6\u7406\u306e\u62bd\u51fa<\/strong>\uff1a <code>switch<\/code>\u6587\u5185\u306e\u5404<code>case<\/code>\u306f\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3061\u3001\u8907\u96d1\u306a\u51e6\u7406\u306f\u5225\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u62bd\u51fa\u3057\u307e\u3059\u3002<\/li>\n<\/div><\/ol>\n\n\n<div id=\"sgb-css-id-126\">\n<h3 class=\"wp-block-heading\" id=\"i-22\">common pitfalls\uff1a\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-127\">\n<p><code>switch<\/code>\u6587\u4f7f\u7528\u6642\u306b\u3088\u304f\u3042\u308b\u9593\u9055\u3044\u3068\u3001\u305d\u306e\u56de\u907f\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-128\">\n<p>1.<strong>break\u6587\u306e\u5fd8\u308c<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-129\">\n<li>\u554f\u984c\uff1a \u610f\u56f3\u3057\u306a\u3044\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u306b\u3088\u308b\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-130\">\n<li>\u89e3\u6c7a\u7b56\uff1a \u30a2\u30ed\u30fc\u69cb\u6587\uff08<code>-&gt;<\/code>\uff09\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u5404<code>case<\/code>\u306e\u6700\u5f8c\u306b<code>break<\/code>\u3092\u78ba\u5b9f\u306b\u914d\u7f6e\u3059\u308b\u3002<\/li>\n<\/div><\/ul>\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=\"\">   \/\/ \u826f\u3044\u4f8b\uff08Java 14\u4ee5\u964d\uff09\n   int result = switch (value) {\n       case 1 -&gt; 10;\n       case 2 -&gt; 20;\n       default -&gt; 0;\n   };<\/pre>\n\n\n<div id=\"sgb-css-id-131\">\n<p>2.<strong><strong>default\u30b1\u30fc\u30b9\u306e\u7701\u7565<\/strong><\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-132\">\n<li>\u554f\u984c\uff1a \u4e88\u671f\u3057\u306a\u3044\u5165\u529b\u306b\u5bfe\u3059\u308b\u51e6\u7406\u6f0f\u308c\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-133\">\n<li>\u89e3\u6c7a\u7b56\uff1a \u5e38\u306b<code>default<\/code>\u30b1\u30fc\u30b9\u3092\u542b\u3081\u3001\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u306a\u3069\u9069\u5207\u306b\u5bfe\u51e6\u3059\u308b\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-134\">\n<p>3.<strong>\u904e\u5ea6\u306b\u8907\u96d1\u306aswitch\u6587<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-135\">\n<li>\u554f\u984c\uff1a \u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u306e\u4f4e\u4e0b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-136\">\n<li>\u89e3\u6c7a\u7b56\uff1a \u8907\u96d1\u306a\u6761\u4ef6\u3084\u51e6\u7406\u306f\u5225\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u62bd\u51fa\u3057\u3001<code>switch<\/code>\u6587\u306f\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3064\u3002<\/li>\n<\/div><\/ul>\n\n\n<div id=\"sgb-css-id-137\">\n<p>4.<strong>\u975e\u52b9\u7387\u306a\u6587\u5b57\u5217\u6bd4\u8f03<\/strong><\/p>\n<\/div>\n\n\n<ul class=\"wp-block-list is-style-sango-list-simple\"><div id=\"sgb-css-id-138\">\n<li>\u554f\u984c\uff1a \u6587\u5b57\u5217\u6bd4\u8f03\u304c\u591a\u3044\u5834\u5408\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u4f4e\u4e0b\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-139\">\n<li>\u89e3\u6c7a\u7b56\uff1a \u6587\u5b57\u5217\u6bd4\u8f03\u304c\u591a\u3044\u5834\u5408\u306f\u3001Enum\u306e\u4f7f\u7528\u3084\u4e8b\u524d\u306e\u30cf\u30c3\u30b7\u30e5\u30de\u30c3\u30d7\u5909\u63db\u3092\u691c\u8a0e\u3059\u308b\u3002<\/li>\n<\/div><\/ul>\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=\"\">   \/\/ \u6539\u5584\u524d\n   switch (str) {\n       case \"apple\": \/\/ \u51e6\u7406\n       case \"banana\": \/\/ \u51e6\u7406\n       \/\/ \u591a\u6570\u306e\u6587\u5b57\u5217\u6bd4\u8f03\n   }\n\n   \/\/ \u6539\u5584\u5f8c\n   enum Fruit { APPLE, BANANA, \/* \u4ed6\u306e\u679c\u7269 *\/ }\n   Fruit fruit = Fruit.valueOf(str.toUpperCase());\n   switch (fruit) {\n       case APPLE: \/\/ \u51e6\u7406\n       case BANANA: \/\/ \u51e6\u7406\n       \/\/ Enum\u3092\u4f7f\u7528\u3057\u305f\u6bd4\u8f03\n   }<\/pre>\n\n\n<div id=\"sgb-css-id-140\">\n<h3 class=\"wp-block-heading\" id=\"i-23\">\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-141\">\n<p>\u4ee5\u4e0b\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001<code>switch<\/code>\u6587\u306e\u4f7f\u7528\u3092\u6700\u9069\u5316\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-148\">\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\"><code>switch<\/code> \u6587\u306e\u4f7f\u7528\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/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-142\">\n<li>\u5206\u5c90\u304c3\u3064\u4ee5\u4e0a\u3042\u308b\u5834\u5408\u3001<code>if-else<\/code>\u306e\u4ee3\u308f\u308a\u306b<code>switch<\/code>\u3092\u691c\u8a0e\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-143\">\n<li><code>case<\/code>\u306e\u9806\u5e8f\u3092\u8ad6\u7406\u7684\u307e\u305f\u306f\u983b\u5ea6\u9806\u306b\u914d\u7f6e\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-144\">\n<li><code>default<\/code>\u30b1\u30fc\u30b9\u3092\u5fc5\u305a\u542b\u3081\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-145\">\n<li>\u610f\u56f3\u3057\u306a\u3044\u30d5\u30a9\u30fc\u30eb\u30b9\u30eb\u30fc\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-146\">\n<li>\u8907\u96d1\u306a\u51e6\u7406\u306f\u5225\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u62bd\u51fa\u3059\u308b<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-147\">\n<li>\u53ef\u80fd\u306a\u9650\u308aEnum\u578b\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<\/div>\n\n\n<li>\u6587\u5b57\u5217\u6bd4\u8f03\u304c\u591a\u3044\u5834\u5408\u3001\u6700\u9069\u5316\u3092\u691c\u8a0e\u3059\u308b<\/li>\n<\/ul>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-149\">\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u6ce8\u610f\u70b9\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u3067\u3001<code>switch<\/code>\u6587\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3057\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6b21\u306e\u7ae0\u3067\u306f\u3001<code>switch<\/code>\u6587\u3092\u8d85\u3048\u305f\u9ad8\u5ea6\u306a\u6761\u4ef6\u5206\u5c90\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u63a2\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-150\">\n<h2 class=\"wp-block-heading\" id=\"i-24\">5. \u5fdc\u7528\u7de8\uff1aswitch\u3092\u8d85\u3048\u305f\u6761\u4ef6\u5206\u5c90\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-151\">\n<p>Java\u306e\u9032\u5316\u306b\u4f34\u3044\u3001\u6761\u4ef6\u5206\u5c90\u306e\u5b9f\u88c5\u65b9\u6cd5\u3082\u9032\u5316\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u7ae0\u3067\u306f\u3001\u5f93\u6765\u306e<code>switch<\/code>\u6587\u3092\u8d85\u3048\u305f\u9ad8\u5ea6\u306a\u6761\u4ef6\u5206\u5c90\u30c6\u30af\u30cb\u30c3\u30af\u306b\u3064\u3044\u3066\u63a2\u308a\u307e\u3059\u3002\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3001\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a2\u30d7\u30ed\u30fc\u30c1\u3001\u305d\u3057\u3066\u5c06\u6765\u306e\u5c55\u671b\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-152\">\n<h3 class=\"wp-block-heading\" id=\"i-25\">\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068switch\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u308b\u5f37\u529b\u306a\u578b\u30c1\u30a7\u30c3\u30af<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-153\">\n<p>Java 14\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u6a5f\u80fd\u306f\u3001\u578b\u30c1\u30a7\u30c3\u30af\u3068\u578b\u30ad\u30e3\u30b9\u30c8\u3092\u540c\u6642\u306b\u884c\u3046\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u3001\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\u3068\u5b89\u5168\u6027\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\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=\"\">Object obj = \"Hello, World!\";\nif (obj instanceof String s &amp;&amp; s.length() &gt; 5) {\n    System.out.println(s.toUpperCase());\n}<\/pre>\n\n\n<div id=\"sgb-css-id-154\">\n<p>\u3053\u306e\u6a5f\u80fd\u3092<code>switch<\/code>\u5f0f\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3055\u3089\u306b\u5f37\u529b\u306a\u6761\u4ef6\u5206\u5c90\u304c\u53ef\u80fd\u306b\u306a\u308a\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=\"\">Object obj = 42;\nString result = switch (obj) {\n    case Integer i -&gt; \"\u6574\u6570: \" + i;\n    case String s when s.length() &gt; 5 -&gt; \"\u9577\u3044\u6587\u5b57\u5217: \" + s;\n    case String s -&gt; \"\u77ed\u3044\u6587\u5b57\u5217: \" + s;\n    case null -&gt; \"null\u5024\";\n    default -&gt; obj.toString();\n};\nSystem.out.println(result);  \/\/ \u51fa\u529b: \u6574\u6570: 42<\/pre>\n\n\n<div id=\"sgb-css-id-155\">\n<p>\u3053\u306e\u65b9\u6cd5\u306e\u4e3b\u306a\u5229\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-158\">\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\">\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-156\">\n<li>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u5316\uff1a\u578b\u30c1\u30a7\u30c3\u30af\u3068\u51e6\u7406\u30921\u7b87\u6240\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-157\">\n<li>\u578b\u5b89\u5168\u6027\u306e\u5411\u4e0a\uff1a\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af\u306b\u3088\u308a\u3001\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u3092\u6e1b\u3089\u305b\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li>\u30cd\u30b9\u30c8\u3055\u308c\u305f\u6761\u4ef6\u5206\u5c90\u306e\u524a\u6e1b\uff1a\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u3092\u30d5\u30e9\u30c3\u30c8\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-159\">\n<h3 class=\"wp-block-heading\" id=\"i-26\">\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a2\u30d7\u30ed\u30fc\u30c1\uff1aMap\u3068\u30e9\u30e0\u30c0\u306b\u3088\u308bswitch\u306e\u4ee3\u66ff<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-160\">\n<p>\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u8003\u3048\u65b9\u3092\u53d6\u308a\u5165\u308c\u308b\u3053\u3068\u3067\u3001<code>switch<\/code>\u6587\u306e\u4ee3\u66ff\u3068\u3057\u3066\u3001\u3088\u308a\u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u6761\u4ef6\u5206\u5c90\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Map&lt;String, Integer&gt; scores = Map.of(\"A\", 5, \"B\", 4, \"C\", 3, \"D\", 2, \"F\", 1);\nString grade = \"B\";\nint score = scores.getOrDefault(grade, 0);\nSystem.out.println(\"Score for grade \" + grade + \": \" + score);  \/\/ \u51fa\u529b: Score for grade B: 4<\/pre>\n\n\n<div id=\"sgb-css-id-161\">\n<p>\u3055\u3089\u306b\u3001\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8907\u96d1\u306a\u51e6\u7406\u3082\u7c21\u6f54\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">Map&lt;String, Function&lt;Integer, String&gt;&gt; gradeCalculator = Map.of(\n    \"A\", score -&gt; \"\u512a\u79c0: \" + score,\n    \"B\", score -&gt; \"\u826f\u597d: \" + score,\n    \"C\", score -&gt; \"\u5e73\u5747: \" + score,\n    \"D\", score -&gt; \"\u8981\u6539\u5584: \" + score,\n    \"F\", score -&gt; \"\u4e0d\u5408\u683c: \" + score\n);\n\nString grade = \"B\";\nint score = 85;\nString result = gradeCalculator.getOrDefault(grade, s -&gt; \"\u4e0d\u660e: \" + s).apply(score);\nSystem.out.println(result);  \/\/ \u51fa\u529b: \u826f\u597d: 85<\/pre>\n\n\n<div id=\"sgb-css-id-162\">\n<p>\u3053\u306e\u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u5229\u70b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-165\">\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\">\u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u5229\u70b9<\/div><div class=\"sgb-box-simple__body\" style=\"border-color:var(--wp--preset--color--sango-main);background-color:#FFF\">\n<ol class=\"wp-block-list\"><div id=\"sgb-css-id-163\">\n<li>\u5ba3\u8a00\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\uff1a\u6761\u4ef6\u3068\u7d50\u679c\u306e\u95a2\u4fc2\u3092\u3088\u308a\u76f4\u63a5\u7684\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-164\">\n<li>\u30b3\u30fc\u30c9\u306e\u518d\u5229\u7528\u6027\u5411\u4e0a\uff1a\u6761\u4ef6\u3068\u51e6\u7406\u3092\u30de\u30c3\u30d7\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001\u7570\u306a\u308b\u5834\u6240\u3067\u518d\u5229\u7528\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/div>\n\n\n<li>\u52d5\u7684\u306a\u6761\u4ef6\u5206\u5c90\u306e\u5b9f\u73fe\uff1a\u5b9f\u884c\u6642\u306b\u6761\u4ef6\u3092\u8ffd\u52a0\u30fb\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-166\">\n<h3 class=\"wp-block-heading\" id=\"i-27\">\u5c06\u6765\u306e\u5c55\u671b\uff1aJava\u306e\u9032\u5316\u3068\u5171\u306b\u5909\u308f\u308bswitch\u6587\u306e\u53ef\u80fd\u6027<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-167\">\n<p>Java\u306e\u9032\u5316\u306f\u6b62\u307e\u308b\u3053\u3068\u3092\u77e5\u3089\u305a\u3001\u6761\u4ef6\u5206\u5c90\u306e\u5b9f\u88c5\u65b9\u6cd5\u3082\u3055\u3089\u306b\u9032\u5316\u3057\u3066\u3044\u304f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5c06\u6765\u7684\u306b\u671f\u5f85\u3055\u308c\u308b\u6a5f\u80fd\u3084\u6539\u5584\u70b9\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-170\">\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\">\u5c06\u6765\u306e\u5c55\u671b<\/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-168\">\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306e\u3055\u3089\u306a\u308b\u5f37\u5316\uff1a\u3088\u308a\u8907\u96d1\u306a\u30d1\u30bf\u30fc\u30f3\u3084\u6761\u4ef6\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u30b5\u30dd\u30fc\u30c8\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-169\">\n<li>\u30c7\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30b7\u30e7\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u30b5\u30dd\u30fc\u30c8\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5185\u90e8\u69cb\u9020\u306b\u57fa\u3065\u3044\u305f\u30de\u30c3\u30c1\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u3002<\/li>\n<\/div>\n\n\n<li>\u578b\u63a8\u8ad6\u306e\u6539\u5584\uff1a\u3088\u308a\u5c11\u306a\u3044\u578b\u6307\u5b9a\u3067\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u3092\u8a18\u8ff0\u53ef\u80fd\u306b\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-171\">\n<p>\u3053\u308c\u3089\u306e\u9032\u5316\u306b\u3088\u308a\u3001\u958b\u767a\u8005\u306f\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002\u305f\u3060\u3057\u3001\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u3068\u306e\u4e92\u63db\u6027\u7dad\u6301\u3068\u79fb\u884c\u306e\u5bb9\u6613\u3055\u3082\u91cd\u8981\u306a\u8003\u616e\u70b9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-172\">\n<h3 class=\"wp-block-heading\" id=\"i-28\">\u307e\u3068\u3081<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-173\">\n<p><code>switch<\/code>\u6587\u3092\u8d85\u3048\u305f\u6761\u4ef6\u5206\u5c90\u30c6\u30af\u30cb\u30c3\u30af\u3092\u6d3b\u7528\u3059\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\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3084\u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u5358\u306a\u308b\u69cb\u6587\u306e\u9032\u5316\u3092\u8d85\u3048\u3066\u3001\u554f\u984c\u89e3\u6c7a\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u305d\u306e\u3082\u306e\u3092\u5909\u3048\u308b\u53ef\u80fd\u6027\u3092\u79d8\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-174\">\n<p>\u3053\u308c\u3089\u306e\u65b0\u3057\u3044\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u52b9\u7387\u7684\u306aJava\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u540c\u6642\u306b\u3001\u5f93\u6765\u306e<code>switch<\/code>\u6587\u306e\u4f7f\u7528\u5834\u9762\u3082\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u6700\u9069\u306a\u65b9\u6cd5\u3092\u9078\u629e\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-175\">\n<p>\u6b21\u7ae0\u3067\u306f\u3001\u3053\u308c\u307e\u3067\u306e\u5185\u5bb9\u3092\u7dcf\u62ec\u3057\u3001\u52b9\u679c\u7684\u306a<code>switch<\/code>\u6587\u306e\u4f7f\u3044\u65b9\u3068\u3001\u6761\u4ef6\u5206\u5c90\u30c6\u30af\u30cb\u30c3\u30af\u306e\u9078\u629e\u57fa\u6e96\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-176\">\n<h2 class=\"wp-block-heading\" id=\"i-29\">6. \u307e\u3068\u3081\uff1a\u52b9\u679c\u7684\u306aswitch\u6587\u306e\u4f7f\u3044\u65b9\u3068\u6b21\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n<\/div>\n\n<div id=\"sgb-css-id-177\">\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001Java <code>switch<\/code>\u6587\u306e\u57fa\u672c\u304b\u3089\u5fdc\u7528\u307e\u3067\u3001\u5e45\u5e83\u304f\u30ab\u30d0\u30fc\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u3053\u3067\u306f\u3001\u52b9\u679c\u7684\u306a<code>switch<\/code>\u6587\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u307e\u3068\u3081\u3001\u3055\u3089\u306a\u308b\u5b66\u7fd2\u306e\u305f\u3081\u306e\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u8ab2\u984c\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-178\">\n<h3 class=\"wp-block-heading\" id=\"i-30\">switch\u6587\u30de\u30b9\u30bf\u30fc\u3078\u306e5\u3064\u306e\u30ad\u30fc\u30dd\u30a4\u30f3\u30c8<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-184\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30de\u30b9\u30bf\u30fc\u3078\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-179\">\n<li><strong>\u9069\u5207\u306a\u4f7f\u7528\u5834\u9762\u306e\u7406\u89e3<\/strong>\uff1a<br>\u8907\u6570\u306e\u5b9a\u6570\u5024\u3068\u306e\u6bd4\u8f03\u3084\u5217\u6319\u578b\u306e\u51e6\u7406\u306a\u3069\u3001<code>switch<\/code>\u6587\u304c\u6700\u9069\u306a\u5834\u9762\u3092\u8b58\u5225\u3059\u308b\u80fd\u529b\u3092\u990a\u3044\u307e\u3057\u3087\u3046\u3002\u8907\u96d1\u306a\u6761\u4ef6\u5206\u5c90\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f<code>switch<\/code>\u6587\u306e\u4f7f\u7528\u3092\u691c\u8a0e\u3057\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3068\u4fdd\u5b88\u6027\u3092\u5411\u4e0a\u3055\u305b\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-180\">\n<li><strong>\u6700\u65b0\u306e\u69cb\u6587\u3068\u6a5f\u80fd\u306e\u6d3b\u7528<\/strong>\uff1a<br>Java 12\u4ee5\u964d\u3067\u5c0e\u5165\u3055\u308c\u305f\u30a2\u30ed\u30fc\u69cb\u6587\u3001<code>switch<\/code>\u5f0f\u3001\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u306a\u3069\u306e\u65b0\u6a5f\u80fd\u3092\u7a4d\u6975\u7684\u306b\u6d3b\u7528\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u3089\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3001\u3088\u308a\u30b7\u30f3\u30d7\u30eb\u3067\u8868\u73fe\u529b\u8c4a\u304b\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-181\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u53ef\u8aad\u6027\u306e\u6700\u9069\u5316<\/strong>\uff1a<br>\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u3092\u610f\u8b58\u3057\u3064\u3064\u3001\u4eba\u9593\u306b\u3068\u3063\u3066\u3082\u7406\u89e3\u3057\u3084\u3059\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u6280\u8853\u3092\u78e8\u304d\u307e\u3057\u3087\u3046\u3002<code>case<\/code>\u30e9\u30d9\u30eb\u306e\u9806\u5e8f\u3084<code>default<\/code>\u30b1\u30fc\u30b9\u306e\u9069\u5207\u306a\u914d\u7f6e\u306a\u3069\u3001\u7d30\u90e8\u306b\u3082\u6ce8\u610f\u3092\u6255\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-182\">\n<li><strong>\u30a8\u30e9\u30fc\u51e6\u7406\u3068default\u30b1\u30fc\u30b9\u306e\u9069\u5207\u306a\u4f7f\u7528<\/strong>\uff1a<br>\u4e88\u671f\u3057\u306a\u3044\u5165\u529b\u3084\u4f8b\u5916\u7684\u306a\u30b1\u30fc\u30b9\u3092\u9069\u5207\u306b\u51e6\u7406\u3057\u3001\u30b3\u30fc\u30c9\u306e\u5805\u7262\u6027\u3092\u9ad8\u3081\u307e\u3057\u3087\u3046\u3002<code>default<\/code>\u30b1\u30fc\u30b9\u3092\u5e38\u306b\u542b\u3081\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u306a\u3069\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u78ba\u5b9f\u306b\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/div>\n\n<div id=\"sgb-css-id-183\">\n<li><strong>\u95a2\u6570\u578b\u30a2\u30d7\u30ed\u30fc\u30c1\u3068\u306e\u7d71\u5408<\/strong>\uff1a<br>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001<code>Map<\/code>\u3084\u30e9\u30e0\u30c0\u306a\u3069\u306e\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u6280\u8853\u3068<code>switch<\/code>\u6587\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u80fd\u529b\u3092\u8eab\u306b\u3064\u3051\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u3088\u308a\u67d4\u8edf\u3067\u62e1\u5f35\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/div><\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-185\">\n<h3 class=\"wp-block-heading\" id=\"i-31\">\u3055\u3089\u306a\u308b\u5b66\u7fd2\u30ea\u30bd\u30fc\u30b9\u3068\u5b9f\u8df5\u7684\u306a\u8ab2\u984c<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-186\">\n<p>\u5b66\u7fd2\u3092\u7d99\u7d9a\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<\/div>\n\n\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u5b66\u7fd2\u30ea\u30bd\u30fc\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\">\n<li>\u66f8\u7c4d\uff1a\u300cEffective Java (\u7b2c3\u7248)\u300dby Joshua Bloch<br>Java\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b66\u3076\u305f\u3081\u306e\u5b9a\u756a\u66f8\u7c4d\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u30aa\u30f3\u30e9\u30a4\u30f3\u30b3\u30fc\u30b9\uff1aUdemy\u300cJava Masterclass for Software Developers\u300d<br>Java\u306e\u57fa\u790e\u304b\u3089\u5fdc\u7528\u307e\u3067\u5e45\u5e83\u304f\u30ab\u30d0\u30fc\u3059\u308b\u5305\u62ec\u7684\u306a\u30b3\u30fc\u30b9\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff1aJava Language Specification<br>\u6700\u65b0\u306e\u8a00\u8a9e\u6a5f\u80fd\u306b\u3064\u3044\u3066\u8a73\u7d30\u306b\u5b66\u3079\u308b\u516c\u5f0f\u4ed5\u69d8\u66f8\u3067\u3059\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n\n\n<div id=\"sgb-css-id-187\">\n<p>\u5b9f\u8df5\u7684\u306a\u30b9\u30ad\u30eb\u5411\u4e0a\u306e\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u8ab2\u984c\u306b\u30c1\u30e3\u30ec\u30f3\u30b8\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-188\">\n<div class=\"wp-block-sgb-block-simple sgb-box-simple sgb-box-simple--title-normal sgb-box-simple--with-border\"><div style=\"background-color:var(--wp--preset--color--sango-main);color:#FFF\" class=\"sgb-box-simple__title\">\u30b9\u30ad\u30eb\u5411\u4e0a\u306e\u305f\u3081\u306e\u8ab2\u984c<\/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\">\n<li><strong>\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u306e\u4f5c\u6210<\/strong>\uff1a<br><code>switch<\/code>\u6587\u3092\u4f7f\u7528\u3057\u3066\u3001\u8907\u6570\u306e\u30b3\u30de\u30f3\u30c9\u3092\u51e6\u7406\u3059\u308bCLI\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u88c5\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/li>\n\n\n\n<li><strong>\u72b6\u614b\u30de\u30b7\u30f3\u306e\u5b9f\u88c5<\/strong>\uff1a<br>\u5217\u6319\u578b\uff08<code>Enum<\/code>\uff09\u3068<code>switch<\/code>\u6587\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3001\u7c21\u5358\u306a\u72b6\u614b\u30de\u30b7\u30f3\u3092\u4f5c\u6210\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u306b\u3088\u308a\u3001<code>switch<\/code>\u6587\u3068\u5217\u6319\u578b\u306e\u76f8\u6027\u306e\u826f\u3055\u3092\u5b9f\u611f\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/li>\n\n\n\n<li><strong>\u5f0f\u30d9\u30fc\u30b9\u306e<code>switch<\/code>\u6587\u306e\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0<\/strong>\uff1a<br>\u65e2\u5b58\u306e<code>if-else<\/code>\u6587\u3092<code>switch<\/code>\u5f0f\u3092\u4f7f\u3063\u3066\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3057\u3001\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u3055\u3068\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u7df4\u7fd2\u3092\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ol>\n<\/div><\/div>\n<\/div>\n\n<div id=\"sgb-css-id-189\">\n<p>\u3053\u308c\u3089\u306e\u8ab2\u984c\u306b\u53d6\u308a\u7d44\u3080\u3053\u3068\u3067\u3001<code>switch<\/code>\u6587\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u4f53\u5f97\u3057\u3001\u3088\u308a\u52b9\u679c\u7684\u306bJava\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u884c\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-190\">\n<h3 class=\"wp-block-heading\" id=\"i-32\">\u7d42\u308f\u308a\u306b<\/h3>\n<\/div>\n\n<div id=\"sgb-css-id-191\">\n<p><code>switch<\/code>\u6587\u306f\u3001\u4e00\u898b\u5358\u7d14\u306a\u5236\u5fa1\u69cb\u9020\u3067\u3059\u304c\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3068\u306a\u308a\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u5185\u5bb9\u3092\u5b9f\u8df5\u3057\u3001\u7d99\u7d9a\u7684\u306b\u5b66\u7fd2\u3092\u91cd\u306d\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u6d17\u7df4\u3055\u308c\u305fJava\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u80fd\u529b\u3092\u78e8\u3044\u3066\u3044\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n<div id=\"sgb-css-id-192\">\n<p>Java\u306e\u9032\u5316\u306f\u6b62\u307e\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u65b0\u3057\u3044\u6a5f\u80fd\u3084\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u304c\u5c0e\u5165\u3055\u308c\u308b\u305f\u3073\u306b\u3001\u79c1\u305f\u3061\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u3082\u9032\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u5e38\u306b\u6700\u65b0\u306e\u60c5\u5831\u306b\u30a2\u30f3\u30c6\u30ca\u3092\u5f35\u308a\u3001\u65b0\u3057\u3044\u53ef\u80fd\u6027\u3092\u63a2\u6c42\u3059\u308b\u59ff\u52e2\u3092\u5927\u5207\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<\/div>\n\n\n<p><code>switch<\/code>\u6587\u306e\u5965\u6df1\u3055\u3068\u53ef\u80fd\u6027\u3092\u7406\u89e3\u3057\u3001\u9069\u6750\u9069\u6240\u3067\u4f7f\u3044\u3053\u306a\u305b\u308b\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u306f\u3001\u512a\u308c\u305fJava\u958b\u767a\u8005\u3078\u306e\u4e00\u6b69\u3068\u306a\u308b\u3067\u3057\u3087\u3046\u3002\u3053\u308c\u304b\u3089\u306eJava\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u65c5\u304c\u3001\u3055\u3089\u306b\u5b9f\u308a\u591a\u304d\u3082\u306e\u3068\u306a\u308b\u3053\u3068\u3092\u9858\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":3041,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,66],"tags":[],"class_list":{"0":"post-401","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-java","8":"category-java-syntax"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=401"}],"version-history":[{"count":6,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/401\/revisions"}],"predecessor-version":[{"id":505,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/401\/revisions\/505"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/media\/3041"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}