{"id":1066,"date":"2018-12-03T12:00:40","date_gmt":"2018-12-03T03:00:40","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?p=1066"},"modified":"2025-09-17T13:59:28","modified_gmt":"2025-09-17T04:59:28","slug":"java-enum","status":"publish","type":"post","link":"https:\/\/www.bold.ne.jp\/engineer-club\/java-enum","title":{"rendered":"Java\u306eEnum\u3068\u306f\uff1f\u5217\u6319\u578b\u3068\u547c\u3070\u308c\u308b\u7406\u7531\u3084\u4f7f\u7528\u4f8b\u3001\u4f7f\u3044\u65b9\u3092\u89e3\u8aac"},"content":{"rendered":"<p>Java\u3067\u306e<span>Enum<\/span>\u306f\u300c\u5217\u6319\u578b\u300d\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3059<span>\u2026<\/span>\u3068\u8a00\u308f\u308c\u3066\u3082\u826f\u304f\u5206\u304b\u308a\u307e\u305b\u3093\u3088\u306d\u3002\u5217\u6319\u3068\u8a00\u3046\u8a00\u8449\u81ea\u4f53\u3092\u3001\u65e5\u5e38\u751f\u6d3b\u3067\u306f\u3042\u307e\u308a\u4f7f\u3044\u307e\u305b\u3093\u3002<span>Enum<\/span>\u306f\u3001<span>Java<\/span>\u3067\u5b9a\u6570\u3068\u3057\u3066\u6271\u3048\u308b\u3082\u306e\u3060\u3068\u601d\u3063\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u307e\u305a\u306f<span>OK<\/span>\u3067\u3059\u3002<\/p>\n<p>\u3082\u3061\u308d\u3093\u3001<span>Enum<\/span>\u306f\u5358\u306a\u308b\u5b9a\u6570\u3060\u3051\u306e\u6a5f\u80fd\u3067\u306f\u7d42\u308f\u308a\u307e\u305b\u3093\u3002<span>Enum<\/span>\u306f\u5b9f\u306f\u30af\u30e9\u30b9\u306e\u4e00\u7a2e\u3067\u3059\u304b\u3089\u3001\u3082\u3063\u3068\u3059\u3054\u3044\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3057\u3001\u4e0a\u624b\u304f\u4f7f\u3048\u3070\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u54c1\u8cea\u30a2\u30c3\u30d7\u306b\u52b9\u679c\u7d76\u5927\u3067\u3059<span>!!<\/span><\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u305d\u3093\u306a<strong>Enum\u306b\u3064\u3044\u3066\u521d\u5fc3\u8005\u5411\u3051\u306b<\/strong>\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<span>Enum<\/span>\u306e\u57fa\u672c\u304b\u3089\u6d3b\u7528\u65b9\u6cd5\u307e\u3067\u5e45\u5e83\u304f\u30ab\u30d0\u30fc\u3057\u307e\u3059\u3002<\/p>\n<p>\u203b\u3053\u306e\u8a18\u4e8b\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001<span>Java 10<\/span>\u306e\u74b0\u5883\u3067\u52d5\u4f5c\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#JavaEnum\">\uff11\uff0e\u3010Java\u3011Enum\u306e\u57fa\u672c<\/a><ul><li><a href=\"#-Enum\">\uff11-\uff11\uff0eEnum\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9<\/a><\/li><li><a href=\"#-Enum-2\">\uff11-\uff12\uff0eEnum\u306f\u30af\u30e9\u30b9\u3068\u540c\u3058\u3088\u3046\u306b\u6271\u3048\u308b<\/a><\/li><li><a href=\"#-Enum-3\">\uff11-\uff13\uff0e\u3010\u91cd\u8981\u3011Enum\u306f\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3067\u304d\u306a\u3044<\/a><\/li><\/ul><\/li><li><a href=\"#JavaEnum-2\">\uff12\uff0e\u3010Java\u3011Enum\u306e\u4f7f\u7528\u4f8b<\/a><ul><li><a href=\"#-Enumifswitch\">\uff12-\uff11\uff0eEnum\u540c\u58eb\u306e\u6bd4\u8f03(if\u6587\u30fbswitch\u6587)<\/a><\/li><li><a href=\"#-Enum-4\">\uff12-\uff12\uff0eEnum\u304c\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/a><\/li><\/ul><\/li><li><a href=\"#Enum\">\uff13\uff0e\u3010\u5fdc\u7528\u3011Enum\u306e\u9032\u3093\u3060\u4f7f\u3044\u65b9<\/a><ul><li><a href=\"#-Enum-5\">\uff13-\uff11\uff0eEnum\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u56fa\u6709\u306e\u5024\u3092\u6301\u305f\u305b\u308b<\/a><\/li><li><a href=\"#i\">\uff13-\uff12\uff0e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3054\u3068\u306b\u56fa\u6709\u306e\u30e1\u30bd\u30c3\u30c9\u5b9f\u88c5\u3092\u6301\u305f\u305b\u308b<\/a><\/li><li><a href=\"#-Enum-6\">\uff13-\uff13\uff0eEnum\u306b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5\u3059\u308b<\/a><\/li><li><a href=\"#-EnumEnumSetEnumMap\">\uff13-\uff14\uff0eEnum\u5c02\u7528\u306eEnumSet\/EnumMap\u3092\u6d3b\u7528\u3059\u308b<\/a><\/li><li><a href=\"#-Enum-7\">\uff13-\uff15\uff0eEnum\u3067\u7ba1\u7406\u3059\u308b\u3082\u306e\u306f\u6ce8\u610f\u6df1\u304f\u8003\u3048\u3088\u3046<\/a><\/li><\/ul><\/li><li><a href=\"#JavaEnum-3\">\uff14\uff0e\u3010Java\u3011Enum\u3092\u4f7f\u3046\u3079\u304d\u7406\u7531<\/a><ul><li><a href=\"#-Enum-8\">\uff14-\uff11\uff0eEnum\u306e\u5229\u70b9\u306f\u5b9a\u6570\u306e\u7a2e\u985e\u30fb\u6570\u3092\u660e\u78ba\u306b\u3067\u304d\u308b\u3053\u3068<\/a><\/li><li><a href=\"#-Enum-9\">\uff14-\uff12\uff0eEnum\u3067\u306a\u3044\u5b9a\u6570\u3067\u306f\u5f15\u6570\u3092\u78ba\u5b9a\u30fb\u5f37\u5236\u3067\u304d\u306a\u3044<\/a><\/li><li><a href=\"#-Enum-10\">\uff14-\uff13\uff0eEnum\u3067\u306a\u3044\u623b\u308a\u5024\u3067\u306f\u547c\u3073\u51fa\u3057\u5143\u3067\u306e\u89e3\u91c8\u304c\u5fc5\u8981<\/a><\/li><li><a href=\"#-Enum-11\">\uff14-\uff14\uff0eEnum\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b89\u5168\u6027\u30fb\u78ba\u5b9f\u6027\u3092\u9ad8\u3081\u308b<\/a><\/li><\/ul><\/li><li><a href=\"#i-2\">\uff15\uff0e\u307e\u3068\u3081<\/a><\/li><\/ul><\/div>\n<h2><span id=\"JavaEnum\">\uff11\uff0e\u3010Java\u3011Enum\u306e\u57fa\u672c<\/span><\/h2>\n<p>Enum\u306f<span>enumeration<\/span>\u306e\u7565\u3067\u3001\u300c\u5217\u6319\u3001\u6570\u3048\u3042\u3052\u308b\u3053\u3068\u3001\u76ee\u9332\u3001\u4e00\u89a7\u8868\u300d<span>(Weblio<\/span>\u82f1\u548c\u8f9e\u5178<span>)<\/span>\u3068\u3044\u3046\u610f\u5473\u304c\u3042\u308a\u307e\u3059\u3002\u5206\u304b\u308a\u3084\u3059\u3044\u306e\u306f\u4e00\u89a7\u8868\u3067\u3057\u3087\u3046\u304b\u3002\u3067\u3059\u306e\u3067\u3001<span>Java<\/span>\u306e<span>Enum<\/span>\u3082\u4f55\u304b\u306e\u4e00\u89a7\u3060\u3068\u8003\u3048\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u305d\u3093\u306a<span>Enum<\/span>\u306e\u57fa\u672c\u306b\u3064\u3044\u3066\u304a\u4f1d\u3048\u3057\u307e\u3059\u3002<\/p>\n<h3><span id=\"-Enum\">\uff11-\uff11\uff0eEnum\u306e\u5ba3\u8a00\u306e\u4ed5\u65b9<\/span><\/h3>\n<p>Enum\u306f\u4ee5\u4e0b\u306e\u69cb\u6587\u3067\u5ba3\u8a00\u3057\u307e\u3059\u3002<span>Enum<\/span>\u3092\u5ba3\u8a00\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u540d\u306f\u300c<span>Enum<\/span>\u540d<span>.java<\/span>\u300d\u3068\u306a\u308a\u307e\u3059\u3002\u30af\u30e9\u30b9\u3068\u540c\u3058\u30eb\u30fc\u30eb\u3067\u3059\u306d\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">enum Enum\u540d {\r\n\tEnum\u3068\u3057\u305f\u3044\u5024\u306e\u540d\u524d\u3092\",\"\u533a\u5207\u308a\u3067\u5217\u6319\u3059\u308b\r\n}<\/pre>\n<p>\u4ee5\u4e0b\u304c<span>Enum<\/span>\u306e\u7c21\u5358\u306a\u4f8b\u3067\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u540d\u306f<span>Season.java<\/span>\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u3001\u5b63\u7bc0\u3092<span>Enum<\/span>\u306b\u3057\u3066\u307f\u307e\u3057\u305f\u3002\u3064\u307e\u308a\u3001\u3053\u306e<span>Enum<\/span>\u3067\u306f\u300c\u5b63\u7bc0<span>(Season)<\/span>\u306f\u3001\u6625<span>(SPRING)<\/span>\u30fb\u590f<span>(SUMMER)<\/span>\u30fb\u79cb<span>(AUTUMN)<\/span>\u30fb\u51ac<span>(WINTER)<\/span>\u306e\u3044\u305a\u308c\u304b\u3067\u3042\u308b\u300d\u3068\u5ba3\u8a00\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">enum Season {\r\n\tSPRING,\r\n\tSUMMER,\r\n\tAUTUMN,\r\n\tWINTER\r\n}<\/pre>\n<p>\u30d1\u30c3\u3068\u898b\u3067\u3001\u30af\u30e9\u30b9\u3068\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5ba3\u8a00\u306b\u4f3c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308b\u3067\u3057\u3087\u3046\u304b\u3002<span>&#8220;class&#8221;<\/span>\u306e\u4ee3\u308f\u308a\u306b<span>&#8220;enum&#8221;<\/span>\u3068\u3057\u3066\u3044\u307e\u3059\u3057\u3001<span>SPRING<\/span>\u7b49\u3092\u8a18\u8ff0\u3057\u3066\u3044\u308b\u7b87\u6240\u3082\u666e\u901a\u306e\u30af\u30e9\u30b9\u306a\u3089\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u4f4d\u7f6e\u3067\u3059\u3002<\/p>\n<p>Enum\u3068\u540c\u7b49\u306e\u3053\u3068\u3092\u30af\u30e9\u30b9\u3067\u884c\u3046\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u304c\u6bd4\u8f03\u7684\u8fd1\u3044\u3082\u306e\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u3053\u308c\u306f<span>Enum<\/span>\u3068\u5168\u304f\u540c\u3058\u3067\u306f\u306a\u304f\u3001<span>Enum<\/span>\u72ec\u81ea\u306e\u4fbf\u5229\u306a\u6a5f\u80fd\u3082\u305f\u304f\u3055\u3093\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u304c\u901a\u5e38\u306e\u30af\u30e9\u30b9\u3068<span>Enum<\/span>\u306e\u9055\u3044\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Season {\r\n\tpublic static final Season SPRING = new Season();\r\n\tpublic static final Season SUMMER = new Season();\r\n\tpublic static final Season AUTUMN = new Season();\r\n\tpublic static final Season WINTER = new Season();\r\n\r\n\tprivate Season() {\r\n\t}\r\n}<\/pre>\n<p>\u3061\u306a\u307f\u306b\u3001<span>Enum<\/span>\u306e\u5024\u306e\u540d\u79f0\u3092\u5927\u6587\u5b57\u306b\u3057\u3066\u3044\u308b\u306e\u306f\u3001\u5358\u306b<span>Java<\/span>\u3067\u306f\u5b9a\u6570\u306f\u82f1\u8a9e\u5927\u6587\u5b57\u3068\u3059\u308b\u306e\u304c\u6163\u7fd2\u3060\u304b\u3089\u3067\u3059\u3002\u3067\u3059\u306e\u3067\u3001\u5225\u306b\u5c0f\u6587\u5b57\u3067\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u3067\u3082\u3001<span>Java<\/span>\u306e\u6a19\u6e96<span>API<\/span>\u3067\u3082<span>Enum<\/span>\u306e\u5024\u306f\u5168\u3066\u300c\u5927\u6587\u5b57\u304b\u3064\u5358\u8a9e\u306f<span>&#8220;_&#8221;<\/span>\u3064\u306a\u304e\u300d\u306a\u306e\u3067\u3001\u3053\u306e\u30eb\u30fc\u30eb\u3092\u5b88\u3063\u3066\u304a\u304f\u306e\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h3><span id=\"-Enum-2\">\uff11-\uff12\uff0eEnum\u306f\u30af\u30e9\u30b9\u3068\u540c\u3058\u3088\u3046\u306b\u6271\u3048\u308b<\/span><\/h3>\n<p>Enum\u306e\u4f7f\u3044\u65b9\u306f\u3001\u30af\u30e9\u30b9\u306b\u304a\u3051\u308b<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u307b\u307c\u540c\u3058\u3067\u3059\u3002<span>Enum<\/span>\u306e\u5024<span>\u2026<\/span>\u3059\u306a\u308f\u3061\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u4e0a\u304b\u3089\u306f<span>static<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3068\u540c\u3058\u300c<span>Enum<\/span>\u540d<span>.<\/span>\u5024\u306e\u540d\u79f0\u300d\u3067\u3059\u3002<\/p>\n<p>\u3067\u306f\u3001\u5148\u7a0b\u4f5c\u3063\u305f<span>Enum<\/span>\u306e<span>Season<\/span>\u3092\u4f7f\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">System.out.println(Season.SPRING); \/\/ \u2192 \"SPRING\"\u304c\u51fa\u529b\u3055\u308c\u308b<\/pre>\n<p>\u5f53\u7136\u306a\u304c\u3089\u3001<span>Season<\/span>\u3067\u3042\u3089\u304b\u3058\u3081\u6c7a\u3081\u3089\u308c\u305f\u3082\u306e\u4ee5\u5916\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">System.out.println(Season.ANYTHING); \/\/ \u2192 \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! (\"ANYTHING \u306f\u89e3\u6c7a\u3067\u304d\u306a\u3044\u304b\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u306f\u3042\u308a\u307e\u305b\u3093\")<\/pre>\n<p>Enum\u3067\u5ba3\u8a00\u3057\u305f\u5024\u306f\u3001<span>Enum<\/span>\u81ea\u8eab\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3059\u3002<span>String<\/span>\u3084<span>Integer<\/span>\u306a\u3069\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3067\u3059\u306e\u3067\u3001\u3053\u306e\u4f8b\u3067\u306f\u300c\u5b63\u7bc0\u306e\u4e00\u3064\u3068\u3057\u3066\u306e\u6625\u590f\u79cb\u51ac\u300d\u304c<span>Java<\/span>\u4e0a\u3067\u3082\u305d\u306e\u307e\u307e\u8868\u73fe\u3067\u304d\u3066\u3044\u308b\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">if (Season.SPRING instanceof Season) {  \/\/ \u2192 true\u306b\u306a\u308b\r\n\tSystem.out.println(\"Season.SPRING \u306f Season \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u3059\");\r\n}<\/pre>\n<p>Enum\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u3084\u30af\u30e9\u30b9\u3068\u540c\u3058\u3088\u3046\u306b\u578b\u3068\u3057\u3066\u6271\u3048\u307e\u3059\u306e\u3067\u3001\u5909\u6570\u3068\u3057\u3066\u5ba3\u8a00\u3057\u305f\u308a\u3001<span>Enum<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53c2\u7167\u3055\u305b\u3089\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">Season season1 = Season.SPRING;\r\nSeason season2 = Season.SUMMER;<\/pre>\n<p>\u3082\u3061\u308d\u3093\u3001\u30e1\u30bd\u30c3\u30c9\u3078\u306e\u5f15\u6570\u3084\u623b\u308a\u5024\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class EnumExample {\r\n\tvoid printSeason(Season season) {\r\n\t\tSystem.out.println(season);\r\n\t}\r\n\r\n\tvoid callPrintSeason() {\r\n\t\tprintSeason(Season.SPRING);\r\n\t\tprintSeason(Season.SUMMER);\r\n\t\tprintSeason(Season.AUTUMN);\r\n\t\tprintSeason(Season.WINTER);\r\n\t}\r\n\r\n\tSeason getSeason() {\r\n\t\treturn Season.SPRING;\r\n\t}\r\n}<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<span>Enum<\/span>\u306f\u666e\u901a\u306e\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u540c\u3058\u3088\u3046\u306b\u6271\u3048\u308b\u3082\u306e\u306a\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"-Enum-3\">\uff11-\uff13\uff0e\u3010\u91cd\u8981\u3011<span>Enum<\/span>\u306f\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3067\u304d\u306a\u3044<\/span><\/h3>\n<p>Enum\u304c\u666e\u901a\u306e\u30af\u30e9\u30b9\u3068\u9055\u3046\u6700\u5927\u306e\u30dd\u30a4\u30f3\u30c8\u306f\u300c\u65b0\u3057\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210<span>(new)<\/span>\u304c<span>Enum<\/span>\u306e\u5916\u90e8\u304b\u3089\u306f\u3067\u304d\u306a\u3044\u300d\u3053\u3068\u3067\u3059\u3002\u3064\u307e\u308a\u3001<span>Enum<\/span>\u3068\u3057\u3066\u5b58\u5728\u3057\u5f97\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001\u3042\u3089\u304b\u3058\u3081\u5ba3\u8a00\u3057\u305f\u3082\u306e\u3060\u3051\u306a\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u304c<span>Enum<\/span>\u306e\u7279\u5fb4\u304a\u3088\u3073\u5b58\u5728\u610f\u7fa9\u3067\u3001\u3060\u304b\u3089\u3053\u305d<span>Enum<\/span>\u306e\u5404\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4e2d\u3067<span>1<\/span>\u3064\u3057\u304b\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u300c\u5b9a\u6570\u300d\u3068\u3057\u3066\u6271\u3048\u308b\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">Season season = new Season(); \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc!! (\"\u578b Season \u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3067\u304d\u307e\u305b\u3093\")<\/pre>\n<h2><span id=\"JavaEnum-2\">\uff12\uff0e\u3010Java\u3011Enum\u306e\u4f7f\u7528\u4f8b<\/span><\/h2>\n<h3><span id=\"-Enumifswitch\">\uff12-\uff11\uff0eEnum\u540c\u58eb\u306e\u6bd4\u8f03<span>(if<\/span>\u6587\u30fb<span>switch<\/span>\u6587<span>)<\/span><\/span><\/h3>\n<p>\u6700\u3082\u983b\u7e41\u306b\u4f7f\u3046\u306e\u306f\u3001<span>Enum<\/span>\u578b\u306e\u5024\u540c\u58eb\u3092\u6bd4\u8f03\u3057\u3066\u3001\u3069\u306e<span>Enum<\/span>\u306e\u5024\u304b\u3092\u8abf\u3079\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001<span>if<\/span>\u6587\u30fb<span>switch<\/span>\u6587\u3067\u306e\u4f7f\u7528\u4f8b\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002\u76f4\u611f\u7684\u306b\u300c\u304d\u3063\u3068\u3053\u3046\u306a\u308b\u3060\u308d\u3046\u300d\u3068\u3044\u3046\u3068\u304a\u308a\u306e\u52d5\u304d\u3067\u3059\u3088\u306d<span>?<\/span><\/p>\n<pre class=\"prettyprint lang:default decode:true\">Season season = Season.SPRING;\r\n\r\nif (season == Season.SPRING) {\r\n\tSystem.out.println(\"\u6625!!\"); \/\/ \u2192 \u3053\u3053\u306b\u8a72\u5f53\u3059\u308b\r\n} else if (season == Season.SUMMER) {\r\n\tSystem.out.println(\"\u590f!!\");\r\n} else if (season == Season.AUTUMN) {\r\n\tSystem.out.println(\"\u79cb!!\");\r\n} else if (season == Season.WINTER) {\r\n\tSystem.out.println(\"\u51ac!!\");\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">Season season = Season.SUMMER;\r\n\r\nswitch (season) {\r\ncase SPRING:\r\n\tSystem.out.println(\"\u6625!!\");\r\n\tbreak;\r\ncase SUMMER:\r\n\tSystem.out.println(\"\u590f!!\"); \/\/ \u2192 \u3053\u3053\u306b\u8a72\u5f53\u3059\u308b\r\n\tbreak;\r\ncase AUTUMN:\r\n\tSystem.out.println(\"\u79cb!!\");\r\n\tbreak;\r\ncase WINTER:\r\n\tSystem.out.println(\"\u51ac!!\");\r\n\tbreak;\r\n}<\/pre>\n<h4>\uff12-\uff11-\uff11\uff0e\u3010\u91cd\u8981\u3011<span>Enum<\/span>\u540c\u58eb\u306e\u6bd4\u8f03\u306f<span>==<\/span>\u3067\u78ba\u5b9f\u306b\u884c\u3048\u308b<\/h4>\n<p>Enum\u540c\u58eb\u306e\u6bd4\u8f03\u306f\u3001\u4e0a\u8a18\u4f8b\u306e\u3068\u304a\u308a<span> == <\/span>\u3067\u884c\u3046\u306e\u304c\u304a\u624b\u8efd\u304b\u3064\u78ba\u5b9f\u3067\u3059\u3002<span>equals<\/span>\u3067\u3082\u3044\u3044\u306e\u3067\u3059\u304c\u3001\u30bf\u30a4\u30d7\u91cf\u304c\u591a\u304f\u306a\u308a\u307e\u3059\u3057\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u898b\u305f\u76ee\u304c\u3054\u3061\u3083\u3054\u3061\u3083\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>Java\u306e<span>equals<\/span>\u306b\u3064\u3044\u3066\u3057\u3063\u304b\u308a\u7406\u89e3\u3055\u308c\u3066\u3044\u308b\u65b9\u306f\u3001<span>String<\/span>\u306a\u3069\u306e\u4e8b\u4f8b\u304b\u3089\u3001\u300c<span>==<\/span>\u3060\u3068\u3001\u4fdd\u6301\u3059\u308b\u5024\u306f\u540c\u3058\u3060\u3051\u308c\u3069\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u9055\u3046\u306a\u3089<span>false<\/span>\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u306f<span>?<\/span>\u300d\u3068\u5fc3\u914d\u3055\u308c\u308b\u5411\u304d\u3082\u3042\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3067\u3082<span>Enum<\/span>\u306b\u95a2\u3057\u3066\u306a\u3089\u5fc3\u914d\u7121\u7528\u3067\u3059\u3002<span>Enum<\/span>\u306e\u5024<span>(=<\/span>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9<span>)<\/span>\u306f<span>Java<\/span>\u4e0a\u3067\u5fc5\u305a<span>1<\/span>\u3064\u3060\u3051\u306b\u306a\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u3001<span>Enum<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u6bd4\u8f03\u306f<span>==<\/span>\u3067\u826f\u3044\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"-Enum-4\">\uff12-\uff12\uff0eEnum\u304c\u6301\u3064\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9<\/span><\/h3>\n<p>Enum\u306f\u6a19\u6e96\u3067\u5e7e\u3064\u304b\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u8aac\u660e\u3059\u308b\u3082\u306e\u306f\u3001<span>Enum<\/span>\u3067\u3042\u308c\u3070\u5ba3\u8a00\u30fb\u5b9f\u88c5\u3092\u3057\u306a\u3044\u3067\u3082\u5171\u901a\u7684\u306b\u4f7f\u3048\u308b\u3082\u306e\u3067\u3059\u3002\u4fbf\u5229\u306b\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<h4>\uff12-\uff12-\uff11\uff0ename\u306f<span>Enum<\/span>\u306e\u540d\u79f0\u3092\u623b\u3059<\/h4>\n<p>name\u306f<span>Enum<\/span>\u306e\u5024\u306e\u540d\u79f0\u3092<span>String<\/span>\u3068\u3057\u3066\u623b\u3057\u307e\u3059\u3002\u5909\u6570\u304c\u53c2\u7167\u3057\u3066\u3044\u308b\u306e\u304c\u3069\u306e<span>Enum<\/span>\u306e\u5024\u304b\u3092\u8868\u793a\u30fb\u78ba\u8a8d\u3057\u305f\u308a\u3001\u30ed\u30b0\u306a\u3069\u306b\u51fa\u529b\u3059\u308b\u306e\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">Season season = Season.SUMMER;\r\nSystem.out.println(Season.SPRING.name()); \/\/ \u2192 \"SPRING\"\r\nSystem.out.println(season.name()); \/\/ \u2192 \"SUMMER\"\u3001\u5909\u6570season\u304c\u6307\u3057\u3066\u3044\u308b\u306e\u306fSUMMER\u3067\u3042\u308b\u305f\u3081<\/pre>\n<h4>\uff12-\uff12-\uff12\uff0eordinal\u306f<span>Enum<\/span>\u306e\u5ba3\u8a00\u3055\u308c\u305f\u9806\u756a\u3092\u623b\u3059<\/h4>\n<p>ordinal\u306f\u3001<span>Enum<\/span>\u4e0a\u3067\u5024\u304c\u5ba3\u8a00\u3055\u308c\u305f\u9806\u756a\u3092\u6570\u5024\u3067\u623b\u3057\u307e\u3059\u3002\u9806\u756a\u306f<span>0<\/span>\u59cb\u307e\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">Season season = Season.SUMMER;\r\nSystem.out.println(Season.SPRING.ordinal()); \/\/ \u2192 0\r\nSystem.out.println(Season.SUMMER.ordinal()); \/\/ \u2192 1\r\nSystem.out.println(Season.AUTUMN.ordinal()); \/\/ \u2192 2\r\nSystem.out.println(Season.WINTER.ordinal()); \/\/ \u2192 3\r\nSystem.out.println(season.ordinal()); \/\/ \u2192 1\u3001\u5909\u6570season\u304c\u6307\u3057\u3066\u3044\u308b\u306e\u306fSUMMER\u3067\u3042\u308b\u305f\u3081<\/pre>\n<h4>\uff12-\uff12-\uff13\uff0evalueOf\u306f\u540d\u79f0\u306e\u6587\u5b57\u5217\u306e<span>Enum<\/span>\u3092\u623b\u3059<\/h4>\n<p>valueOf\u306f\u540d\u79f0\u306e\u6587\u5b57\u5217\u306b\u5bfe\u5fdc\u3059\u308b<span>Enum<\/span>\u3092\u623b\u3057\u307e\u3059\u3002<span>valueOf<\/span>\u306f<span>Enum<\/span>\u306e<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u306a\u306e\u3067\u3001\u5024\u306b\u5bfe\u3057\u3066\u306f\u4f7f\u3046\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u8a00\u8449\u3060\u3068\u5c11\u3057\u308f\u304b\u308a\u3065\u3089\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u4f8b\u3092\u898b\u308c\u3070\u4e00\u76ee\u77ad\u7136\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String name = \"AUTUMN\";\r\nSeason season = Season.valueOf(name);\r\nSystem.out.println(Season.valueOf(\"SPRING\")); \/\/ \u2192 SPRING\r\nSystem.out.println(Season.valueOf(\"SUMMER\")); \/\/ \u2192 SUMMER\r\nSystem.out.println(Season.valueOf(\"AUTUMN\")); \/\/ \u2192 AUTUMN\r\nSystem.out.println(Season.valueOf(\"WINTER\")); \/\/ \u2192 WINTER\r\nSystem.out.println(season); \/\/ \u2192 AUTUMN\u3001\u5909\u6570season\u304c\u6307\u3057\u3066\u3044\u308b\u306e\u306fAUTUMN\u3067\u3042\u308b\u305f\u3081<\/pre>\n<p>\u3053\u308c\u306f\u3001\u4f8b\u3048\u3070\u30e1\u30bd\u30c3\u30c9\u306b<span>String<\/span>\u3068\u3057\u3066\u6e21\u3055\u308c\u305f\u540d\u79f0\u304b\u3089<span>Enum<\/span>\u306e\u5024\u3092\u53d6\u5f97\u3059\u308b\u306e\u306b\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<p>\u3061\u306a\u307f\u306b\u3001\u5ba3\u8a00\u3055\u308c\u305f\u3082\u306e\u4ee5\u5916\u306e\u540d\u79f0\u3092\u6e21\u3059\u3068\u4f8b\u5916\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">Season season = Season.valueOf(\"NOT_DEFINED_IN_ENUM\"); \/\/ \u2192 IllegalArgumentException\u304c\u767a\u751f\u3059\u308b<\/pre>\n<h4>\uff12-\uff12-\uff14\uff0evalues\u306f\u5168\u3066\u306e<span>Enum<\/span>\u306e\u914d\u5217\u3092\u8fd4\u3059<\/h4>\n<p>values\u306f\u5168\u3066\u306e<span>Enum<\/span>\u306e\u914d\u5217\u3092\u8fd4\u3059<span>static<\/span>\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u5168\u3066\u306e\u5024\u306b\u5bfe\u3057\u3066\u4f55\u304b\u51e6\u7406\u3092\u3057\u305f\u3044\u5834\u5408\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">Season[] seasons = Season.values();\r\n\r\nfor (Season season : seasons) {\r\n\tSystem.out.println(season); \/\/ \u2192 SPRING\u3001SUMMER\u3001AUTUMN\u3001WINTER\u304c\u9806\u306b\u8868\u793a\u3055\u308c\u308b\r\n}<\/pre>\n<h2><span id=\"Enum\">\uff13\uff0e\u3010\u5fdc\u7528\u3011<span>Enum<\/span>\u306e\u9032\u3093\u3060\u4f7f\u3044\u65b9<\/span><\/h2>\n<h3><span id=\"-Enum-5\">\uff13-\uff11\uff0eEnum\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u56fa\u6709\u306e\u5024\u3092\u6301\u305f\u305b\u308b<\/span><\/h3>\n<p>Enum\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306b\u56fa\u6709\u306e\u5024\u3092\u6301\u305f\u305b\u305f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u51e6\u7406\u7d50\u679c\u306e\u7a2e\u985e\u3092\u8868\u3059<span>Enum<\/span>\u3067\u3042\u308c\u3070\u3001\u305d\u308c\u3092\u6570\u5024\u3067\u8868\u3057\u305f\u30b3\u30fc\u30c9\u3092\u6301\u305f\u305b\u308b\u306a\u3069\u3067\u3059\u3002<\/p>\n<p>\u305d\u306e\u5834\u5408\u306f\u3001<span>Enum<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u306e\u304c\u304a\u52e7\u3081\u3067\u3059\u3002\u5b9f\u306f<span>Enum<\/span>\u3082\u30af\u30e9\u30b9\u306e\u4e00\u7a2e\u306a\u306e\u3067\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u3001\u30e1\u30bd\u30c3\u30c9\u306a\u3069\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">enum ResultCode {\r\n\tNORMAL(100),\r\n\tWARNING(200),\r\n\tABNORMAL(999);\r\n\r\n\tprivate final int code;\r\n\r\n\tprivate ResultCode(int code) {\r\n\t\tthis.code = code;\r\n\t}\r\n\r\n\tint getCode() {\r\n\t\treturn code;\r\n\t}\r\n}<\/pre>\n<p>Enum\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u3066\u3044\u308b\u306e\u3060\u3068\u89e3\u91c8\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3067\u3059\u304b\u3089\u3001\u5f15\u6570\u3092\u6301\u3064\u72ec\u81ea\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u5b9a\u7fa9\u3059\u308b\u306a\u3089\u3001\u5f15\u6570\u3092\u4e0e\u3048\u308b\u306e\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u5b9a\u7fa9\u306e\u3068\u3053\u308d\u306b\u306a\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306e\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u3092<span>private final<\/span>\u3068\u3057\u3066\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067\u306e\u8a2d\u5b9a\u3092\u5f37\u5236\u3057\u3066\u3044\u308b\u3053\u3068\u3068\u3001\u8a2d\u5b9a\u5024\u3092\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5f15\u6570\u3068\u3057\u3066\u3044\u308b\u3053\u3068\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5024\u306b\u30a2\u30af\u30bb\u30b9\u3059\u305f\u3081\u306e<span>getter<\/span>\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u3063\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u3053\u306e<span>Enum<\/span>\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4f7f\u3048\u307e\u3059\u3002\u305d\u306e\u4ed6\u306e<span>Enum<\/span>\u306e\u6a19\u6e96\u6a5f\u80fd<span>(name<\/span>\u3001<span>ordinal<\/span>\u7b49<span>)<\/span>\u306f\u3001\u666e\u901a\u306e<span>Enum<\/span>\u3068\u540c\u69d8\u306b\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">System.out.println(ResultCode.NORMAL.getCode()); \/\/ \u2192 100\r\nSystem.out.println(ResultCode.WARNING.getCode()); \/\/ \u2192 200\r\nSystem.out.println(ResultCode.ABNORMAL.getCode()); \/\/ \u2192 999<\/pre>\n<h3><span id=\"i\">\uff13-\uff12\uff0e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3054\u3068\u306b\u56fa\u6709\u306e\u30e1\u30bd\u30c3\u30c9\u5b9f\u88c5\u3092\u6301\u305f\u305b\u308b<\/span><\/h3>\n<p>Enum\u306b\u306f\u524d\u8ff0\u306e\u3068\u304a\u308a\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u305d\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u3092<span>Enum<\/span>\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3054\u3068\u306b\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3055\u305b\u3089\u308c\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u306e\u632f\u308b\u821e\u3044\u3092\u81ea\u7531\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u308b\u306e\u304c\u3001<span>Enum<\/span>\u304c<span>String<\/span>\u3084<span>int<\/span>\u306b\u3088\u308b\u5b9a\u6570\u4ee5\u4e0a\u306e\u5f37\u529b\u306a\u6a5f\u80fd\u3092\u6301\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u306e\u8a3c\u660e\u3067\u3059\u3002<\/p>\n<p>\u3084\u308a\u65b9\u306f\u4e8c\u7a2e\u985e\u3042\u308a\u3001\u6a19\u6e96\u52d5\u4f5c\u3092\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3057\u3066\u500b\u5225\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u65b9\u6cd5\u3001\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3057\u3066\u500b\u5225\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u5b9f\u88c5\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u305d\u306e\u4e8c\u7a2e\u985e\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u6a19\u6e96\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3057\u3001\u7279\u5b9a\u306e\u5024\u3067\u3060\u3051\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u5834\u5408\r\nenum ResultCode {\r\n\tNORMAL {\r\n\t\tint doSomething() {\r\n\t\t\treturn 12345;\r\n\t\t}\r\n\t},\r\n\tWARNING,\r\n\tABNORMAL;\r\n\r\n\tint doSomething() {\r\n\t\treturn 99999;\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">System.out.println(ResultCode.NORMAL.doSomething()); \/\/ \u2192 67890\r\nSystem.out.println(ResultCode.WARNING.doSomething()); \/\/ \u2192 12345\r\nSystem.out.println(ResultCode.ABNORMAL.doSomething()); \/\/ \u2192 12345<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ Enum\u306babstract\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3057\u3001\u5168\u3066\u306e\u5024\u3067\u5b9f\u88c5\u3055\u305b\u308b\u5834\u5408\r\nenum ResultCode {\r\n\tNORMAL {\r\n\t\tint doSomething() {\r\n\t\t\treturn 12345;\r\n\t\t}\r\n\t},\r\n\tWARNING {\r\n\t\tint doSomething() {\r\n\t\t\treturn 67890;\r\n\t\t}\r\n\t},\r\n\tABNORMAL {\r\n\t\tint doSomething() {\r\n\t\t\treturn 99999;\r\n\t\t}\r\n\t};\r\n\r\n\tabstract int doSomething();\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">System.out.println(ResultCode.NORMAL.doSomething()); \/\/ \u2192 12345\r\nSystem.out.println(ResultCode.WARNING.doSomething()); \/\/ \u2192 67890\r\nSystem.out.println(ResultCode.ABNORMAL.doSomething()); \/\/ \u2192 99999<\/pre>\n<h3><span id=\"-Enum-6\">\uff13-\uff13\uff0eEnum\u306b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5\u3059\u308b<\/span><\/h3>\n<p>Enum\u306f\u7d99\u627f<span>(extends)<\/span>\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3067\u3059\u304c\u3001\u4f55\u304b\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5<span>(implements)<\/span>\u306f\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u304c\u3042\u308b\u3068\u3057\u3066\u3001\u305d\u308c\u3092<span>Enum<\/span>\u306b\u5b9f\u88c5\u3057\u3066\u307f\u307e\u3059\u3002\u3084\u308a\u65b9\u3068\u3057\u3066\u306f\u4e0a\u8ff0\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u5b9f\u88c5\u30fb\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u306e\u65b9\u6cd5\u304c\u4f7f\u3048\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3084\u308a\u65b9\u3092\u9078\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">interface DoSomething {\r\n\tint doSomething();\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u2460ResultCode\u81ea\u8eab\u3067\u5b9f\u88c5\u3059\u308b\u5834\u5408\r\nenum ResultCode implements DoSomething {\r\n\tNORMAL,\r\n\tWARNING,\r\n\tABNORMAL;\r\n\r\n\tpublic int doSomething() {\r\n\t\treturn 99999;\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u2461ResultCode\u3067\u5b9f\u88c5\u3057\u3001\u4e00\u90e8\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306f\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u5834\u5408\r\nenum ResultCode implements DoSomething {\r\n\tNORMAL {\r\n\t\tpublic int doSomething() {\r\n\t\t\treturn 12345;\r\n\t\t}\r\n\t},\r\n\tWARNING,\r\n\tABNORMAL;\r\n\r\n\tpublic int doSomething() {\r\n\t\treturn 99999;\r\n\t}\r\n}<\/pre>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u2462ResultCode\u306e\u5404\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u56fa\u6709\u306e\u5b9f\u88c5\u3092\u6301\u305f\u305b\u308b\u5834\u5408\r\nenum ResultCode implements DoSomething {\r\n\tNORMAL {\r\n\t\tpublic int doSomething() {\r\n\t\t\treturn 12345;\r\n\t\t}\r\n\t},\r\n\tWARNING {\r\n\t\tpublic int doSomething() {\r\n\t\t\treturn 67890;\r\n\t\t}\r\n\t},\r\n\tABNORMAL {\r\n\t\tpublic int doSomething() {\r\n\t\t\treturn 99999;\r\n\t\t}\r\n\t};\r\n}<\/pre>\n<p>\u5f53\u7136\u3001\u3053\u306e\u5834\u5408\u306f<span>Enum<\/span>\u306e\u5404\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u3001<span>Enum<\/span>\u3067\u3082\u3042\u308a\u4f55\u304b\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u3067\u3082\u3042\u308b\u306e\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">System.out.println(ResultCode.NORMAL.doSomething()); \/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u305b\u308b\r\n\r\nDoSomething doSomething = ResultCode.WARNING; \/\/ \u578b\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3068\u3057\u3066\u3082\u6271\u3048\u308b\r\n\r\nif (doSomething instanceof DoSomething) { \/\/ \u5f53\u7136instanceof\u3082\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3068\u3057\u3066\u6271\u3048\u308b\r\n\tSystem.out.println(doSomething.doSomething());\r\n}<\/pre>\n<h3><span id=\"-EnumEnumSetEnumMap\">\uff13-\uff14\uff0eEnum\u5c02\u7528\u306e<span>EnumSet\/EnumMap<\/span>\u3092\u6d3b\u7528\u3059\u308b<\/span><\/h3>\n<p>Enum\u306f<span>Set<\/span>\u306e\u8981\u7d20\u3084<span>Map<\/span>\u306e\u30ad\u30fc\u3068\u3057\u3066\u3082\u4f7f\u3048\u307e\u3059\u3002<span>HashSet<\/span>\u3084<span>HashMap<\/span>\u3067\u3082\u5b9f\u7528\u4e0a\u554f\u984c\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001<span>Enum<\/span>\u5c02\u7528\u306e<span>EnumSet<\/span>\u3001<span>EnumMap<\/span>\u304c\u5b58\u5728\u3057\u307e\u3059\u306e\u3067\u6d3b\u7528\u3057\u3066\u3082\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u305d\u308c\u305e\u308c\u306e\u5c02\u7528<span>Set\/Map<\/span>\u3092\u4f7f\u3046\u30e1\u30ea\u30c3\u30c8\u306f\u3001\u51e6\u7406\u306e\u9ad8\u901f\u6027\u3067\u3059\u3002<span>Enum<\/span>\u306f\u53d6\u308a\u5f97\u308b\u5024\u306e\u6570\u304c\u56fa\u5b9a\u3067\u3042\u308b\u3053\u3068\u3092\u524d\u63d0\u306b\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u304c\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>EnumSet\u306f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068<span>new<\/span>\u3092\u7528\u3044\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u751f\u6210\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001<span>of<\/span>\u3092\u4f7f\u3063\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3059\u308b\u5f62\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65e6\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3057\u3066\u3057\u307e\u3048\u3070\u3001\u666e\u901a\u306e<span>Set<\/span>\u3068\u3057\u3066\u4f7f\u3048\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ Season\u306e\u307f\u4fdd\u6301\u3067\u304d\u308bSet\u3092\u53d6\u5f97\u3059\u308b\r\nSet&lt;Season&gt; enumSet = EnumSet.of(Season.SPRING, Season.WINTER);\r\n\r\nSystem.out.println(enumSet.contains(Season.SPRING));\r\nenumSet.forEach(System.out::println);<\/pre>\n<p>EnumMap\u306f<span>new<\/span>\u3057\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u3053\u308c\u3082\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u72ec\u7279\u3067\u3059\u304c\u3001\u4f7f\u3044\u65b9\u306f\u666e\u901a\u306e<span>Map<\/span>\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">\/\/ \u30ad\u30fc\u304cSeason\u3001\u5024\u304cString\u306eEnumMap\u3092\u751f\u6210\u3059\u308b\r\nMap&lt;Season, String&gt; enumMap = new EnumMap&lt;Season, String&gt;(Season.class);\r\nenumMap.put(Season.SPRING, \"\u6625\");\r\nenumMap.put(Season.SUMMER, \"\u590f\");\r\nenumMap.put(Season.WINTER, \"\u51ac\");\r\n\r\nSystem.out.println(enumMap.containsKey(Season.SPRING)); \/\/ \u2192 true\r\nSystem.out.println(enumMap.containsKey(Season.AUTUMN)); \/\/ \u2192 false\r\n\r\nfor (Entry&lt;Season, String&gt; e : enumMap.entrySet()) {\r\n\tSystem.out.println(e.getKey() + \" is \" + e.getValue());\r\n}<\/pre>\n<h3><span id=\"-Enum-7\">\uff13-\uff15\uff0eEnum\u3067\u7ba1\u7406\u3059\u308b\u3082\u306e\u306f\u6ce8\u610f\u6df1\u304f\u8003\u3048\u3088\u3046<\/span><\/h3>\n<p>Enum\u306f\u5024\u3092\u3042\u3089\u304b\u3058\u3081\u6c7a\u3081\u3089\u308c\u308b\u306e\u304c\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u3067\u3059\u304c\u3001\u4e00\u3064\u306e<span>Enum<\/span>\u306b\u6570\u5341\uff5e\u6570\u767e\u4ee5\u4e0a\u3082\u5024\u304c\u3042\u308b\u3068\u3001\u3055\u3059\u304c\u306b\u4f7f\u3044\u52dd\u624b\u3084\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u304c\u60aa\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u3001\u8907\u6570\u306e\u7570\u306a\u308b\u610f\u5473\u306b\u5206\u5272\u3067\u304d\u308b\u3088\u3046\u306a\u3082\u306e\u3082\u4e00\u3064\u306e<span>Enum<\/span>\u306b\u7121\u7406\u306b\u62bc\u3057\u8fbc\u3081\u3088\u3046\u3068\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u610f\u5473\u7684\u306a\u89b3\u70b9\u304b\u3089\u898b\u76f4\u3057\u3092\u884c\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>Enum\u306f\u3044\u308f\u3086\u308b\u5b9a\u6570\u30af\u30e9\u30b9\u3084\u5b9a\u6570\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u3088\u3046\u306b\u3001\u4e00\u3064\u306e\u3082\u306e\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u4e0a\u3067\u5b9a\u6570\u3068\u3057\u3066\u4f7f\u3046\u3067\u3042\u308d\u3046\u5168\u3066\u306e\u7a2e\u985e\u306e\u5024\u3092\u62bc\u3057\u8fbc\u3080\u306e\u306b\u4f7f\u3046\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u306e\u8a18\u4e8b\u306e\u4f8b\u306e\u3068\u304a\u308a\u3001\u5b63\u7bc0\u3084\u51e6\u7406\u7d50\u679c\u306a\u3069\u3001\u610f\u5473\u306e\u3042\u308b\u3082\u306e\u3054\u3068\u306b<span>Enum<\/span>\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u308c\u305e\u308c\u306b\u9069\u5207\u306a\u5024\u3092\u5b9a\u7fa9\u3057\u3066\u4f7f\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u8a73\u7d30\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3084\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u306a\u3069\u3092<span>Enum<\/span>\u3067\u5168\u3066\u8868\u73fe\u3059\u308b\u306e\u3082\u3001\u5024\u306e\u6570\u304c\u591a\u304f\u306a\u308b\u539f\u56e0\u3067\u3059\u3002\u305d\u306e\u5834\u5408\u306f\u3069\u3053\u307e\u3067\u304c\u5177\u4f53\u7684\u306a<span>Enum<\/span>\u3068\u3057\u3066\u8868\u73fe\u3059\u3079\u304d\u3082\u306e\u3067\u3001\u3069\u3053\u304b\u3089\u304c\u30de\u30cb\u30e5\u30a2\u30eb\u3084<span>Javadoc<\/span>\u3067\u8868\u73fe\u3059\u3079\u304d\u3082\u306e\u304b\u8003\u3048\u307e\u3057\u3087\u3046\u3002\u4f8b\u3048\u3070\u30a8\u30e9\u30fc\u306e\u5206\u985e\u306f<span>Enum<\/span>\u3068\u3057\u3001\u8a73\u7d30\u30b3\u30fc\u30c9\u306f<span>String<\/span>\u3084<span>int<\/span>\u3068\u3059\u308b\u306a\u3069\u3067\u3059\u3002<\/p>\n<h2><span id=\"JavaEnum-3\">\uff14\uff0e\u3010Java\u3011Enum\u3092\u4f7f\u3046\u3079\u304d\u7406\u7531<\/span><\/h2>\n<h3><span id=\"-Enum-8\">\uff14-\uff11\uff0eEnum\u306e\u5229\u70b9\u306f\u5b9a\u6570\u306e\u7a2e\u985e\u30fb\u6570\u3092\u660e\u78ba\u306b\u3067\u304d\u308b\u3053\u3068<\/span><\/h3>\n<p>\u524d\u8ff0\u3057\u305f\u3068\u304a\u308a\u3001<span>Enum<\/span>\u306e\u4e3b\u306a\u7528\u9014\u306f\u5b9a\u6570\u3067\u3059\u3002\u5b9a\u6570\u306e\u7a2e\u985e\u30fb\u6570\u304c\u3042\u3089\u304b\u3058\u3081\u660e\u78ba\u306b\u306a\u3063\u3066\u3044\u3066\u3001\u3057\u304b\u3082\u6c7a\u3081\u3089\u308c\u305f\u4ee5\u5916\u306e\u5024\u306f\u53d6\u308a\u3048\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u3066\u3044\u308b\u306e\u304c\u6700\u5927\u306e\u5229\u70b9\u3067\u3059\u3002<\/p>\n<p>\u5b9a\u6570\u306f<span>static final<\/span>\u306a<span>String<\/span>\u3084<span>int<\/span>\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3082\u540c\u3058\u3088\u3046\u306a\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001<span>Enum<\/span>\u306b\u52a3\u3063\u3066\u3044\u308b\u306e\u306f\u5024\u306e\u7bc4\u56f2\u3084\u7a2e\u985e\u3092\u78ba\u5b9f\u30fb\u660e\u78ba\u306b\u5236\u9650\u3067\u304d\u306a\u3044\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u3082\u3046\u5c11\u3057\u8a00\u8449\u3092\u8db3\u3059\u306a\u3089\u3070\u3001<span>String<\/span>\u3084<span>int<\/span>\u3067\u306f\u53d6\u308a\u5f97\u308b\u5024\u30fb\u8868\u73fe\u3067\u304d\u308b\u7bc4\u56f2\u304c\u5e83\u3059\u304e\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u306a\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"-Enum-9\">\uff14-\uff12\uff0eEnum\u3067\u306a\u3044\u5b9a\u6570\u3067\u306f\u5f15\u6570\u3092\u78ba\u5b9a\u30fb\u5f37\u5236\u3067\u304d\u306a\u3044<\/span><\/h3>\n<p>\u4f8b\u3048\u3070\u3001\u5b63\u7bc0\u3092<span>String<\/span>\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u6570\u5316\u3057\u305f\u3068\u3057\u307e\u3059\u3002\u3053\u306e<span>String<\/span>\u3084<span>int<\/span>\u306e\u5e83\u57df\u5909\u6570\u306b\u3088\u308b\u5b9a\u6570\u306f<span>C<\/span>\u8a00\u8a9e\u306a\u3069\u3067\u306f\u3054\u304f\u666e\u901a\u3067\u3001<span>Java<\/span>\u306e\u73fe\u5834\u3067\u3082\u666e\u901a\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u4f7f\u3044\u65b9\u306f<span> Constant.SEASON_SPRING <\/span>\u3067\u3001\u898b\u305f\u76ee\u4e0a\u306f<span>Enum<\/span>\u3068\u3042\u307e\u308a\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class Constant {\r\n\tpublic static final String SEASON_SPRING = \"SPRING\";\r\n\tpublic static final String SEASON_SUMMER = \"SUMMER\";\r\n\tpublic static final String SEASON_AUTUMN = \"AUTUMN\";\r\n\tpublic static final String SEASON_WINTER = \"WINTER\";\r\n\r\n\tpublic static final String RESULT_NORMAL = \"100\";\r\n\tpublic static final String RESULT_WARNING = \"200\";\r\n\tpublic static final String RESULT_ABNORMAL = \"999\";\r\n}<\/pre>\n<p>\u4ee5\u4e0b\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5f15\u6570\u3068\u3057\u3066<span>Constant.SEASON_SPRING<\/span>\uff5e<span>WINTER<\/span>\u306e\u3044\u305a\u308c\u304b\u3092\u6e21\u3055\u308c\u308b\u3053\u3068\u3092\u524d\u63d0\u306b\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u4ed6\u306e<span>String<\/span>\u3092\u6e21\u3057\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002<span>Java<\/span>\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u89b3\u70b9\u3067\u306f\u3001<span>String<\/span>\u3067\u3042\u308c\u3070\u4f55\u3067\u3082\u3088\u3044\u304b\u3089\u3067\u3059\u3002\u3067\u3059\u304b\u3089\u3001\u30e1\u30bd\u30c3\u30c9\u5074\u3067\u306e\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u9808\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class EnumExample {\r\n\tstatic void judgeSeason(String season) {\r\n\t\tswitch (season) {\r\n\t\tcase Constant.SEASON_SPRING:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tcase Constant.SEASON_SUMMER:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tcase Constant.SEASON_AUTUMN:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tcase Constant.SEASON_WINTER:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tdefault:\r\n\t\t\tnew IllegalArgumentException(\"\u60f3\u5b9a\u5916\u306e\u5024\u3067\u3059!!\");\r\n\t\t}\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tjudgeSeason(Constant.SEASON_SPRING); \/\/ \u30e1\u30bd\u30c3\u30c9\u3067\u610f\u56f3\u3057\u3066\u3044\u308b\u547c\u3073\u51fa\u3057\u65b9\r\n\t\tjudgeSeason(Constant.RESULT_ABNORMAL); \/\/ \u3053\u308c\u3067\u3082\u3082\u3061\u308d\u3093\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u901a\u308b\u3057\u3001\u5b9f\u884c\u3082\u3067\u304d\u308b\r\n\t\tjudgeSeason(\"\u3042\u3044\u3046\u3048\u304a\"); \/\/ String\u3067\u3055\u3048\u3042\u308c\u3070\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u901a\u3063\u3066\u3057\u307e\u3046\u3057\u3001\u5b9f\u884c\u3082\u3067\u304d\u308b\r\n\t}\r\n}<\/pre>\n<p>\u305d\u308c\u306b\u3001\u60f3\u5b9a\u5916\u306e\u5024\u304c\u6e21\u3055\u308c\u305f\u5834\u5408\u3067\u3082\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u52d5\u304b\u3057\u3066\u307f\u306a\u3044\u3068\u5206\u304b\u308a\u307e\u305b\u3093\u3002\u4e00\u4eba\u3060\u3051\u3067\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u3063\u3066\u3044\u308b\u306a\u3089\u554f\u984c\u306f\u307e\u3060\u5c11\u306a\u3044\u306e\u3067\u3059\u304c\u3001\u8907\u6570\u4eba\u3067\u4f5c\u3063\u3066\u3044\u308b\u3068\u3053\u306e\u610f\u601d\u758e\u901a\u304c\u5730\u5473\u306b\u5927\u5909\u3067\u3059\u3002\u307e\u305f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u516c\u958b\u3055\u308c\u4e0d\u7279\u5b9a\u591a\u6570\u306e\u4eba\u304c\u4f7f\u3046\u3088\u3046\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u306a\u3089\u3082\u3063\u3068\u5927\u5909\u3067\u3059\u3002<\/p>\n<h3><span id=\"-Enum-10\">\uff14-\uff13\uff0eEnum\u3067\u306a\u3044\u623b\u308a\u5024\u3067\u306f\u547c\u3073\u51fa\u3057\u5143\u3067\u306e\u89e3\u91c8\u304c\u5fc5\u8981<\/span><\/h3>\n<p>\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u304c<span>Enum<\/span>\u3067\u3042\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002<span>Enum<\/span>\u3067\u3042\u308c\u3070\u3001\u623b\u308a\u5024\u304c\u3042\u3089\u304b\u3058\u3081\u6c7a\u3081\u3089\u308c\u305f\u5024\u306e\u3044\u305a\u308c\u304b\u3067\u3042\u308b\u3053\u3068\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u78ba\u5b9a\u3059\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u306f\u3001\u30e1\u30bd\u30c3\u30c9<span>getSeason<\/span>\u3067<span>Constant.SEASON_SPRING<\/span>\uff5e<span>WINTER<\/span>\u4ee5\u5916\u3092<span>return<\/span>\u3057\u3066\u3082\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u4f8b\u3048\u3070\u3001<span>&#8220;&#8221;<\/span>\u3060\u3063\u305f\u308a\u3001<span>&#8220;AAAAAA&#8221;<\/span>\u3060\u3063\u305f\u3068\u3057\u3066\u3082\u3067\u3059\u3002\u623b\u308a\u5024\u304c<span>String<\/span>\u3067\u3055\u3048\u3042\u308c\u3070\u3044\u3044\u304b\u3089\u3067\u3059\u3002\u3053\u308c\u3082\u5b9f\u884c\u3057\u3066\u307f\u306a\u3044\u3068\u6b63\u3057\u304f\u5b9f\u88c5\u3067\u304d\u3066\u3044\u308b\u304b\u5206\u304b\u308a\u307e\u305b\u3093\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">class EnumExample {\r\n\tstatic String getSeason() {\r\n\t\t\/\/ \u4f55\u304c\u3057\u304b\u306e\u7d50\u679c\u3001Constant.SEASON_SPRING\uff5eWINTER\u306e\u3044\u305a\u308c\u304b\u3092return\u3059\u308b\u4ed5\u69d8\u3068\u3057\u3066\u3044\u308b\r\n\t\treturn ...;\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tString season = getSeason(); \/\/ \u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306eString\u306f\u3001\u672c\u5f53\u306bConstant.SEASON_SPRING\uff5eWINTER\u306e\u3069\u308c\u304b\u304b?\r\n\r\n\t\t\/\/ \u30c1\u30a7\u30c3\u30af\u51e6\u7406\u3092\u308f\u3056\u308f\u3056\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u306a\u3044\r\n\t\tswitch (season) {\r\n\t\tcase Constant.SEASON_SPRING:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tcase Constant.SEASON_SUMMER:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tcase Constant.SEASON_AUTUMN:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tcase Constant.SEASON_WINTER:\r\n\t\t\tSystem.out.println(\"\u6625!!\");\r\n\t\t\tbreak;\r\n\t\tdefault:\r\n\t\t\tnew IllegalArgumentException(\"\u60f3\u5b9a\u5916\u306e\u5024\u3067\u3059!!\");\r\n\t\t}\r\n\t}\r\n}<\/pre>\n<p>\u5f15\u6570\u306e\u6642\u3068\u540c\u69d8\u306b\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3092\u4fe1\u7528\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u306f\u4f7f\u3046\u5074\u304b\u3089\u306f\u5206\u304b\u308a\u307e\u305b\u3093\u3002\u3067\u3059\u306e\u3067\u3001\u6700\u60aa\u306f\u60f3\u5b9a\u901a\u308a\u306e\u7d50\u679c\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<h3><span id=\"-Enum-11\">\uff14-\uff14\uff0eEnum\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b89\u5168\u6027\u30fb\u78ba\u5b9f\u6027\u3092\u9ad8\u3081\u308b<\/span><\/h3>\n<p>Enum\u3067\u3042\u308c\u3070\u3001<span>Enum<\/span>\u3067\u5ba3\u8a00\u3057\u305f\u5024\u306e\u3044\u305a\u308c\u304b\u3060\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u78ba\u5b9a\u3057\u307e\u3059\u3002<span>Enum<\/span>\u3068\u3057\u3066\u306f\u3042\u3089\u304b\u3058\u3081\u5ba3\u8a00\u3057\u3066\u3044\u306a\u3044\u5024\u306f\u4f7f\u3048\u307e\u305b\u3093\u3057\u3001\u81ea\u5206\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3067\u304d\u306a\u3044\u304b\u3089\u3067\u3059\u3002\u5148\u307b\u3069\u306e\u3088\u3046\u306b<span>String<\/span>\u3067\u3084\u308a\u3068\u308a\u3059\u308b\u3088\u308a\u3082\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b89\u5168\u6027\u30fb\u78ba\u5b9f\u6027\u304c\u9ad8\u307e\u308b\u3053\u3068\u304c\u5206\u304b\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u307e\u305f\u3001\u305f\u3060\u306e<span>String<\/span>\u3084<span>int<\/span>\u306e\u5024\u3067\u3042\u308b\u3088\u308a\u3082\u3001<span>Enum<\/span>\u306a\u3089\u5c02\u7528\u306e\u30c7\u30fc\u30bf\u578b\u3067\u3042\u308b\u3053\u3068\u304c\u660e\u78ba\u306b\u306a\u308a\u307e\u3059\u3002\u5b9a\u6570\u3068\u3057\u3066\u7528\u3044\u308b\u306a\u3089\u3001<span>Enum<\/span>\u306e\u65b9\u304c\u3088\u308a\u671b\u307e\u3057\u3044\u59ff\u3060\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>String\u3084<span>int<\/span>\u3067\u5b9a\u6570\u3092\u8868\u73fe\u3059\u308b\u306e\u306f\u3001\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u7fd2\u6163\u3092\u6301\u3061\u8fbc\u3093\u3067\u3044\u305f\u308a\u3001<span>Java<\/span>\u306b<span>Enum<\/span>\u304c\u306a\u304b\u3063\u305f\u6642\u4ee3\u306e\u540d\u6b8b\u3067\u3059\u3002<span>Java<\/span>\u306e\u6a19\u6e96<span>API<\/span>\u3067\u3082\u3001<span>Enum<\/span>\u5c0e\u5165\u5f8c\u306f\u591a\u304f\u306e<span>Enum<\/span>\u304c\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4eca<span>Java<\/span>\u3067\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u3059\u308b\u306a\u3089\u3070\u3001<span>Enum<\/span>\u3092\u5927\u3044\u306b\u6d3b\u7528\u3059\u308b\u306e\u304c\u671b\u307e\u3057\u3044\u30b9\u30bf\u30a4\u30eb\u306a\u306e\u3067\u3059\u3002<\/p>\n<h2><span id=\"i-2\">\uff15\uff0e\u307e\u3068\u3081<\/span><\/h2>\n<p>Enum\u306f<span>Java<\/span>\u3067\u5b9a\u6570\u3092\u8868\u73fe\u3059\u308b\u305f\u3081\u306b\u7528\u3044\u307e\u3059\u3002<span>Enum<\/span>\u306f\u5ba3\u8a00\u306e\u4ed5\u65b9\u3082\u4f7f\u3044\u65b9\u3082\u7c21\u5358\u3067\u3059\u304c\u3001\u5b9f\u4f53\u306f\u30af\u30e9\u30b9\u306a\u306e\u3067\u3001\u3084\u308d\u3046\u3068\u601d\u3048\u3070\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u306a\u3069\u306e\u69d8\u3005\u306a\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u304c\u884c\u3048\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>Enum\u304c<span>Java<\/span>\u306b\u8ffd\u52a0\u3055\u308c\u305f\u306e\u306f\u3001\u5f93\u6765\u306e\u5b9a\u6570\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u3067\u306f\u3001\u3069\u3046\u3057\u3066\u3082\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u54c1\u8cea\u306b\u554f\u984c\u304c\u6b8b\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>Enum\u304c\u8ffd\u52a0\u3055\u308c\u305f\u80cc\u666f\u3084\u610f\u56f3\u3092\u7406\u89e3\u3057\u3066\u3001\u52b9\u679c\u7684\u306b<span>Enum<\/span>\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u3001\u30d0\u30b0\u3084\u610f\u56f3\u3057\u306a\u3044\u52d5\u4f5c\u3092\u672a\u7136\u306b\u9632\u6b62\u3067\u304d\u307e\u3059\u3002\u305c\u3072\u6d3b\u7528\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046<span>!!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306eEnum\u306f\u300c\u5217\u6319\u578b\u300d\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3059\u2026\u3068\u8a00\u308f\u308c\u3066\u3082\u826f\u304f\u5206\u304b\u308a\u307e\u305b\u3093\u3088\u306d\u3002\u5217\u6319\u3068\u8a00\u3046\u8a00\u8449\u81ea\u4f53\u3092\u3001\u65e5\u5e38\u751f\u6d3b\u3067\u306f\u3042\u307e\u308a\u4f7f\u3044\u307e\u305b\u3093\u3002Enum\u306f\u3001Java\u3067\u5b9a\u6570\u3068\u3057\u3066\u6271\u3048\u308b\u3082\u306e\u3060\u3068\u601d\u3063\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u3001\u307e\u305a\u306fOK\u3067\u3059\u3002 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":804,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/1066"}],"collection":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/comments?post=1066"}],"version-history":[{"count":7,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/1066\/revisions"}],"predecessor-version":[{"id":5709,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/1066\/revisions\/5709"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media\/804"}],"wp:attachment":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media?parent=1066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=1066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}