{"id":20241,"date":"2017-07-19T04:29:05","date_gmt":"2017-07-18T19:29:05","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=20241"},"modified":"2024-05-06T11:41:05","modified_gmt":"2024-05-06T02:41:05","slug":"%e3%80%90java%e5%85%a5%e9%96%80%e3%80%91switch%e6%96%87%e3%81%a7string%e5%9e%8b%e3%81%ae%e6%96%87%e5%ad%97%e5%88%97%e3%82%92%e4%bd%bf%e3%81%86%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/20241","title":{"rendered":"\u3010Java\u3011switch\u6587\u3067String\u306e\u6587\u5b57\u5217\u3092\u6271\u3046\u65b9\u6cd5"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\uff01\u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\u306e\u6843\u592a\u90ce\u3067\u3059\u3002<\/p>\n

Java\u306eswitch\u6587\u3067String\u578b\u306e\u6587\u5b57\u5217\u3092\u4f7f\u3044\u305f\u3044\u5834\u9762\u304c\u5c11\u306a\u304b\u3089\u305a\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u305d\u306e\u3088\u3046\u306a\u3068\u304d\u3001\u3075\u3068\u4f7f\u3044\u65b9\u304c\u5408\u3063\u3066\u3044\u308b\u304b\u4e0d\u5b89\u306b\u611f\u3058\u305f\u3053\u3068\u306f\u306a\u3044\u3067\u3059\u304b\uff1f<\/p>\n

\u305d\u306e\u4e0d\u5b89\u3092\u89e3\u6c7a\u3059\u308b\u306e\u304c\u672c\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<\/p>\n

\u30fb\u305d\u3082\u305d\u3082switch\u3068\u306f<\/strong><\/span><\/p>\n

\u30fbJava\u306eswitch\u6587\u3067String\u578b\u306e\u6587\u5b57\u5217\u3067\u6761\u4ef6\u5206\u5c90<\/strong><\/span><\/p>\n

\u3068\u3044\u3046\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u3001<\/p>\n

\u30fbJava6\u4ee5\u524d\u3067Enum\u3092\u4f7f\u3063\u3066\u6587\u5b57\u5217\u3092\u6271\u3046\u65b9\u6cd5<\/strong><\/span><\/p>\n

\u30fbswitch\u3067exception\u304c\u767a\u751f\uff01\uff01\u305d\u306e\u539f\u56e0\u3068\u5bfe\u7b56<\/strong><\/span><\/p>\n

\u306a\u3069\u306e\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u76f4\u9762\u3057\u305d\u3046\u306a\u554f\u984c\u306b\u95a2\u3057\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

switch\u6587\u306eString\u578b\u6587\u5b57\u5217\u306e\u5bfe\u5fdc\u306b\u3064\u3044\u3066\u6b63\u3057\u304f\u7406\u89e3\u3057\u3001\u5fc5\u8981\u306a\u5834\u9762\u3067\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\uff01<\/p>\n

\u306a\u304a\u3001Java\u306e\u8a18\u4e8b\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u3061\u3089<\/a>\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u305d\u3082\u305d\u3082switch\u3068\u306f<\/h2>\n

\u89e3\u8aac\u3092\u9032\u3081\u3066\u3044\u304f\u524d\u306b\u3001\u3082\u3057\u3042\u306a\u305f\u304cswitch\u6587<\/strong><\/span>\u306e\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304c\u305d\u3082\u305d\u3082\u5206\u304b\u3089\u306a\u3044\u3068\u3044\u3046\u72b6\u614b\u3067\u3042\u308c\u3070\u3001\u307e\u305a\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u3092\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u4e0b\u3055\u3044\u306d\u3002<\/p>\n

\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u672c\u8a18\u4e8b\u3092\u3088\u308a\u30b9\u30e0\u30fc\u30ba\u306b\u8aad\u3080\u3053\u3068\u304c\u3067\u304d\u3001\u3042\u306a\u305f\u306e\u982d\u306e\u4e2d\u306e\u30e2\u30e4\u30e2\u30e4\u304c\u3088\u308a\u30b9\u30c3\u30ad\u30ea\u3057\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n

[\u982d\u306e\u4e2d\u3092\u30b9\u30c3\u30ad\u30ea\u3057\u305f\u3044\u65b9\u306f\u3053\u3061\u3089\uff01]
\n \n

\n
\n
\n \n <\/div>\n
\n
\u3010Java\u5165\u9580\u3011switch-case\u6587\u306e\u4f7f\u3044\u65b9\u7dcf\u307e\u3068\u3081<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n <\/p>\n

Java\u306eswitch\u6587\u3067String\u578b\u306e\u6587\u5b57\u5217\u3067\u6761\u4ef6\u5206\u5c90<\/h2>\n

switch\u6587\u305d\u306e\u3082\u306e\u306b\u5bfe\u3059\u308b\u6e96\u5099\u306f\u30d0\u30c3\u30c1\u30ea\u3067\u3059\u306d\u3002<\/p>\n

\u3067\u306f\u3001\u6539\u3081\u3066switch\u6587\u3067String\u578b\u306e\u6587\u5b57\u5217\u3092\u6271\u3044\u6761\u4ef6\u5206\u5c90\u3055\u305b\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

Java7\u304b\u3089switch\u6587\u304cString\u578b\u306e\u6587\u5b57\u5217\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

Java6\u4ee5\u524d\u3067\u306fswitch\u6587\u306e\u5f0f\u306bString\u578b\u306e\u6587\u5b57\u5217\u306f\u4f7f\u3048\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n

\u53c2\u8003\u307e\u3067\u306bswitch\u6587\u3067\u4f7f\u3048\u308b\u578b\u306f\u3001int\u3001short\u3001char\u3001byte\u3001enum\u3001String<\/strong><\/span>\u3067\u3059\u3002<\/p>\n

\u307e\u305f\u6761\u4ef6\u5206\u5c90\u304c\u591a\u3044\u51e6\u7406\u306e\u5834\u5408\u3001if\u6587\u3088\u308a\u3082switch\u6587\u306e\u65b9\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u826f\u3044\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u305d\u3057\u3066\u3001switch\u6587\u306e\u6587\u5b57\u5217\u306e\u6bd4\u8f03\u306b\u306fequals\u30e1\u30bd\u30c3\u30c9\u304c\u5185\u90e8\u3067\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u305d\u306e\u305f\u3081\u3001equals\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058\u3088\u3046\u306b\u6bd4\u8f03\u3059\u308b\u6587\u5b57\u5217\u306e\u5927\/\u5c0f\u6587\u5b57\u304c\u533a\u5225\u3055\u308c\u308b<\/strong><\/span>\u306e\u3067\u3001\u305d\u306e\u70b9\u306f\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u3067\u306f\u5177\u4f53\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u3092\u307f\u3066\u3044\u304f\u3053\u3068\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

public class Main {\r\n    public static void main(String[] args) throws Exception {\r\n\r\n        \/\/ \u597d\u304d\u306a\u8272\u306b\u3088\u308b\u6027\u683c\u5224\u65ad\r\n        String answer = \"\u9752\u8272\";\r\n \r\n        switch (answer) {\r\n        case \"\u8d64\u8272\":\r\n            System.out.println(answer + \":\" + \"\u60c5\u71b1\u7684\u306a\u30ea\u30fc\u30c0\u30bf\u30a4\u30d7\");\r\n            break;\r\n        case \"\u9ec4\u8272\":\r\n            System.out.println(answer + \":\" + \"\u98df\u3044\u3057\u3093\u574a\u306a\u548c\u307e\u305b\u30bf\u30a4\u30d7\");\r\n            break;\r\n        case \"\u9752\u8272\":\r\n            System.out.println(answer + \":\" + \"\u6c88\u7740\u51b7\u9759\u306a\u53c2\u8b00\u30bf\u30a4\u30d7\");\r\n            break;\r\n        case \"\u7d2b\u8272\":\r\n            System.out.println(answer + \":\" + \"\u5c11\u3057\u659c\u3081\u306b\u69cb\u3048\u305f\u5b64\u72ec\u30bf\u30a4\u30d7\");\r\n            break;\r\n        case \"\u767d\u8272\":\r\n            System.out.println(answer + \":\" + \"\u6b63\u7fa9\u611f\u304c\u5f37\u3044\u7387\u5148\u30bf\u30a4\u30d7\");\r\n            break;\r\n        case \"\u9ed2\u8272\":\r\n            System.out.println(answer + \":\" + \"\u3042\u3048\u3066\u60aa\u3092\u3082\u53d7\u3051\u5165\u308c\u308b\u61d0\u306e\u5e83\u3044\u30bf\u30a4\u30d7\");\r\n            break;\r\n        default:\r\n            System.out.println(answer + \":\" + \"\u9078\u3076\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u512a\u67d4\u4e0d\u65ad\u30bf\u30a4\u30d7\");\r\n        }\r\n    }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
\u9752\u8272:\u6c88\u7740\u51b7\u9759\u306a\u53c2\u8b00\u30bf\u30a4\u30d7<\/pre>\n
\u4e0a\u8a18\u306e\u901a\u308a\u3001swtich(\u5909\u6570)\u306e\u5909\u6570\u7b87\u6240\u306bString\u578b\u306e\u6587\u5b57\u5217\u3092\u5165\u308c\u3066\u6761\u4ef6\u5206\u5c90\u3067\u304d\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n
\u305d\u3057\u3066\u5148\u307b\u3069\u6761\u4ef6\u5206\u5c90\u304c\u591a\u3044\u5834\u5408\u306fif\u6587\u3088\u308a\u3082switch\u6587\u306e\u65b9\u304c\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u826f\u3044\u3053\u3068\u3092\u4f1d\u3048\u307e\u3057\u305f\u304c\u3001\u3055\u3089\u306b\u3082\u3046\u4e00\u3064switch\u6587\u306e\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u306f\u5b9f\u88c5\u30df\u30b9\u304c\u8d77\u3053\u308a\u306b\u304f\u3044<\/strong><\/span>\u3053\u3068\u3067\u3059\u3002<\/p>\n
\u3069\u3046\u3044\u3046\u3053\u3068\u304b\u3068\u8a00\u3044\u307e\u3059\u3068\u3001switch\u6587\u3067\u306fcase\u306b\u6307\u5b9a\u3059\u308b\u5024\u304c\u91cd\u8907\u3057\u3066\u3044\u308b\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u304c\u767a\u751f<\/strong><\/span>\u3057\u307e\u3059\u3002<\/p>\n
\u3064\u307e\u308a\u3001\u6761\u4ef6\u5206\u5c90\u306e\u9078\u629e\u80a2\u304c\u591a\u3044\u5834\u5408\u306b\u3001\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u304c\u9078\u629e\u80a2\u3092\u66f8\u304d\u9593\u9055\u3048\u305f\u3053\u3068\u306b\u6c17\u304c\u4ed8\u304f\u4ed5\u7d44\u307f\u304cif\u6587\u306b\u306f\u7121\u304f\u3001switch\u6587\u306b\u306f\u6709\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n
\u4e0a\u8a18\u306e\u51e6\u7406\u3092if\u6587\u3067\u66f8\u3044\u305f\u969b\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3092\u3057\u3066\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3067\u691c\u77e5\u3057\u3066\u3082\u3089\u3048\u306a\u3044<\/strong><\/span>\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n
public class Main {\r\n    public static void main(String[] args) throws Exception {\r\n\r\n        \/\/ \u597d\u304d\u306a\u8272\u306b\u3088\u308b\u6027\u683c\u5224\u65ad\r\n        String answer = \"\u9752\u8272\";\r\n \r\n        if(answer.equals(\"\u8d64\u8272\")){\r\n            System.out.println(answer + \":\" + \"\u60c5\u71b1\u7684\u306a\u30ea\u30fc\u30c0\u30bf\u30a4\u30d7\");\r\n        }else if(answer.equals(\"\u9752\u8272\")){\r\n            System.out.println(answer + \":\" + \"\u98df\u3044\u3057\u3093\u574a\u306a\u548c\u307e\u305b\u30bf\u30a4\u30d7\");\r\n        }else if(answer.equals(\"\u9752\u8272\")){ \r\n            System.out.println(answer + \":\" + \"\u6c88\u7740\u51b7\u9759\u306a\u53c2\u8b00\u30bf\u30a4\u30d7\");\r\n        }\r\n    }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
\/\/\u30ad\u30e3\u30e9\u304c\u5d29\u58ca\u3001\u3001\r\n\u9752\u8272:\u98df\u3044\u3057\u3093\u574a\u306a\u548c\u307e\u305b\u30bf\u30a4\u30d7<\/pre>\n
\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u6761\u4ef6\u5206\u5c90\u304c\u591a\u3044\u6642\u306fswitch\u6587\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3092\u30aa\u30b9\u30b9\u30e1<\/strong><\/span>\u3057\u307e\u3059\uff01<\/p>\n
Java6\u4ee5\u524d\u3067Enum\u3092\u4f7f\u3063\u3066\u6587\u5b57\u5217\u3092\u6271\u3046\u65b9\u6cd5<\/h2>\n
Java6\u4ee5\u524d\u306e\u74b0\u5883\u3067\u6587\u5b57\u5217\u3092switch\u6587\u3067\u6bd4\u8f03\u3059\u308b\u306b\u306f\u3001Enum\u3092\u4f7f\u3046\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u8a73\u3057\u3044\u65b9\u6cd5\u306f\u3053\u3061\u3089\u306e\u8a18\u4e8b\u3067\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n            \n                
\n                
\n                    
\n                    \n                    <\/div>\n                    
\n                    
\u30108\u5206\u3067\u308f\u304b\u308b\u3011Enum\u30af\u30e9\u30b9\u3067\u6587\u5b57\u5217\u3092\u4f7f\u3063\u305f\u6bd4\u8f03\u30fb\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\uff01<\/div>\n                    
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n
\u3053\u308c\u307e\u3067\u89e3\u8aac\u3057\u3066\u304d\u305f\u901a\u308a\u3001\u6700\u65b0\u306eJava\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306fswitch\u6587\u306b\u3066\u6761\u4ef6\u5206\u5c90\u306b\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u304c\u3001Java6\u4ee5\u524d\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/strong><\/span>\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u305d\u306e\u70ba\u3001Java6\u4ee5\u524d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u74b0\u5883\u3067\u306fEnum\u3092\u5229\u7528\u3057\u3066\u64ec\u4f3c\u7684\u306b\u6587\u5b57\u5217\u5206\u5c90<\/strong><\/span>\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n
switch\u3067exception\u304c\u767a\u751f\uff01\uff01\u305d\u306e\u539f\u56e0\u3068\u5bfe\u7b56<\/h2>\n
\u4ee5\u524d\u306b\u7b46\u8005\u304c\u5b9f\u969b\u306b\u76f4\u9762\u3057\u305f\u30d0\u30b0\u306b\u3001\u3053\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u6709\u308b\u30b5\u30a4\u30c8\u3078\u306e\u6d41\u5165\u7d4c\u8def\uff08\u30e6\u30fc\u30b6\u304c\u3069\u306e\u30da\u30fc\u30b8\u304b\u3089\u81ea\u524d\u306e\u30da\u30fc\u30b8\u306b\u5165\u3063\u3066\u304d\u305f\u304b\uff09\u3092\u8abf\u3079\u308b\u305f\u3081\u306b\u3001\u30ea\u30d5\u30a1\u30e9\u30fc\uff08\u30da\u30fc\u30b8\u9077\u79fb\u5143\u306e\u60c5\u5831\uff09\u3092\u53d6\u5f97\u3057\u51e6\u7406\u3059\u308b\u5b9f\u88c5\u3092\u884c\u3044\u307e\u3057\u305f\u3002<\/p>\n
\u30ea\u30d5\u30a1\u30e9\u30fc\u306f\u901a\u5e38\u3067\u3042\u308c\u3070\u4f55\u304c\u3057\u304b\u306e\u5024\u304c\u5165\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u3067\u3059\u304c\u3001\u4f8b\u3048\u3070\u81ea\u524d\u306e\u30da\u30fc\u30b8\u3092\u30d6\u30c3\u30af\u30de\u30fc\u30af\u3068\u3057\u3066\u304a\u6c17\u306b\u5165\u308a\u8ffd\u52a0\u3092\u3057\u3066\u3044\u3066\u3001\u6570\u65e5\u5f8c\u306b\u30d6\u30c3\u30af\u30de\u30fc\u30af\u304b\u3089\u81ea\u524d\u306e\u30da\u30fc\u30b8\u306b\u9077\u79fb\u3057\u3066\u304d\u305f\u5834\u5408\u306f\u3001\u30ea\u30d5\u30a1\u30e9\u30fc\u304cnull\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/strong><\/span><\/p>\n
\u305d\u3053\u3092\u8003\u616e\u305b\u305a\u306bswitch\u6587\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3068\u5b9f\u884c\u6642\u306bNullPointerException<\/strong><\/span>\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n
public class Main {\r\n    public static void main(String[] args) throws Exception {\r\n\r\n        String referrer = getReferrer();\r\n \r\n        switch (referrer) {        \/\/\u3053\u3053\u3067\u5b9f\u884c\u6642\u30a8\u30e9\u30fc\u767a\u751f\r\n        case \"https:\/\/www.google.co.jp\/\":\r\n            System.out.println(\"\u30b0\u30fc\u30b0\u30eb\u304b\u3089\u9077\u79fb\");\r\n            break;\r\n        case \"https:\/\/www.bing.com\/\":\r\n            System.out.println(\"bing\u304b\u3089\u9077\u79fb\");\r\n            break;\r\n        default:\r\n            System.out.println(\"\u305d\u306e\u307b\u304b\u306e\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u304b\u3089\u9077\u79fb\");\r\n        }\r\n    }\r\n    \r\n    \/*\u9077\u79fb\u5143\u306eURL\u3092\u53d6\u5f97\u3059\u308b\u51e6\u7406*\/\r\n    private static String getReferrer(){\r\n        \r\n        String ref = \"\";\r\n        \/*\r\n        \u3053\u3053\u306b\u30ea\u30d5\u30a1\u30e9\u30fc\u53d6\u5f97\u51e6\u7406\r\n        *\/\r\n        \/\/\u4e0a\u8a18\u306e\u51e6\u7406\u306e\u7d50\u679c\u3067null\u304c\u5f97\u3089\u308c\u305f\u3068\u4eee\u5b9a\r\n        ref = null;\r\n        \r\n        return ref;\r\n    }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/p>\n
Exception in thread \"main\" java.lang.NullPointerException\r\n    at Main.main(Main.java:9)<\/pre>\n
\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001switch\u6587\u306e\u524d\u306bnull\u30c1\u30a7\u30c3\u30af<\/strong><\/span>\u3092\u5165\u308c\u3001null\u306e\u5834\u5408\u306f\u5206\u5c90\u3055\u305b\u305f\u3044\u6587\u5b57\u5217\u306b\u5909\u63db\u3057\u3066\u304a\u304f\u3068\u3044\u3046\u3053\u3068\u304c\u5bfe\u7b56\u3068\u3057\u3066\u6709\u52b9\u3067\u3059\u3002<\/p>\n
        String referrer = getReferrer();\r\n        \r\n        \/\/null\u30c1\u30a7\u30c3\u30af\r\n        if(referrer == null){\r\n           referrer = \"\u305d\u306e\u4ed6\";\r\n        }\r\n \r\n        switch (referrer) {\r\n        case \"https:\/\/www.google.co.jp\/\":\r\n            System.out.println(\"\u30b0\u30fc\u30b0\u30eb\u304b\u3089\u9077\u79fb\");\r\n            break;\r\n        case \"https:\/\/www.bing.com\/\":\r\n            System.out.println(\"bing\u304b\u3089\u9077\u79fb\");\r\n            break;\r\n        default:\r\n            System.out.println(\"\u305d\u306e\u307b\u304b\u306e\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u304b\u3089\u9077\u79fb\");\r\n        }<\/pre>\n
switch\u6587\u3067\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u969b\u306b\u306f\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306a\u539f\u56e0\u3084\u5bfe\u7b56\u304c\u5b9f\u65bd\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u307f\u3066\u4e0b\u3055\u3044\u306d\u3002<\/p>\n
\u307e\u3068\u3081<\/h2>\n
\u3044\u304b\u304c\u3067\u3057\u305f\u304b\uff1f<\/p>\n
\u4eca\u56de\u306fswitch\u6587\u3067String\u578b\u306e\u6587\u5b57\u5217\u3092\u4f7f\u3046\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n
\u6587\u5b57\u5217\u304cnull\u306e\u5834\u5408\u306f\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u306e\u3067\u6ce8\u610f<\/strong><\/span>\u3057\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n
\u3082\u3057switch\u6587\u306e\u6587\u5b57\u5217\u306e\u6271\u3044\u65b9\u306b\u3064\u3044\u3066\u5fd8\u308c\u3066\u3057\u307e\u3063\u305f\u3089\u3053\u306e\u8a18\u4e8b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u3093\u306b\u3061\u306f\uff01\u30d5\u30ea\u30fc\u30e9\u30f3\u30b9\u306e\u6843\u592a\u90ce\u3067\u3059\u3002 Java\u306eswitch\u6587\u3067String\u578b\u306e\u6587\u5b57\u5217\u3092\u4f7f\u3044\u305f\u3044\u5834\u9762\u304c\u5c11\u306a\u304b\u3089\u305a\u3042\u308a\u307e\u3059\u3002 \u305d\u306e\u3088\u3046\u306a\u3068\u304d\u3001\u3075\u3068\u4f7f\u3044\u65b9\u304c\u5408\u3063\u3066\u3044\u308b\u304b\u4e0d\u5b89\u306b\u611f\u3058\u305f\u3053\u3068\u306f\u306a\u3044\u3067\u3059\u304b\uff1f \u305d\u306e\u4e0d\u5b89\u3092\u89e3\u6c7a\u3059\u308b\u306e\u304c […]<\/p>\n","protected":false},"author":16433,"featured_media":79570,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[2344],"tags":[67],"class_list":["post-20241","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-study","tag-java"],"acf":[],"yoast_head":"\n\u3010Java\u3011switch\u6587\u3067String\u306e\u6587\u5b57\u5217\u3092\u6271\u3046\u65b9\u6cd5 | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c \u3010Java\u3011switch\u6587\u3067String\u306e\u6587\u5b57\u5217\u3092\u6271\u3046\u65b9\u6cd5 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\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0\" \/>\n<meta property=\"og:description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c \u3010Java\u3011switch\u6587\u3067String\u306e\u6587\u5b57\u5217\u3092\u6271\u3046\u65b9\u6cd5 \u300d\u306b\u3064\u3044\u3066\u3001\u8ab0\u3067\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u3042\u306a\u305f\u306e\u60a9\u307f\u304c\u89e3\u6c7a\u3059\u308b\u3060\u3051\u3058\u3083\u306a\u304f\u3001\u65b0\u305f\u306a\u6c17\u4ed8\u304d\u3082\u767a\u898b\u3067\u304d\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002\u304a\u60a9\u307f\u306e\u65b9\u306f\u305c\u3072\u3054\u4e00\u8aad\u304f\u3060\u3055\u3044\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sejuku.net\/blog\/20241\" \/>\n<meta property=\"og:site_name\" content=\"\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/sejuku2013\" \/>\n<meta property=\"article:published_time\" content=\"2017-07-18T19:29:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-06T02:41:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/03\/java_thumb.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"\u4f8d\u30c6\u30c3\u30af\u7de8\u96c6\u90e8\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@samuraijuku\" \/>\n<meta name=\"twitter:site\" content=\"@samuraijuku\" \/>\n<script type=\"application\/ld+json\" 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