{"id":212,"date":"2024-08-08T10:39:08","date_gmt":"2024-08-08T01:39:08","guid":{"rendered":"https:\/\/techfun.cc\/?p=212"},"modified":"2025-03-07T13:42:06","modified_gmt":"2025-03-07T04:42:06","slug":"java_base_java_other_functions","status":"publish","type":"post","link":"https:\/\/techfun.cc\/java-base\/java_base_java_other_functions.html","title":{"rendered":"Java12\u304b\u3089Java17\u307e\u3067\u306b\u5c0e\u5165\u3055\u308c\u305f\u6a5f\u80fd\u306e\u7d39\u4ecb"},"content":{"rendered":"

1.<\/span>\u672c\u7ae0\u3067\u306e\u5b66\u7fd2\u9805\u76ee<\/h3>\n

\u672c\u8b1b\u5ea7\u3067\u306f\u3001\u4e3b\u306b\u73fe\u5834\u3067\u591a\u304f\u6271\u308f\u308c\u308b\u3001Java11\u307e\u3067\u306e\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u5b66\u7fd2\u3092\u3057\u3066\u3044\u307e\u3059\u304c\u3001Java12\u4ee5\u964d\u306b\u3082\u4fbf\u5229\u306a\u6a5f\u80fd\u7fa4\u304c\u5c0e\u5165\u3055\u308c\u3066\u304d\u3066\u3044\u307e\u3059\u3002
\n\u305d\u306e\u305f\u3081\u3001\u672c\u7ae0\u3067\u306fJava12\u304b\u3089Java17\u307e\u3067\u306b\u5c0e\u5165\u3055\u308c\u305f\u65b0\u6a5f\u80fd\u306e\u5185\u3001\u7279\u306b\u5f79\u7acb\u3061\u305d\u3046\u306a\u6a5f\u80fd\u306b\u7d5e\u3063\u3066\u57fa\u672c\u7684\u306a\u5185\u5bb9\u3084\u4f7f\u3044\u65b9\u3092\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\n
<\/div>\n<\/div>\n

2.<\/span>\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af<\/h3>\n

Java15\u3067\u8ffd\u52a0\u3055\u308c\u305f\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n

2.1.<\/span>\u8907\u6570\u884c\u306b\u307e\u305f\u304c\u308b\u6587\u5b57\u5217\u306e\u5ba3\u8a00<\/h4>\n

\u307e\u305a\u3001\u6587\u5b57\u5217\u306e\u5ba3\u8a00\u306b\u3064\u3044\u3066\u5fa9\u7fd2\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

MyString1.java<\/div>\n
public class MyString1 {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\/\/ \u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u306a\u3044\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u3092\u5ba3\u8a00\r\n\t\tString str = \"\u308a\u3093\u3054\\r\\n\"\r\n\t\t+ \"\u3082\u3082\\r\\n\"\r\n\t\t+ \"\u307f\u304b\u3093\";\r\n\r\n\t\tSystem.out.println(str);\r\n\t}\r\n\r\n}<\/code><\/pre>\n
\u8907\u6570\u884c\u306b\u307e\u305f\u304c\u308b\u6587\u5b57\u5217\u3092\u5ba3\u8a00\u3059\u308b\u5834\u5408\u3001\u6587\u5b57\u5217\u3068\u6b21\u306e\u884c\u306e\u6587\u5b57\u5217\u3068\u306e\u9593\u306b\u6539\u884c\u6587\u5b57(\\r\\n)\u3092\u4ed8\u4e0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\n\u307e\u305f\u3001\uff11\u884c\u5358\u4f4d\u3067\u6587\u5b57\u5217\u3092\u5ba3\u8a00\u3057\u306a\u304c\u3089\u66f8\u3044\u3066\u3044\u304f\u306b\u306f\u3001+\u6f14\u7b97\u5b50\u3092\u7528\u3044\u3066\u6587\u5b57\u5217\u3068\u6587\u5b57\u5217\u3092\u9023\u7d50\u3057\u307e\u3059\u3002<\/p>\n
\u5b9f\u884c\u7d50\u679c<\/div>\n
\u308a\u3093\u3054\r\n\u3082\u3082\r\n\u307f\u304b\u3093<\/code><\/pre>\n
2.2.<\/span>\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u7528\u3044\u305f\u6587\u5b57\u5217\u306e\u5ba3\u8a00<\/h4>\n
\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u6539\u884c\u6587\u5b57\u3084\u6587\u5b57\u5217\u9023\u7d50\u306e\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u305b\u305a\u3001\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u3092Java\u306e\u30b3\u30fc\u30c9\u5185\u306b\u76f4\u63a5\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
\n\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001"""\u3092\u56f2\u3080\u3088\u3046\u306b\u3057\u3066\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u3092\u5ba3\u8a00\u3057\u307e\u3059\u3002<\/p>\n
MyString2.java<\/div>\n
public class MyString2 {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\/\/ \u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u3092\u5ba3\u8a00\r\n\t\tString str = \"\"\"\r\n\u308a\u3093\u3054\r\n\u3082\u3082\r\n\u307f\u304b\u3093\"\"\";\r\n\t\tSystem.out.println(str);\r\n\t}\r\n\r\n}<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/div>\n
\u308a\u3093\u3054\r\n\u3082\u3082\r\n\u307f\u304b\u3093<\/code><\/pre>\n
\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306e\u4e2d\u306b\u5165\u529b\u3057\u305f\u7a7a\u767d\u6587\u5b57\u306f\u3001\u305d\u306e\u307e\u307e\u7a7a\u767d\u6587\u5b57\u3068\u3057\u3066\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001\u30a4\u30f3\u30c7\u30f3\u30c8\u4ed8\u304d\u306eHTML\u6587\u5b57\u5217\u3092\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u7528\u3044\u3066\u66f8\u3044\u305f\u30b3\u30fc\u30c9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
MyString3.java<\/div>\n
public class MyString3 {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\/\/ \u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3057\u305f\u8907\u6570\u884c\u306e\u6587\u5b57\u5217\u3092\u5ba3\u8a00\r\n\t\tString str = \"\"\"\r\n<html>\r\n\t<head>\r\n\t\t<title>\u3053\u3093\u306b\u3061\u306f<\/title>\r\n\t<\/head>\r\n\t<body>\r\n\t\t<h1>\u3053\u3093\u306b\u3061\u306f\uff01\uff01<\/h1>\r\n\t<\/body>\r\n<\/html>\"\"\";\r\n\t\tSystem.out.println(str);\r\n\t}\r\n\r\n}<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/div>\n
<html>\r\n\t<head>\r\n\t\t<title>\u3053\u3093\u306b\u3061\u306f<\/title>\r\n\t<\/head>\r\n\t<body>\r\n\t\t<h1>\u3053\u3093\u306b\u3061\u306f\uff01\uff01<\/h1>\r\n\t<\/body>\r\n<\/html><\/code><\/pre>\n
\u3053\u306e\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u3046\u307e\u304f\u6d3b\u7528\u3059\u308b\u3068\u3001HTML\u3084SQL\u3092\u306f\u3058\u3081\u3068\u3059\u308b\u8907\u6570\u884c\u306e\u30c6\u30ad\u30b9\u30c8\u6587\u5b57\u5217\u3067\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u5916\u90e8\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u5225\u9014\u7528\u610f\u305b\u305a\u306b\u3001Java\u306e\u30b3\u30fc\u30c9\u5185\u306b\u76f4\u63a5\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30d5\u30a1\u30a4\u30eb\u6570\u3092\u6e1b\u3089\u3059\u52b9\u679c\u3082\u5f97\u3089\u308c\u307e\u3059\u3002
\n\u203bHTML\u3084SQL\u306b\u3064\u3044\u3066\u306f\u3001\u5225\u8b1b\u5ea7\u306b\u3066\u5b66\u7fd2\u3057\u307e\u3059\u3002\u73fe\u72b6\u306f\u305d\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u3001\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u3046\u3068\u4fbf\u5229\u306b\u306a\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u8a8d\u8b58\u3067\u304d\u308c\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093<\/p>\n
\u30c6\u30ad\u30b9\u30c8\u30d6\u30ed\u30c3\u30af\u306b\u3064\u3044\u3066\u306e\u8aac\u660e\u306f\u3001\u4ee5\u4e0a\u3067\u3059\u3002<\/p>\n
\n
<\/div>\n<\/div>\n
3.<\/span>switch\uff5ecase\u306e\u8907\u6570\u30e9\u30d9\u30eb<\/h3>\n
Java14\u3067\u8ffd\u52a0\u3055\u308c\u305f\u3001switch\uff5ecase\u306e\u8907\u6570\u30e9\u30d9\u30eb\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
3.1.<\/span>case\u6761\u4ef6\u306e\u8907\u6570\u6307\u5b9a<\/h4>\n
\u307e\u305a\u306f\u3001switch\u6587\u306e\u4f7f\u3044\u65b9\u3092\u5fa9\u7fd2\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
SwitchCase1.java<\/div>\n
public class SwitchCase1 {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tint number = 3;\r\n\t\tswitch (number) {\r\n\t\t\tcase 1:\r\n\t\t\tcase 2:\r\n\t\t\t\tSystem.out.println(\"\u756a\u53f7 = 1, 2\");\r\n\t\t\t\tbreak;\r\n\t\t\tcase 3:\r\n\t\t\tcase 4:\r\n\t\t\tcase 5:\r\n\t\t\t\tSystem.out.println(\"\u756a\u53f7 = 3, 4, 5\");\r\n\t\t\t\tbreak;\r\n\t\t\tdefault:\r\n\t\t\t\tSystem.out.println(\"\u756a\u53f7 = \" + number);\r\n\t\t\t\tbreak;\r\n\t\t}\r\n\t}\r\n\r\n}<\/code><\/pre>\n
switch\u306b\u6307\u5b9a\u3057\u305f\u5909\u6570(number)\u306b\u5bfe\u5fdc\u3059\u308bcase\u306b\u306f\u3001\u5e38\u306b1\u500b\u306e\u5024\u3057\u304b\u6307\u5b9a\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002
\n\u305d\u306e\u305f\u3081\u3001\u4e00\u5ea6\u306b\u8907\u6570\u306ecase\u6761\u4ef6\u5024\u3067\u540c\u3058\u51e6\u7406\u3092\u5b9f\u884c\u3057\u305f\u3044\u5834\u5408\u3001\u305d\u306e\u6761\u4ef6\u306e\u500b\u6570\u5206\u3060\u3051case\u3092\u66f8\u304b\u306a\u3044\u3068\u3044\u3051\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n
switch\u306e\u8907\u6570\u30e9\u30d9\u30eb\u306e\u6a5f\u80fd\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30ab\u30f3\u30de\u3067\u533a\u5207\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u30011\u500b\u306ecase\u306e\u4e2d\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30b3\u30fc\u30c9\u306e\u884c\u6570\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
SwitchCase2.java<\/div>\n
public class SwitchCase2 {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tint number = 3;\r\n\r\n\t\tswitch (number) {\r\n\t\t\tcase 1, 2:\r\n\t\t\t\tSystem.out.println(\"\u756a\u53f7 = 1, 2\");\r\n\t\t\t\tbreak;\r\n\t\t\tcase 3, 4, 5:\r\n\t\t\t\tSystem.out.println(\"\u756a\u53f7 = 3, 4, 5\");\r\n\t\t\t\tbreak;\r\n\t\t\tdefault:\r\n\t\t\t\tSystem.out.println(\"\u756a\u53f7 = \" + number);\r\n\t\t\t\tbreak;\r\n\t\t}\r\n\t}\r\n\r\n}<\/code><\/pre>\n
switch\uff5ecase\u306e\u8907\u6570\u30e9\u30d9\u30eb\u306b\u3064\u3044\u3066\u306e\u8aac\u660e\u306f\u3001\u4ee5\u4e0a\u3067\u3059\u3002<\/p>\n
\n
<\/div>\n<\/div>\n
4.<\/span>\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\uff08Record\uff09<\/h3>\n
Java16\u3067\u8ffd\u52a0\u3055\u308c\u305f\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n
4.1.<\/span>JavaBeans\u306e\u30c7\u30fc\u30bf\u69cb\u9020<\/h4>\n
\u307e\u305a\u306f\u3001JavaBeans\u306e\u4f7f\u3044\u65b9\u3092\u5fa9\u7fd2\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u6700\u521d\u306b\u3001JavaBeans\u306e\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
SampleBean1.java<\/div>\n
public class SampleBean1 {\r\n\r\n\t\/\/ \u540d\u524d\r\n\tprivate String name;\r\n\r\n\t\/\/ \u30d5\u30ea\u30ac\u30ca\r\n\tprivate String furigana;\r\n\r\n\t\/\/ \u5e74\u9f62\r\n\tprivate int age;\r\n\r\n\tpublic String getName() {\r\n\t\treturn name;\r\n\t}\r\n\r\n\tpublic void setName(String name) {\r\n\t\tthis.name = name;\r\n\t}\r\n\r\n\tpublic String getFurigana() {\r\n\t\treturn furigana;\r\n\t}\r\n\r\n\tpublic void setFurigana(String furigana) {\r\n\t\tthis.furigana = furigana;\r\n\t}\r\n\r\n\tpublic int getAge() {\r\n\t\treturn age;\r\n\t}\r\n\r\n\tpublic void setAge(int age) {\r\n\t\tthis.age = age;\r\n\t}\r\n\r\n}<\/code><\/pre>\n
\u6b21\u306b\u3001\u5b9f\u884c\u7528\u306e\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
ShowSampleBean1.java<\/div>\n
public class ShowSampleBean1 {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tSampleBean1 bean1 = new SampleBean1();\r\n\t\tbean1.setName(\"\u4f50\u85e4\");\r\n\t\tbean1.setFurigana(\"\u30b5\u30c8\u30a6\");\r\n\t\tbean1.setAge(20);\r\n\r\n\t\tSampleBean1 bean2 = new SampleBean1();\r\n\t\tbean2.setName(\"\u9234\u6728\");\r\n\t\tbean2.setFurigana(\"\u30b9\u30ba\u30ad\");\r\n\t\tbean2.setAge(30);\r\n\r\n\t\tSystem.out.println(\"\u6700\u521d\u306b\u8ffd\u52a0\u3055\u308c\u305f\u540d\u524d\u306f\u3001\" + bean1.getName() + \"\u3055\u3093\u3067\u3059\u3002\");\r\n\t\tSystem.out.println(\"2\u756a\u76ee\u306b\u8ffd\u52a0\u3055\u308c\u305f\u540d\u524d\u306f\u3001\" + bean2.getName() + \"\u3055\u3093\u3067\u3059\u3002\");\r\n\t}\r\n\r\n}<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/div>\n
\u6700\u521d\u306b\u8ffd\u52a0\u3055\u308c\u305f\u540d\u524d\u306f\u3001\u4f50\u85e4\u3055\u3093\u3067\u3059\u3002\r\n2\u756a\u76ee\u306b\u8ffd\u52a0\u3055\u308c\u305f\u540d\u524d\u306f\u3001\u9234\u6728\u3055\u3093\u3067\u3059\u3002<\/code><\/pre>\n
4.2.<\/span>\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u3068\u305d\u306e\u5b9a\u7fa9\u65b9\u6cd5<\/h4>\n
\u5f93\u6765\u306eJavaBeans\u3067\u306f\u3001\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5b9a\u7fa9\u306b\u52a0\u3048\u3001\u300cgetter\u300d\u3068\u300csetter\u300d\u306e\u30a2\u30af\u30bb\u30b9\u30e1\u30bd\u30c3\u30c9\u306e\u30b3\u30fc\u30c9\u3092\u3001\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u6570\u5206\u3060\u3051\u66f8\u304b\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u8ab2\u984c\u304c\u3042\u308a\u307e\u3057\u305f\u3002
\n\u305d\u308c\u3092\u89e3\u6c7a\u3059\u308b\u65b0\u6a5f\u80fd\u3068\u3057\u3066\u767b\u5834\u3057\u305f\u306e\u304c\u3001\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\uff08Record\uff09\u3067\u3059\u3002
\n\u3053\u306e\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u3092\u4f7f\u3046\u3068\u3001JavaBeans\u3088\u308a\u3082\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u7c21\u5358\u306b\u5b9a\u7fa9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
SampleBean2.java<\/div>\n
\/**\r\n * SampleBean2\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u3002\r\n *\r\n * @param name \u540d\u524d\u3002\r\n * @param furigana \u30d5\u30ea\u30ac\u30ca\u3002\r\n * @param age \u5e74\u9f62\u3002\r\n *\/\r\npublic record SampleBean2(String name, String furigana, int age) {\r\n}<\/code><\/pre>\n
\u30ec\u30b3\u30fc\u30c9\u30af\u30e9\u30b9\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u306b\u306f\u3001\u4e0b\u8a18\u306e\u901a\u308a\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n