{"id":634,"date":"2023-06-09T13:36:13","date_gmt":"2023-05-30T05:22:56","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e5%a4%9a%e9%87%8d%e7%b6%99%e6%89%bf-java-no-okeku-ta-jukei\/"},"modified":"2025-08-01T01:15:24","modified_gmt":"2025-07-31T16:15:24","slug":"java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e5%a4%9a%e9%87%8d%e7%b6%99%e6%89%bf-java-no-okeku-ta-jukei","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e5%a4%9a%e9%87%8d%e7%b6%99%e6%89%bf-java-no-okeku-ta-jukei\/","title":{"rendered":"Java\u306b\u304a\u3051\u308b\u591a\u91cd\u7d99\u627f (Java no okeku ta j\u016bkei)"},"content":{"rendered":"

\u4eca\u65e5\u306fJava\u306e\u591a\u91cd\u7d99\u627f\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u5c11\u3057\u524d\u306b\u3001Java\u3067\u306e\u7d99\u627f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u304a\u3088\u3073\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u3044\u304f\u3064\u304b\u306e\u6295\u7a3f\u3092\u66f8\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u6295\u7a3f\u3067\u306f\u3001Java\u306e\u591a\u91cd\u7d99\u627f\u3092\u898b\u3066\u304b\u3089\u3001\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3068\u7d99\u627f\u3092\u6bd4\u8f03\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

Java\u306b\u304a\u3051\u308b\u591a\u91cd\u7d99\u627f<\/h2>\n

Java\u3067\u306f\u3001\u8907\u6570\u306e\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3092\u6301\u3064\u5358\u4e00\u306e\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u304c\u30de\u30eb\u30c1\u30d7\u30eb\u7d99\u627f\u3067\u3059\u3002C++\u306a\u3069\u4ed6\u306e\u4eba\u6c17\u306e\u3042\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u306f\u7570\u306a\u308a\u3001Java\u3067\u306f\u30af\u30e9\u30b9\u306b\u304a\u3044\u3066\u30de\u30eb\u30c1\u30d7\u30eb\u7d99\u627f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u305b\u3093\u3002Java\u3067\u306f\u3001\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u30de\u30eb\u30c1\u30d7\u30eb\u7d99\u627f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u8907\u96d1\u306a\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306e\u65b9\u6cd5\u3092\u63d0\u4f9b\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u540c\u3058\u7d50\u679c\u3092\u5f97\u308b\u305f\u3081\u306e\u3088\u308a\u826f\u3044\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

Java\u306b\u304a\u3051\u308b\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u306e\u554f\u984c<\/h3>\n

\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u306e\u554f\u984c\u3092\u7c21\u5358\u306b\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001Java\u3067\u591a\u91cd\u7d99\u627f\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u308b\u3068\u4eee\u5b9a\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u305d\u306e\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30a4\u30e1\u30fc\u30b8\u306e\u3088\u3046\u306a\u30af\u30e9\u30b9\u968e\u5c64\u304c\u5b58\u5728\u3059\u308b\u3067\u3057\u3087\u3046\u3002\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306f\u62bd\u8c61\u30af\u30e9\u30b9\u3067\u3042\u308a\u3001\u3044\u304f\u3064\u304b\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3057\u3066\u3044\u307e\u3059\u3002\u30af\u30e9\u30b9A\u3068\u30af\u30e9\u30b9B\u306f\u5177\u8c61\u30af\u30e9\u30b9\u3067\u3059\u3002SuperClass.java\u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002<\/p>\n

package com.scdev.inheritance;\r\n\r\npublic abstract class SuperClass {\r\n\r\n\tpublic abstract void doSomething();\r\n}\r\n<\/code><\/pre>\n
\u30af\u30e9\u30b9A.java<\/p>\n
package com.scdev.inheritance;\r\n\r\npublic class ClassA extends SuperClass{\r\n\t\r\n\t@Override\r\n\tpublic void doSomething(){\r\n\t\tSystem.out.println(\"doSomething implementation of A\");\r\n\t}\r\n\t\r\n\t\/\/ClassA own method\r\n\tpublic void methodA(){\r\n\t\t\r\n\t}\r\n}\r\n<\/code><\/pre>\n
\u30af\u30e9\u30b9B.java<\/p>\n
package com.scdev.inheritance;\r\n\r\npublic class ClassB extends SuperClass{\r\n\r\n\t@Override\r\n\tpublic void doSomething(){\r\n\t\tSystem.out.println(\"doSomething implementation of B\");\r\n\t}\r\n\t\r\n\t\/\/ClassB specific method\r\n\tpublic void methodB(){\r\n\t\t\r\n\t}\r\n}\r\n<\/code><\/pre>\n
\u4eca\u3001ClassC\u306e\u5b9f\u88c5\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3042\u308a\u3001ClassA\u3068ClassB\u306e\u4e21\u65b9\u3092\u62e1\u5f35\u3057\u3066\u3044\u307e\u3059\u3002ClassC.java\u3068\u3044\u3046\u540d\u524d\u3067\u3059\u3002<\/p>\n
package com.scdev.inheritance;\r\n\r\n\/\/ this is just an assumption to explain the diamond problem\r\n\/\/this code won't compile\r\npublic class ClassC extends ClassA, ClassB{\r\n\r\n\tpublic void test(){\r\n\t\t\/\/calling super class method\r\n\t\tdoSomething();\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n
test()\u30e1\u30bd\u30c3\u30c9\u304c\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306edoSomething()\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306f\u3069\u306e\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u304b\u308f\u304b\u3089\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u5f62\u306e\u30af\u30e9\u30b9\u56f3\u306e\u305f\u3081\u3001\u3053\u308c\u306fJava\u306b\u304a\u3051\u308b\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u554f\u984c\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002Java\u306b\u304a\u3051\u308b\u30c0\u30a4\u30e4\u30e2\u30f3\u30c9\u554f\u984c\u306f\u3001\u30af\u30e9\u30b9\u306b\u304a\u3051\u308b\u591a\u91cd\u7d99\u627f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u4e3b\u306a\u7406\u7531\u3067\u3059\u3002\u4e0a\u8a18\u306e\u591a\u91cd\u30af\u30e9\u30b9\u306e\u7d99\u627f\u306b\u95a2\u3059\u308b\u554f\u984c\u306f\u3001\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u5171\u901a\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u30643\u3064\u306e\u30af\u30e9\u30b9\u3067\u3082\u767a\u751f\u3059\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
Java\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306b\u304a\u3051\u308b\u591a\u91cd\u7d99\u627f<\/h2>\n
\u30af\u30e9\u30b9\u3067\u306f\u591a\u91cd\u7d99\u627f\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u306b\u6c17\u3065\u3044\u305f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u306f\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5358\u4e00\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u62e1\u5f35\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u7c21\u5358\u306a\u4f8b\u3067\u3059\u3002InterfaceA.java<\/p>\n
package com.scdev.inheritance;\r\n\r\npublic interface InterfaceA {\r\n\r\n\tpublic void doSomething();\r\n}\r\n<\/code><\/pre>\n
InterfaceB.java\u306e\u5185\u5bb9\u3092\u65e5\u672c\u8a9e\u3067\u30d1\u30e9\u30d5\u30ec\u30fc\u30ba\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059 :<\/p>\n
InterfaceB.java\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9B\u306eJava\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002<\/p>\n
package com.scdev.inheritance;\r\n\r\npublic interface InterfaceB {\r\n\r\n\tpublic void doSomething();\r\n}\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\u4e21\u65b9\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u3092\u5ba3\u8a00\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4eca\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3053\u308c\u3089\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u4e21\u65b9\u3092\u62e1\u5f35\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002InterfaceC.java<\/p>\n
package com.scdev.inheritance;\r\n\r\npublic interface InterfaceC extends InterfaceA, InterfaceB {\r\n\r\n\t\/\/same method is declared in InterfaceA and InterfaceB both\r\n\tpublic void doSomething();\r\n\t\r\n}\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u306f\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u306a\u65e5\u672c\u8a9e\u3067\u306e\u4e00\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u3059\uff1a<\/p>\n
\u3053\u308c\u306f\u5b8c\u74a7\u306b\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306f\u30e1\u30bd\u30c3\u30c9\u306e\u5ba3\u8a00\u306e\u307f\u3092\u884c\u3044\u3001\u5b9f\u969b\u306e\u5b9f\u88c5\u306f\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u5177\u4f53\u7684\u306a\u30af\u30e9\u30b9\u306b\u3088\u3063\u3066\u884c\u308f\u308c\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001Java\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3067\u306f\u8907\u6570\u306e\u7d99\u627f\u306b\u304a\u3044\u3066\u3042\u3089\u3086\u308b\u66d6\u6627\u3055\u306e\u53ef\u80fd\u6027\u304c\u306a\u3044\u306e\u3067\u3059\u3002\u305d\u308c\u3086\u3048\u3001Java\u306e\u30af\u30e9\u30b9\u306f\u8907\u6570\u306e\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u4f8b\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002InterfacesImpl.java<\/p>\n
package com.scdev.inheritance;\r\n\r\npublic class InterfacesImpl implements InterfaceA, InterfaceB, InterfaceC {\r\n\r\n\t@Override\r\n\tpublic void doSomething() {\r\n\t\tSystem.out.println(\"doSomething implementation of concrete class\");\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tInterfaceA objA = new InterfacesImpl();\r\n\t\tInterfaceB objB = new InterfacesImpl();\r\n\t\tInterfaceC objC = new InterfacesImpl();\r\n\t\t\r\n\t\t\/\/all the method calls below are going to same concrete implementation\r\n\t\tobjA.doSomething();\r\n\t\tobjB.doSomething();\r\n\t\tobjC.doSomething();\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n
\u79c1\u304c\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u305f\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306b\u3001\u6bce\u56de@Override\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6c17\u3065\u304d\u307e\u3057\u305f\u304b\u3002Override\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306f\u30013\u3064\u306e\u7d44\u307f\u8fbc\u307fJava\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u3046\u3061\u306e1\u3064\u3067\u3042\u308a\u3001\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u969b\u306b\u306f\u5e38\u306bOverride\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u3079\u304d\u3067\u3059\u3002<\/p>\n
\u6551\u52a9\u306e\u305f\u3081\u306e\u4f5c\u66f2 (Ky\u016bjo no tame no sakkyoku)<\/h3>\n
\u30af\u30e9\u30b9C\u3067ClassA\u306efunction methodA()\u3068ClassB\u306efunction methodB()\u3092\u5229\u7528\u3057\u305f\u3044\u5834\u5408\u3001\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u89e3\u6c7a\u7b56\u304c\u898b\u3064\u304b\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u4e21\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u3001\u3055\u3089\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u304b\u3089doSomething()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u5229\u7528\u3057\u305f\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u3055\u308c\u305fClassC\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u3059\u3002ClassC.java<\/p>\n
package com.scdev.inheritance;\r\n\r\npublic class ClassC{\r\n\r\n\tClassA objA = new ClassA();\r\n\tClassB objB = new ClassB();\r\n\t\r\n\tpublic void test(){\r\n\t\tobjA.doSomething();\r\n\t}\r\n\t\r\n\tpublic void methodA(){\r\n\t\tobjA.methodA();\r\n\t}\r\n\t\r\n\tpublic void methodB(){\r\n\t\tobjB.methodB();\r\n\t}\r\n}\r\n<\/code><\/pre>\n
\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3068\u7d99\u627f\u306e\u6bd4\u8f03<\/h3>\n
Java\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306e\u4e00\u3064\u306f\u300c\u7d99\u627f\u3088\u308a\u3082\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u512a\u5148\u3059\u308b\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u512a\u5148\u3059\u308b\u8981\u7d20\u306e\u3044\u304f\u3064\u304b\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
    \n
  1. \n
      \u6b21\u306e\u3088\u3046\u306b\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3068\u30b5\u30d6\u30af\u30e9\u30b9\u304c\u3042\u308b\u3068\u4eee\u5b9a\u3057\u307e\u3057\u3087\u3046\u3002ClassC.java<\/ol>\n<\/li>\n<\/ol>\n
       <\/p>\n
        \n
      1. \n
          package com.scdev.inheritance;<\/ol>\n<\/li>\n<\/ol>\n
          public class ClassC{<\/p>\n
          public void methodC(){
          \n}
          \n}<\/p>\n
          ClassD.java
          \npackage com.scdev.inheritance;<\/p>\n
          public class ClassD extends ClassC{<\/p>\n
          public int test(){
          \nreturn 0;
          \n}
          \n}<\/p>\n
          \u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001ClassC\u306e\u5b9f\u88c5\u304c\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5909\u66f4\u3055\u308c\u305f\u5834\u5408\u306b\u306f\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002ClassC.java
          \npackage com.scdev.inheritance;<\/p>\n
          public class ClassC{<\/p>\n
          public void methodC(){
          \n}<\/p>\n
          public void test(){
          \n}
          \n}<\/p>\n
          \u6ce8\u610f\u70b9\u3068\u3057\u3066\u306f\u3001test()\u30e1\u30bd\u30c3\u30c9\u306f\u3059\u3067\u306b\u30b5\u30d6\u30af\u30e9\u30b9\u306b\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u623b\u308a\u5024\u306e\u578b\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001ClassD\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u306a\u304f\u306a\u308a\u3001IDE\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u307e\u305f\u306f\u30b5\u30d6\u30af\u30e9\u30b9\u306e\u623b\u308a\u5024\u306e\u578b\u3092\u5909\u66f4\u3059\u308b\u3088\u3046\u63d0\u6848\u3055\u308c\u308b\u3067\u3057\u3087\u3046\u3002\u305d\u308c\u3067\u306f\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u304c\u5236\u5fa1\u3067\u304d\u306a\u3044\u591a\u6bb5\u968e\u306e\u30af\u30e9\u30b9\u7d99\u627f\u3068\u3044\u3046\u72b6\u6cc1\u3092\u60f3\u50cf\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u79c1\u305f\u3061\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3092\u89e3\u6d88\u3059\u308b\u305f\u3081\u306b\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u306e\u30b7\u30b0\u30cd\u30c1\u30e3\u3084\u540d\u524d\u3092\u5909\u66f4\u305b\u3056\u308b\u3092\u5f97\u306a\u3044\u72b6\u6cc1\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u30b5\u30d6\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u3059\u3079\u3066\u306e\u5834\u6240\u3067\u5909\u66f4\u3092\u52a0\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u7d99\u627f\u306f\u79c1\u305f\u3061\u306e\u30b3\u30fc\u30c9\u3092\u58ca\u308c\u3084\u3059\u304f\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3067\u306f\u3053\u306e\u3088\u3046\u306a\u554f\u984c\u306f\u767a\u751f\u305b\u305a\u3001\u305d\u308c\u304c\u7d99\u627f\u3088\u308a\u3082\u597d\u307e\u3057\u3044\u3068\u3055\u308c\u308b\u7406\u7531\u3067\u3059\u3002<\/p>\n
          \u7d99\u627f\u306e\u5225\u306e\u554f\u984c\u306f\u3001\u3059\u3079\u3066\u306e\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u516c\u958b\u3057\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002\u3082\u3057\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u304c\u9069\u5207\u306b\u8a2d\u8a08\u3055\u308c\u3066\u304a\u3089\u305a\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30db\u30fc\u30eb\u304c\u3042\u308b\u5834\u5408\u3001\u79c1\u305f\u3061\u304c\u30af\u30e9\u30b9\u3092\u5b8c\u5168\u306b\u5b9f\u88c5\u306b\u6c17\u3092\u3064\u3051\u3066\u3044\u3066\u3082\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u4e0d\u6b63\u306a\u5b9f\u88c5\u306e\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u306f\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u5236\u5fa1\u3055\u308c\u305f\u30a2\u30af\u30bb\u30b9\u3092\u63d0\u4f9b\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001\u7d99\u627f\u306f\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u306b\u5236\u5fa1\u3092\u6301\u305f\u306a\u3044\u305f\u3081\u3001\u3053\u308c\u3082\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u304c\u7d99\u627f\u306b\u5bfe\u3057\u3066\u512a\u308c\u3066\u3044\u308b\u4e3b\u306a\u5229\u70b9\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n
          \u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u306e\u3082\u3046\u4e00\u3064\u306e\u5229\u70b9\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u306b\u304a\u3044\u3066\u67d4\u8edf\u6027\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4e0a\u8a18\u306eClassC\u306e\u5b9f\u88c5\u306f\u6700\u9069\u3067\u306f\u306a\u304f\u3001\u5b9f\u884c\u6642\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u30e1\u30bd\u30c3\u30c9\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u6700\u5c0f\u9650\u306e\u5909\u66f4\u3067\u30e1\u30bd\u30c3\u30c9\u306e\u547c\u3073\u51fa\u3057\u3092\u67d4\u8edf\u306b\u3057\u3001\u52d5\u7684\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002ClassC.java
          \npackage com.scdev.inheritance;<\/p>\n
          public class ClassC{<\/p>\n
          SuperClass obj = null;<\/p>\n
          public ClassC(SuperClass o){
          \nthis.obj = o;
          \n}
          \npublic void test(){
          \nobj.doSomething();
          \n}<\/p>\n
          public static void main(String args[]){
          \nClassC obj1 = new ClassC(new ClassA());
          \nClassC obj2 = new ClassC(new ClassB());<\/p>\n
          obj1.test();
          \nobj2.test();
          \n}
          \n}<\/p>\n
          \u4e0a\u8a18\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u51fa\u529b\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a
          \nA\u306edoSomething\u306e\u5b9f\u88c5
          \nB\u306edoSomething\u306e\u5b9f\u88c5<\/p>\n
          \u3053\u306e\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306e\u67d4\u8edf\u6027\u306f\u7d99\u627f\u3067\u306f\u5229\u7528\u3067\u304d\u305a\u3001\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u597d\u3080\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u4fc3\u9032\u3057\u307e\u3059\u3002<\/p>\n
          \u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3067\u306f\u3001\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\u304c\u7c21\u5358\u3067\u3059\u3002\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u304b\u3089\u4f7f\u7528\u3057\u3066\u3044\u308b\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u628a\u63e1\u3057\u3001\u30c6\u30b9\u30c8\u306e\u305f\u3081\u306b\u305d\u308c\u3092\u30e2\u30c3\u30af\u30a2\u30c3\u30d7\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u7d99\u627f\u3067\u306f\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3057\u3066\u304a\u308a\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u4f7f\u7528\u3055\u308c\u308b\u304b\u3069\u3046\u304b\u308f\u304b\u3089\u306a\u3044\u305f\u3081\u3001\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u306e\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30c6\u30b9\u30c8\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u4f59\u5206\u306a\u4f5c\u696d\u3067\u3042\u308a\u3001\u7d99\u627f\u306e\u305f\u3081\u306b\u4e0d\u5fc5\u8981\u306a\u4f5c\u696d\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
          \u305d\u308c\u304c\u3059\u3079\u3066Java\u306b\u304a\u3051\u308b\u591a\u91cd\u7d99\u627f\u3068\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u306e\u7c21\u5358\u306a\u8aac\u660e\u3067\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          \u4eca\u65e5\u306fJava\u306e\u591a\u91cd\u7d99\u627f\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u5c11\u3057\u524d\u306b\u3001Java\u3067\u306e\u7d99\u627f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3001\u304a\u3088\u3073\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u306b\u3064\u3044\u3066\u3044\u304f\u3064\u304b\u306e\u6295\u7a3f\u3092\u66f8\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u6295\u7a3f\u3067\u306f\u3001Java\u306e\u591a\u91cd\u7d99\u627f\u3092\u898b\u3066\u304b\u3089\u3001\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3068\u7d99\u627f\u3092\u6bd4 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-634","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\nJava\u306b\u304a\u3051\u308b\u591a\u91cd\u7d99\u627f (Java no okeku ta j\u016bkei) - 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