{"id":875,"date":"2022-10-09T23:29:32","date_gmt":"2022-12-27T01:48:39","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%e3%82%a2%e3%83%80%e3%83%97%e3%82%bf%e3%83%bc%e3%83%87%e3%82%b6%e3%82%a4%e3%83%b3%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3%e3%80%82\/"},"modified":"2025-08-01T03:11:42","modified_gmt":"2025-07-31T18:11:42","slug":"java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%82%a2%e3%83%80%e3%83%97%e3%82%bf%e3%83%bc%e3%83%87%e3%82%b6%e3%82%a4%e3%83%b3%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8b%e3%82%a2%e3%83%80%e3%83%97%e3%82%bf%e3%83%bc%e3%83%87%e3%82%b6%e3%82%a4%e3%83%b3%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3%e3%80%82\/","title":{"rendered":"Java\u306b\u304a\u3051\u308b\u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3002"},"content":{"rendered":"

\u30a2\u30c0\u30d7\u30bf\u30fc\u30fb\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u69cb\u9020\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\u3042\u308a\u3001\u7121\u95a2\u4fc2\u306a\u4e8c\u3064\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u9023\u643a\u3055\u305b\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u7121\u95a2\u4fc2\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7d50\u3076\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30a2\u30c0\u30d7\u30bf\u30fc\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n

\u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3<\/h2>\n

\u30a2\u30c0\u30d7\u30bf\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u7d20\u6674\u3089\u3057\u3044\u73fe\u5b9f\u306e\u4f8b\u306e\u4e00\u3064\u306f\u3001\u30e2\u30d0\u30a4\u30eb\u30c1\u30e3\u30fc\u30b8\u30e3\u30fc\u3067\u3059\u3002\u30e2\u30d0\u30a4\u30eb\u30d0\u30c3\u30c6\u30ea\u30fc\u306f3\u30dc\u30eb\u30c8\u306e\u5145\u96fb\u3092\u5fc5\u8981\u3068\u3057\u307e\u3059\u304c\u3001\u901a\u5e38\u306e\u30b3\u30f3\u30bb\u30f3\u30c8\u306f\u30a2\u30e1\u30ea\u30ab\u3067\u306f120V\u3001\u30a4\u30f3\u30c9\u3067\u306f240V\u3092\u751f\u307f\u51fa\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30e2\u30d0\u30a4\u30eb\u30c1\u30e3\u30fc\u30b8\u30e3\u30fc\u306f\u30e2\u30d0\u30a4\u30eb\u306e\u5145\u96fb\u30bd\u30b1\u30c3\u30c8\u3068\u58c1\u30b3\u30f3\u30bb\u30f3\u30c8\u306e\u9593\u3067\u30a2\u30c0\u30d7\u30bf\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u30a2\u30c0\u30d7\u30bf\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u3066\u30de\u30eb\u30c1\u30a2\u30c0\u30d7\u30bf\u3092\u5b9f\u88c5\u3057\u3088\u3046\u3068\u3057\u307e\u3059\u3002\u307e\u305a\u3001\u30dc\u30eb\u30c8\uff08\u30dc\u30eb\u30c8\u3092\u8a08\u6e2c\u3059\u308b\u305f\u3081\u306e\u30af\u30e9\u30b9\uff09\u3068\u30bd\u30b1\u30c3\u30c8\uff08120V\u306e\u4e00\u5b9a\u306e\u30dc\u30eb\u30c8\u3092\u751f\u6210\u3059\u308b\u30af\u30e9\u30b9\uff09\u306e2\u3064\u306e\u30af\u30e9\u30b9\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n

package com.scdev.design.adapter;\r\n\r\npublic class Volt {\r\n\r\n\tprivate int volts;\r\n\t\r\n\tpublic Volt(int v){\r\n\t\tthis.volts=v;\r\n\t}\r\n\r\n\tpublic int getVolts() {\r\n\t\treturn volts;\r\n\t}\r\n\r\n\tpublic void setVolts(int volts) {\r\n\t\tthis.volts = volts;\r\n\t}\r\n\t\r\n}\r\n<\/code><\/pre>\n
package com.scdev.design.adapter;\r\n\r\npublic class Socket {\r\n\r\n\tpublic Volt getVolt(){\r\n\t\treturn new Volt(120);\r\n\t}\r\n}\r\n<\/code><\/pre>\n
\u4eca\u30013\u30dc\u30eb\u30c8\u300112\u30dc\u30eb\u30c8\u3001\u305d\u3057\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u306e120\u30dc\u30eb\u30c8\u3092\u51fa\u529b\u3067\u304d\u308b\u30a2\u30c0\u30d7\u30bf\u30fc\u3092\u4f5c\u308a\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u3001\u307e\u305a\u3053\u308c\u3089\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064\u30a2\u30c0\u30d7\u30bf\u30fc\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
package com.scdev.design.adapter;\r\n\r\npublic interface SocketAdapter {\r\n\r\n\tpublic Volt get120Volt();\r\n\t\t\r\n\tpublic Volt get12Volt();\r\n\t\r\n\tpublic Volt get3Volt();\r\n}\r\n<\/code><\/pre>\n
2\u901a\u308a\u306e\u30a2\u30c0\u30d7\u30bf\u30fc\u30d1\u30bf\u30fc\u30f3<\/h3>\n
Adapter\u30d1\u30bf\u30fc\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u969b\u306b\u306f\u3001\u30af\u30e9\u30b9\u30a2\u30c0\u30d7\u30bf\u30fc\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30a2\u30c0\u30d7\u30bf\u30fc\u306e2\u3064\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u3069\u3061\u3089\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3082\u540c\u3058\u7d50\u679c\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n
    \n
  1. \n
      \u30af\u30e9\u30b9\u30a2\u30c0\u30d7\u30bf\u30fc – \u3053\u306e\u5f62\u5f0f\u306f\u3001Java\u306e\u7d99\u627f\u3092\u4f7f\u7528\u3057\u3001\u30bd\u30fc\u30b9\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff08\u3053\u306e\u5834\u5408\u306fSocket\u30af\u30e9\u30b9\uff09\u3092\u62e1\u5f35\u3057\u307e\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n
       <\/p>\n
        \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30a2\u30c0\u30d7\u30bf\u30fc – \u3053\u306e\u5f62\u5f0f\u306f\u3001Java\u306e\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3001\u30a2\u30c0\u30d7\u30bf\u30fc\u306f\u30bd\u30fc\u30b9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002<\/ol>\n
        \u30a2\u30c0\u30d7\u30bf\u30fc \u30c7\u30b6\u30a4\u30f3 \u30d1\u30bf\u30fc\u30f3 – \u30af\u30e9\u30b9 \u30a2\u30c0\u30d7\u30bf\u30fc<\/h3>\n
        \u79c1\u305f\u3061\u306e\u30a2\u30c0\u30d7\u30bf\u30fc\u306e\u30af\u30e9\u30b9\u30a2\u30c0\u30d7\u30bf\u30fc\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u5b9f\u88c5\u306f\u3001\u3053\u3061\u3089\u3067\u3059\u3002<\/p>\n
        package com.scdev.design.adapter;\r\n\r\n\/\/Using inheritance for adapter pattern\r\npublic class SocketClassAdapterImpl extends Socket implements SocketAdapter{\r\n\r\n\t@Override\r\n\tpublic Volt get120Volt() {\r\n\t\treturn getVolt();\r\n\t}\r\n\r\n\t@Override\r\n\tpublic Volt get12Volt() {\r\n\t\tVolt v= getVolt();\r\n\t\treturn convertVolt(v,10);\r\n\t}\r\n\r\n\t@Override\r\n\tpublic Volt get3Volt() {\r\n\t\tVolt v= getVolt();\r\n\t\treturn convertVolt(v,40);\r\n\t}\r\n\t\r\n\tprivate Volt convertVolt(Volt v, int i) {\r\n\t\treturn new Volt(v.getVolts()\/i);\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n
        \u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3 – \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30a2\u30c0\u30d7\u30bf\u30fc\u306e\u5b9f\u88c5<\/h3>\n
        \u79c1\u305f\u3061\u306e\u30a2\u30c0\u30d7\u30bf\u30fc\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30a2\u30c0\u30d7\u30bf\u30fc\u5b9f\u88c5\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n
        package com.scdev.design.adapter;\r\n\r\npublic class SocketObjectAdapterImpl implements SocketAdapter{\r\n\r\n\t\/\/Using Composition for adapter pattern\r\n\tprivate Socket sock = new Socket();\r\n\t\r\n\t@Override\r\n\tpublic Volt get120Volt() {\r\n\t\treturn sock.getVolt();\r\n\t}\r\n\r\n\t@Override\r\n\tpublic Volt get12Volt() {\r\n\t\tVolt v= sock.getVolt();\r\n\t\treturn convertVolt(v,10);\r\n\t}\r\n\r\n\t@Override\r\n\tpublic Volt get3Volt() {\r\n\t\tVolt v= sock.getVolt();\r\n\t\treturn convertVolt(v,40);\r\n\t}\r\n\t\r\n\tprivate Volt convertVolt(Volt v, int i) {\r\n\t\treturn new Volt(v.getVolts()\/i);\r\n\t}\r\n}\r\n<\/code><\/pre>\n
        \u30a2\u30c0\u30d7\u30bf\u306e\u5b9f\u88c5\u304c2\u3064\u3042\u308a\u3001\u3069\u3061\u3089\u3082\u307b\u307c\u540c\u69d8\u3067\u3042\u308a\u3001SocketAdapter\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u307e\u3059\u3002\u30a2\u30c0\u30d7\u30bf\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u62bd\u8c61\u30af\u30e9\u30b9\u306e\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u79c1\u305f\u3061\u306e\u30a2\u30c0\u30d7\u30bf\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u5b9f\u88c5\u3092\u6d88\u8cbb\u3059\u308b\u305f\u3081\u306e\u30c6\u30b9\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3059\u3002<\/p>\n
        package com.scdev.design.test;\r\n\r\nimport com.scdev.design.adapter.SocketAdapter;\r\nimport com.scdev.design.adapter.SocketClassAdapterImpl;\r\nimport com.scdev.design.adapter.SocketObjectAdapterImpl;\r\nimport com.scdev.design.adapter.Volt;\r\n\r\npublic class AdapterPatternTest {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\t\r\n\t\ttestClassAdapter();\r\n\t\ttestObjectAdapter();\r\n\t}\r\n\r\n\tprivate static void testObjectAdapter() {\r\n\t\tSocketAdapter sockAdapter = new SocketObjectAdapterImpl();\r\n\t\tVolt v3 = getVolt(sockAdapter,3);\r\n\t\tVolt v12 = getVolt(sockAdapter,12);\r\n\t\tVolt v120 = getVolt(sockAdapter,120);\r\n\t\tSystem.out.println(\"v3 volts using Object Adapter=\"+v3.getVolts());\r\n\t\tSystem.out.println(\"v12 volts using Object Adapter=\"+v12.getVolts());\r\n\t\tSystem.out.println(\"v120 volts using Object Adapter=\"+v120.getVolts());\r\n\t}\r\n\r\n\tprivate static void testClassAdapter() {\r\n\t\tSocketAdapter sockAdapter = new SocketClassAdapterImpl();\r\n\t\tVolt v3 = getVolt(sockAdapter,3);\r\n\t\tVolt v12 = getVolt(sockAdapter,12);\r\n\t\tVolt v120 = getVolt(sockAdapter,120);\r\n\t\tSystem.out.println(\"v3 volts using Class Adapter=\"+v3.getVolts());\r\n\t\tSystem.out.println(\"v12 volts using Class Adapter=\"+v12.getVolts());\r\n\t\tSystem.out.println(\"v120 volts using Class Adapter=\"+v120.getVolts());\r\n\t}\r\n\t\r\n\tprivate static Volt getVolt(SocketAdapter sockAdapter, int i) {\r\n\t\tswitch (i){\r\n\t\tcase 3: return sockAdapter.get3Volt();\r\n\t\tcase 12: return sockAdapter.get12Volt();\r\n\t\tcase 120: return sockAdapter.get120Volt();\r\n\t\tdefault: return sockAdapter.get120Volt();\r\n\t\t}\r\n\t}\r\n}\r\n<\/code><\/pre>\n
        \u4e0a\u8a18\u306e\u30c6\u30b9\u30c8\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u6b21\u306e\u51fa\u529b\u304c\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n
        v3 volts using Class Adapter=3\r\nv12 volts using Class Adapter=12\r\nv120 volts using Class Adapter=120\r\nv3 volts using Object Adapter=3\r\nv12 volts using Object Adapter=12\r\nv120 volts using Object Adapter=120\r\n<\/code><\/pre>\n
        \u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u30af\u30e9\u30b9\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u3092\u65e5\u672c\u8a9e\u3067\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/h3>\n
        JDK\u306b\u304a\u3051\u308b\u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4f8b<\/h3>\n
        JDK\u30af\u30e9\u30b9\u3067\u5bb9\u6613\u306b\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u30a2\u30c0\u30d7\u30bf\u30fc\u306e\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4f8b\u306e\u4e00\u90e8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
          \n
        • java.util.Arrays#asList()<\/li>\n
        • java.io.InputStreamReader(InputStream) (returns a Reader)<\/li>\n
        • java.io.OutputStreamWriter(OutputStream) (returns a Writer)<\/li>\n<\/ul>\n
          Java\u306b\u304a\u3051\u308b\u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0a\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
          \u30a2\u30c0\u30d7\u30bf\u30fc\u30fb\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u69cb\u9020\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\u3042\u308a\u3001\u7121\u95a2\u4fc2\u306a\u4e8c\u3064\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u9023\u643a\u3055\u305b\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u7121\u95a2\u4fc2\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7d50\u3076\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30a2\u30c0\u30d7\u30bf\u30fc\u3068\u547c\u3073\u307e\u3059\u3002 \u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4 […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-875","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\nJava\u306b\u304a\u3051\u308b\u30a2\u30c0\u30d7\u30bf\u30fc\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3002 - 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