{"id":4904,"date":"2021-01-15T07:37:17","date_gmt":"2021-01-14T22:37:17","guid":{"rendered":"https:\/\/taki-lab.site\/bocci\/?p=4904"},"modified":"2021-01-15T07:37:21","modified_gmt":"2021-01-14T22:37:21","slug":"%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%91flyweight%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3","status":"publish","type":"post","link":"https:\/\/taki-lab.site\/bocci\/?p=4904","title":{"rendered":"\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3011Flyweight\u30d1\u30bf\u30fc\u30f3"},"content":{"rendered":"\n

Flyweight\u30d1\u30bf\u30fc\u30f3\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n

package org.example.flyweight;\r\n\r\npublic class Flyweight {\r\n    public void method1() {\r\n\r\n    }\r\n\r\n    public void method2() {\r\n\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n
package org.example.flyweight;\r\n\r\nimport java.util.HashMap;\r\nimport java.util.Map;\r\n\r\npublic class FlyweightFactory {\r\n    private Map<Integer, Flyweight> pool = new HashMap<>();\r\n    private static FlyweightFactory factory = new FlyweightFactory();\r\n\r\n    private FlyweightFactory() {\r\n\r\n    }\r\n\r\n    public static FlyweightFactory getFactory() {\r\n        return factory;\r\n    }\r\n\r\n    public Flyweight getFlyweight(int key) {\r\n        Flyweight result;\r\n        boolean exist = pool.containsKey(key);\r\n        if(exist == true) {\r\n            result = pool.get(key);\r\n        } else {\r\n            result = new Flyweight();\r\n            pool.put(key, result);\r\n        }\r\n\r\n        return result;\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n
package org.example.flyweight;\r\n\r\npublic class Main {\r\n    public static void main(String[] args) {\r\n        FlyweightFactory factory = FlyweightFactory.getFactory();\r\n        Flyweight object = factory.getFlyweight(0);\r\n        object.method1();\r\n        object.method2();\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n
Flyweight\u30d1\u30bf\u30fc\u30f3\u306f\u4e00\u5ea6\u4f5c\u6210\u3057\u305f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4fdd\u6301\u3057\u3066\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u4f5c\u6210\u6642\u306e\u8ca0\u8377\u3092\u8efd\u6e1b\u3055\u305b\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306fFlyweight\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092FlyweightFactory\u5185\u306epool\u306b\u4fdd\u6301\u3057\u3001\u4e00\u5ea6\u4f7f\u7528\u3057\u305f\u3082\u306e\u306fpool\u304b\u3089\u53d6\u5f97\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
FlyweightFactory\u306fSingleton\u30d1\u30bf\u30fc\u30f3\u3067\u4f7f\u7528\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n
\n
\u3010\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3011Singleton\u30d1\u30bf\u30fc\u30f3<\/a><\/blockquote>