{"id":1891,"date":"2022-11-28T22:00:00","date_gmt":"2022-11-28T14:00:00","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1891"},"modified":"2022-11-28T22:00:00","modified_gmt":"2022-11-28T14:00:00","slug":"java%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%e5%88%86%e6%9e%90%e5%92%8c%e8%a7%a3%e5%86%b3","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1891","title":{"rendered":"Java\u5185\u5b58\u6cc4\u6f0f\u5206\u6790\u548c\u89e3\u51b3"},"content":{"rendered":"\n
\"\"<\/div><\/figure>\n\n\n\n
  1. \u4ec0\u4e48\u662f\u5185\u5b58\u6cc4\u6f0f\uff1f
    \u5185\u5b58\u6cc4\u6f0f\uff1a\u5bf9\u8c61\u5df2\u7ecf\u6ca1\u6709\u88ab\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\uff0c\u4f46\u662f\u5783\u573e\u56de\u6536\u5668\u6ca1\u529e\u6cd5\u79fb\u9664\u5b83\u4eec\uff0c\u56e0\u4e3a\u8fd8\u5728\u88ab\u5f15\u7528\u7740\u3002
    \u5728Java\u4e2d\uff0c\u5185\u5b58\u6cc4\u6f0f\u5c31\u662f\u5b58\u5728\u4e00\u4e9b\u88ab\u5206\u914d\u7684\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u6709\u4e0b\u9762\u4e24\u4e2a\u7279\u70b9\uff0c\u9996\u5148\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u662f\u53ef\u8fbe\u7684\uff0c\u5373\u5728\u6709\u5411\u56fe\u4e2d\uff0c\u5b58\u5728\u901a\u8def\u53ef\u4ee5\u4e0e\u5176\u76f8\u8fde\uff1b\u5176\u6b21\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u662f\u65e0\u7528\u7684\uff0c\u5373\u7a0b\u5e8f\u4ee5\u540e\u4e0d\u4f1a\u518d\u4f7f\u7528\u8fd9\u4e9b\u5bf9\u8c61\u3002\u5982\u679c\u5bf9\u8c61\u6ee1\u8db3\u8fd9\u4e24\u4e2a\u6761\u4ef6\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u5c31\u53ef\u4ee5\u5224\u5b9a\u4e3aJava\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u4e0d\u4f1a\u88abGC\u6240\u56de\u6536\uff0c\u7136\u800c\u5b83\u5374\u5360\u7528\u5185\u5b58\u3002<\/li><\/ol>\n\n\n\n

    \u5728C++\u4e2d\uff0c\u5185\u5b58\u6cc4\u6f0f\u7684\u8303\u56f4\u66f4\u5927\u4e00\u4e9b\u3002\u6709\u4e9b\u5bf9\u8c61\u88ab\u5206\u914d\u4e86\u5185\u5b58\u7a7a\u95f4\uff0c\u7136\u540e\u5374\u4e0d\u53ef\u8fbe\uff0c\u7531\u4e8eC++\u4e2d\u6ca1\u6709GC\uff08Garbage Collection\u5783\u573e\u56de\u6536\uff09\uff0c\u8fd9\u4e9b\u5185\u5b58\u5c06\u6c38\u8fdc\u6536\u4e0d\u56de\u6765\u3002\u5728Java\u4e2d\uff0c\u8fd9\u4e9b\u4e0d\u53ef\u8fbe\u7684\u5bf9\u8c61\u90fd\u7531GC\u8d1f\u8d23\u56de\u6536\uff0c\u56e0\u6b64\u7a0b\u5e8f\u5458\u4e0d\u9700\u8981\u8003\u8651\u8fd9\u90e8\u5206\u7684\u5185\u5b58\u6cc4\u9732\u3002<\/p>\n\n\n\n

    \u901a\u8fc7\u5206\u6790\uff0c\u6211\u4eec\u5f97\u77e5\uff0c\u5bf9\u4e8eC++\uff0c\u7a0b\u5e8f\u5458\u9700\u8981\u81ea\u5df1\u7ba1\u7406\u8fb9\u548c\u9876\u70b9\uff0c\u800c\u5bf9\u4e8eJava\u7a0b\u5e8f\u5458\u53ea\u9700\u8981\u7ba1\u7406\u8fb9\u5c31\u53ef\u4ee5\u4e86(\u4e0d\u9700\u8981\u7ba1\u7406\u9876\u70b9\u7684\u91ca\u653e)\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0cJava\u63d0\u9ad8\u4e86\u7f16\u7a0b\u7684\u6548\u7387\u3002
    <\/p>\n\n\n\n

    \"\"<\/div><\/figure>\n\n\n\n

    \u56e0\u6b64\uff0c\u901a\u8fc7\u4ee5\u4e0a\u5206\u6790\uff0c\u6211\u4eec\u77e5\u9053\u5728Java\u4e2d\u4e5f\u6709\u5185\u5b58\u6cc4\u6f0f\uff0c\u4f46\u8303\u56f4\u6bd4C++\u8981\u5c0f\u4e00\u4e9b\u3002\u56e0\u4e3aJava\u4ece\u8bed\u8a00\u4e0a\u4fdd\u8bc1\uff0c\u4efb\u4f55\u5bf9\u8c61\u90fd\u662f\u53ef\u8fbe\u7684\uff0c\u6240\u6709\u7684\u4e0d\u53ef\u8fbe\u5bf9\u8c61\u90fd\u7531GC\u7ba1\u7406\u3002<\/p>\n\n\n\n

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    \u4e0b\u9762\u7ed9\u51fa\u4e00\u4e2a Java \u5185\u5b58\u6cc4\u6f0f\u7684\u5178\u578b\u4f8b\u5b50\uff0c<\/p>\n\n\n\n

    Vector v = new Vector(10);\r\n\r\nfor (int i = 0; i < 100; i++) {\r\n    Object o = new Object();\r\n    v.add(o);\r\n    o = null;\r\n}\r\n<\/code><\/pre>\n\n\n\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5faa\u73af\u7533\u8bf7Object\u5bf9\u8c61\uff0c\u5e76\u5c06\u6240\u7533\u8bf7\u7684\u5bf9\u8c61\u653e\u5165\u4e00\u4e2a Vector \u4e2d\uff0c\u5982\u679c\u6211\u4eec\u4ec5\u4ec5\u91ca\u653e\u5f15\u7528\u672c\u8eab\uff0c\u90a3\u4e48 Vector \u4ecd\u7136\u5f15\u7528\u8be5\u5bf9\u8c61\uff0c\u6240\u4ee5\u8fd9\u4e2a\u5bf9\u8c61\u5bf9 GC \u6765\u8bf4\u662f\u4e0d\u53ef\u56de\u6536\u7684\u3002\u56e0\u6b64\uff0c\u5982\u679c\u5bf9\u8c61\u52a0\u5165\u5230Vector \u540e\uff0c\u8fd8\u5fc5\u987b\u4ece Vector \u4e2d\u5220\u9664\uff0c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u5c31\u662f\u5c06 Vector \u5bf9\u8c61\u8bbe\u7f6e\u4e3a null\u3002
    \u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014<\/p>\n\n\n\n
    v = null\r\n<\/code><\/pre>\n\n\n\n

    \u8981\u60f3\u7406\u89e3\u8fd9\u4e2a\u5b9a\u4e49\uff0c\u6211\u4eec\u9700\u8981\u5148\u4e86\u89e3\u4e00\u4e0b\u5bf9\u8c61\u5728\u5185\u5b58\u4e2d\u7684\u72b6\u6001\u3002\u4e0b\u9762\u7684\u8fd9\u5f20\u56fe\u5c31\u89e3\u91ca\u4e86\u4ec0\u4e48\u662f\u65e0\u7528\u5bf9\u8c61<\/strong>\u4ee5\u53ca\u4ec0\u4e48\u662f\u672a\u88ab\u5f15\u7528\u5bf9\u8c61<\/strong>\u3002<\/p>\n\n\n\n
    \"\"<\/div><\/figure>\n\n\n\n
    \u4e0a\u9762\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u91cc\u9762\u6709\u88ab\u5f15\u7528\u5bf9\u8c61\u548c\u672a\u88ab\u5f15\u7528\u5bf9\u8c61\u3002\u672a\u88ab\u5f15\u7528\u5bf9\u8c61\u4f1a\u88ab\u5783\u573e\u56de\u6536\u5668\u56de\u6536\uff0c\u800c\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u5374\u4e0d\u4f1a\u3002\u672a\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u5f53\u7136\u662f\u4e0d\u518d\u88ab\u4f7f\u7528\u7684\u5bf9\u8c61\uff0c\u56e0\u4e3a\u6ca1\u6709\u5bf9\u8c61\u518d\u5f15\u7528\u5b83\u3002\u7136\u800c\u65e0\u7528\u5bf9\u8c61\u5374\u4e0d\u5168\u662f\u672a\u88ab\u5f15\u7528\u5bf9\u8c61\u3002\u5176\u4e2d\u8fd8\u6709\u88ab\u5f15\u7528\u7684\u3002\u5c31\u662f\u8fd9\u79cd\u60c5\u51b5\u5bfc\u81f4\u4e86\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n\n\n\n
    1. \u8be6\u7ec6Java\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f
      2.1 Java\u5185\u5b58\u56de\u6536\u673a\u5236
      \u4e0d\u8bba\u54ea\u79cd\u8bed\u8a00\u7684\u5185\u5b58\u5206\u914d\u65b9\u5f0f\uff0c\u90fd\u9700\u8981\u8fd4\u56de\u6240\u5206\u914d\u5185\u5b58\u7684\u771f\u5b9e\u5730\u5740\uff0c\u4e5f\u5c31\u662f\u8fd4\u56de\u4e00\u4e2a\u6307\u9488\u5230\u5185\u5b58\u5757\u7684\u9996\u5730\u5740\u3002Java\u4e2d\u5bf9\u8c61\u662f\u91c7\u7528new\u6216\u8005\u53cd\u5c04\u7684\u65b9\u6cd5\u521b\u5efa\u7684\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u7684\u521b\u5efa\u90fd\u662f\u5728\u5806\uff08Heap\uff09\u4e2d\u5206\u914d\u7684\uff0c\u6240\u6709\u5bf9\u8c61\u7684\u56de\u6536\u90fd\u662f\u7531Java\u865a\u62df\u673a\u901a\u8fc7\u5783\u573e\u56de\u6536\u673a\u5236\u5b8c\u6210\u7684\u3002GC\u4e3a\u4e86\u80fd\u591f\u6b63\u786e\u91ca\u653e\u5bf9\u8c61\uff0c\u4f1a\u76d1\u63a7\u6bcf\u4e2a\u5bf9\u8c61\u7684\u8fd0\u884c\u72b6\u51b5\uff0c\u5bf9\u4ed6\u4eec\u7684\u7533\u8bf7\u3001\u5f15\u7528\u3001\u88ab\u5f15\u7528\u3001\u8d4b\u503c\u7b49\u72b6\u51b5\u8fdb\u884c\u76d1\u63a7\uff0cJava\u4f1a\u4f7f\u7528\u6709\u5411\u56fe\u7684\u65b9\u6cd5\u8fdb\u884c\u7ba1\u7406\u5185\u5b58\uff0c\u5b9e\u65f6\u76d1\u63a7\u5bf9\u8c61\u662f\u5426\u53ef\u4ee5\u8fbe\u5230\uff0c\u5982\u679c\u4e0d\u53ef\u5230\u8fbe\uff0c\u5219\u5c31\u5c06\u5176\u56de\u6536\uff0c\u8fd9\u6837\u4e5f\u53ef\u4ee5\u6d88\u9664\u5f15\u7528\u5faa\u73af\u7684\u95ee\u9898\u3002\u5728Java\u8bed\u8a00\u4e2d\uff0c\u5224\u65ad\u4e00\u4e2a\u5185\u5b58\u7a7a\u95f4\u662f\u5426\u7b26\u5408\u5783\u573e\u6536\u96c6\u7684\u6807\u51c6\u6709\u4e24\u4e2a\uff1a\u4e00\u4e2a\u662f\u7ed9\u5bf9\u8c61\u8d4b\u4e88\u4e86\u7a7a\u503cnull\uff0c\u4ee5\u4e0b\u518d\u6ca1\u6709\u8c03\u7528\u8fc7\u53e6\u4e00\u4e2a\u662f\u7ed9\u5bf9\u8c61\u8d4b\u4e88\u4e86\u65b0\u503c\uff0c\u8fd9\u6837\u91cd\u65b0\u5206\u914d\u4e86\u5185\u5b58\u7a7a\u95f4\u3002<\/li><\/ol>\n\n\n\n
      2.2 Java\u5185\u5b58\u6cc4\u6f0f\u5f15\u8d77\u7684\u539f\u56e0
      \u5185\u5b58\u6cc4\u6f0f\u662f\u6307\u65e0\u7528\u5bf9\u8c61\uff08\u4e0d\u518d\u4f7f\u7528\u7684\u5bf9\u8c61\uff09\u6301\u7eed\u5360\u6709\u5185\u5b58\u6216\u65e0\u7528\u5bf9\u8c61\u7684\u5185\u5b58\u5f97\u4e0d\u5230\u53ca\u65f6\u91ca\u653e\uff0c\u4ece\u800c\u9020\u6210\u5185\u5b58\u7a7a\u95f4\u7684\u6d6a\u8d39\u79f0\u4e3a\u5185\u5b58\u6cc4\u6f0f\u3002\u5185\u5b58\u6cc4\u9732\u6709\u65f6\u4e0d\u4e25\u91cd\u4e14\u4e0d\u6613\u5bdf\u89c9\uff0c\u8fd9\u6837\u5f00\u53d1\u8005\u5c31\u4e0d\u77e5\u9053\u5b58\u5728\u5185\u5b58\u6cc4\u9732\uff0c\u4f46\u6709\u65f6\u4e5f\u4f1a\u5f88\u4e25\u91cd\uff0c\u4f1a\u63d0\u793a\u4f60Out of memory\u3002<\/p>\n\n\n\n
      Java\u5185\u5b58\u6cc4\u6f0f\u7684\u6839\u672c\u539f\u56e0\u662f\u4ec0\u4e48\u5462\uff1f\u957f\u751f\u547d\u5468\u671f\u7684\u5bf9\u8c61\u6301\u6709\u77ed\u751f\u547d\u5468\u671f\u5bf9\u8c61\u7684\u5f15\u7528\u5c31\u5f88\u53ef\u80fd\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\uff0c\u5c3d\u7ba1\u77ed\u751f\u547d\u5468\u671f\u5bf9\u8c61\u5df2\u7ecf\u4e0d\u518d\u9700\u8981\uff0c\u4f46\u662f\u56e0\u4e3a\u957f\u751f\u547d\u5468\u671f\u6301\u6709\u5b83\u7684\u5f15\u7528\u800c\u5bfc\u81f4\u4e0d\u80fd\u88ab\u56de\u6536\uff0c\u8fd9\u5c31\u662fJava\u4e2d\u5185\u5b58\u6cc4\u6f0f\u7684\u53d1\u751f\u573a\u666f\u3002<\/p>\n\n\n\n
      \u6765\u5148\u770b\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\uff0c\u4e3a\u4ec0\u4e48\u4f1a\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\u3002\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cA\u5bf9\u8c61\u5f15\u7528B\u5bf9\u8c61\uff0cA\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\uff08t1-t4\uff09\u6bd4B\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\uff08t2-t3\uff09\u957f\u7684\u591a\u3002\u5f53B\u5bf9\u8c61\u6ca1\u6709\u88ab\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u4e4b\u540e\uff0cA\u5bf9\u8c61\u4ecd\u7136\u5728\u5f15\u7528\u7740B\u5bf9\u8c61\u3002\u8fd9\u6837\uff0c\u5783\u573e\u56de\u6536\u5668\u5c31\u6ca1\u529e\u6cd5\u5c06B\u5bf9\u8c61\u4ece\u5185\u5b58\u4e2d\u79fb\u9664\uff0c\u4ece\u800c\u5bfc\u81f4\u5185\u5b58\u95ee\u9898\uff0c\u56e0\u4e3a\u5982\u679cA\u5f15\u7528\u66f4\u591a\u8fd9\u6837\u7684\u5bf9\u8c61\uff0c\u90a3\u5c06\u6709\u66f4\u591a\u7684\u672a\u88ab\u5f15\u7528\u5bf9\u8c61\u5b58\u5728\uff0c\u5e76\u6d88\u8017\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n\n\n\n
      B\u5bf9\u8c61\u4e5f\u53ef\u80fd\u4f1a\u6301\u6709\u8bb8\u591a\u5176\u4ed6\u7684\u5bf9\u8c61\uff0c\u90a3\u8fd9\u4e9b\u5bf9\u8c61\u540c\u6837\u4e5f\u4e0d\u4f1a\u88ab\u5783\u573e\u56de\u6536\u5668\u56de\u6536\u3002\u6240\u6709\u8fd9\u4e9b\u6ca1\u5728\u4f7f\u7528\u7684\u5bf9\u8c61\u5c06\u6301\u7eed\u7684\u6d88\u8017\u4e4b\u524d\u5206\u914d\u7684\u5185\u5b58\u7a7a\u95f4\u3002
      <\/p>\n\n\n\n
      \"\"<\/div><\/figure>\n\n\n\n
      \u5177\u4f53\u4e3b\u8981\u6709\u5982\u4e0b\u51e0\u5927\u7c7b\uff1a<\/p>\n\n\n\n
      <\/a>2.2.1 \u9759\u6001\u96c6\u5408\u7c7b\u5f15\u8d77\u5185\u5b58\u6cc4\u6f0f<\/h4>\n\n\n\n
      \u50cfHashMap\u3001Vector\u7b49\u7684\u4f7f\u7528\u6700\u5bb9\u6613\u51fa\u73b0\u5185\u5b58\u6cc4\u9732\uff0c\u8fd9\u4e9b\u9759\u6001\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u548c\u5e94\u7528\u7a0b\u5e8f\u4e00\u81f4\uff0c\u4ed6\u4eec\u6240\u5f15\u7528\u7684\u6240\u6709\u7684\u5bf9\u8c61Object\u4e5f\u4e0d\u80fd\u88ab\u91ca\u653e\uff0c\u56e0\u4e3a\u4ed6\u4eec\u4e5f\u5c06\u4e00\u76f4\u88abVector\u7b49\u5f15\u7528\u7740\u3002<\/p>\n\n\n\n
      \u4f8b\u5982\uff1a<\/p>\n\n\n\n
      Static Vector v = new Vector(10);\r\n\r\nfor (int i = 0; i < 100; i++) {\r\n    Object o = new Object();\r\n    v.add(o);\r\n    o = null;\r\n}\r\n<\/code><\/pre>\n\n\n\n
      \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5faa\u73af\u7533\u8bf7Object \u5bf9\u8c61\uff0c\u5e76\u5c06\u6240\u7533\u8bf7\u7684\u5bf9\u8c61\u653e\u5165\u4e00\u4e2aVector \u4e2d\uff0c\u5982\u679c\u4ec5\u4ec5\u91ca\u653e\u5f15\u7528\u672c\u8eab\uff08o=null\uff09\uff0c\u90a3\u4e48Vector \u4ecd\u7136\u5f15\u7528\u8be5\u5bf9\u8c61\uff0c\u6240\u4ee5\u8fd9\u4e2a\u5bf9\u8c61\u5bf9GC \u6765\u8bf4\u662f\u4e0d\u53ef\u56de\u6536\u7684\u3002\u56e0\u6b64\uff0c\u5982\u679c\u5bf9\u8c61\u52a0\u5165\u5230Vector \u540e\uff0c\u8fd8\u5fc5\u987b\u4eceVector \u4e2d\u5220\u9664\uff0c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u5c31\u662f\u5c06Vector\u5bf9\u8c61\u8bbe\u7f6e\u4e3anull\u3002<\/p>\n\n\n\n
      2.2.2 \u76d1\u542c\u5668
      \u5728 java \u7f16\u7a0b\u4e2d\uff0c\u6211\u4eec\u90fd\u9700\u8981\u548c\u76d1\u542c\u5668\u6253\u4ea4\u9053\uff0c\u901a\u5e38\u4e00\u4e2a\u5e94\u7528\u5f53\u4e2d\u4f1a\u7528\u5230\u5f88\u591a\u76d1\u542c\u5668\uff0c\u6211\u4eec\u4f1a\u8c03\u7528\u4e00\u4e2a\u63a7\u4ef6\u7684\u8bf8\u5982addXXXListener() \u7b49\u65b9\u6cd5\u6765\u589e\u52a0\u76d1\u542c\u5668\uff0c\u4f46\u5f80\u5f80\u5728\u91ca\u653e\u5bf9\u8c61\u7684\u65f6\u5019\u5374\u6ca1\u6709\u8bb0\u4f4f\u53bb\u5220\u9664\u8fd9\u4e9b\u76d1\u542c\u5668\uff0c\u4ece\u800c\u589e\u52a0\u4e86\u5185\u5b58\u6cc4\u6f0f\u7684\u673a\u4f1a\u3002<\/p>\n\n\n\n
      2.2.3 \u5404\u79cd\u8fde\u63a5
      \u6bd4\u5982\u6570\u636e\u5e93\u8fde\u63a5\uff08dataSourse.getConnection()\uff09\uff0c\u7f51\u7edc\u8fde\u63a5(socket)\u548cio\u8fde\u63a5\uff0c\u9664\u975e\u5176\u663e\u5f0f\u7684\u8c03\u7528\u4e86\u5176close() \u65b9\u6cd5\u5c06\u5176\u8fde\u63a5\u5173\u95ed\uff0c\u5426\u5219\u662f\u4e0d\u4f1a\u81ea\u52a8\u88abGC \u56de\u6536\u7684\u3002\u5bf9\u4e8eResultset \u548cStatement \u5bf9\u8c61\u53ef\u4ee5\u4e0d\u8fdb\u884c\u663e\u5f0f\u56de\u6536\uff0c\u4f46Connection \u4e00\u5b9a\u8981\u663e\u5f0f\u56de\u6536\uff0c\u56e0\u4e3aConnection \u5728\u4efb\u4f55\u65f6\u5019\u90fd\u65e0\u6cd5\u81ea\u52a8\u56de\u6536\uff0c\u800cConnection\u4e00\u65e6\u56de\u6536\uff0cResultset \u548cStatement \u5bf9\u8c61\u5c31\u4f1a\u7acb\u5373\u4e3aNULL\u3002\u4f46\u662f\u5982\u679c\u4f7f\u7528\u8fde\u63a5\u6c60\uff0c\u60c5\u51b5\u5c31\u4e0d\u4e00\u6837\u4e86\uff0c\u9664\u4e86\u8981\u663e\u5f0f\u5730\u5173\u95ed\u8fde\u63a5\uff0c\u8fd8\u5fc5\u987b\u663e\u5f0f\u5730\u5173\u95edResultset Statement \u5bf9\u8c61\uff08\u5173\u95ed\u5176\u4e2d\u4e00\u4e2a\uff0c\u53e6\u5916\u4e00\u4e2a\u4e5f\u4f1a\u5173\u95ed\uff09\uff0c\u5426\u5219\u5c31\u4f1a\u9020\u6210\u5927\u91cf\u7684Statement \u5bf9\u8c61\u65e0\u6cd5\u91ca\u653e\uff0c\u4ece\u800c\u5f15\u8d77\u5185\u5b58\u6cc4\u6f0f\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4e00\u822c\u90fd\u4f1a\u5728try \u91cc\u9762\u53bb\u7684\u8fde\u63a5\uff0c\u5728finally\u91cc\u9762\u91ca\u653e\u8fde\u63a5\u3002<\/p>\n\n\n\n
      2.2.4 \u5185\u90e8\u7c7b\u548c\u5916\u90e8\u6a21\u5757\u7684\u5f15\u7528
      \u5185\u90e8\u7c7b\u7684\u5f15\u7528\u662f\u6bd4\u8f83\u5bb9\u6613\u9057\u5fd8\u7684\u4e00\u79cd\uff0c\u800c\u4e14\u4e00\u65e6\u6ca1\u91ca\u653e\u53ef\u80fd\u5bfc\u81f4\u4e00\u7cfb\u5217\u7684\u540e\u7ee7\u7c7b\u5bf9\u8c61\u6ca1\u6709\u91ca\u653e\u3002\u6b64\u5916\u7a0b\u5e8f\u5458\u8fd8\u8981\u5c0f\u5fc3\u5916\u90e8\u6a21\u5757\u4e0d\u7ecf\u610f\u7684\u5f15\u7528\uff0c\u4f8b\u5982\u7a0b\u5e8f\u5458A \u8d1f\u8d23A \u6a21\u5757\uff0c\u8c03\u7528\u4e86B \u6a21\u5757\u7684\u4e00\u4e2a\u65b9\u6cd5\u5982\uff1a<\/p>\n\n\n\n
      public void registerMsg(Object b);\r\n<\/code><\/pre>\n\n\n\n
      \u8fd9\u79cd\u8c03\u7528\u5c31\u8981\u975e\u5e38\u5c0f\u5fc3\u4e86\uff0c\u4f20\u5165\u4e86\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5f88\u53ef\u80fd\u6a21\u5757B\u5c31\u4fdd\u6301\u4e86\u5bf9\u8be5\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u8fd9\u65f6\u5019\u5c31\u9700\u8981\u6ce8\u610f\u6a21\u5757B\u662f\u5426\u63d0\u4f9b\u76f8\u5e94\u7684\u64cd\u4f5c\u53bb\u9664\u5f15\u7528\u3002<\/p>\n\n\n\n
      2.2.5 \u5355\u4f8b\u6a21\u5f0f
      \u4e0d\u6b63\u786e\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\u662f\u5f15\u8d77\u5185\u5b58\u6cc4\u6f0f\u7684\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\uff0c\u5355\u4f8b\u5bf9\u8c61\u5728\u521d\u59cb\u5316\u540e\u5c06\u5728 JVM \u7684\u6574\u4e2a\u751f\u547d\u5468\u671f\u4e2d\u5b58\u5728\uff08\u4ee5\u9759\u6001\u53d8\u91cf\u7684\u65b9\u5f0f\uff09\uff0c\u5982\u679c\u5355\u4f8b\u5bf9\u8c61\u6301\u6709\u5916\u90e8\u7684\u5f15\u7528\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5bf9\u8c61\u5c06\u4e0d\u80fd\u88ab JVM \u6b63\u5e38\u56de\u6536\uff0c\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\uff0c\u8003\u8651\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n
      public class A {\r\n    public A() {\r\n        B.getInstance().setA(this);\r\n    }\r\n    ...\r\n}\r\n\r\n\/\/B\u7c7b\u91c7\u7528\u5355\u4f8b\u6a21\u5f0f\r\nclass B{\r\n    private A a;\r\n    private static B instance = new B();\r\n    \r\n    public B(){}\r\n    \r\n    public static B getInstance() {\r\n        return instance;\r\n    }\r\n    \r\n    public void setA(A a) {\r\n        this.a = a;\r\n    }\r\n\r\n    public A getA() {\r\n        return a;\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n
      1. Java \u5185\u5b58\u5206\u914d\u7b56\u7565
        Java \u7a0b\u5e8f\u8fd0\u884c\u65f6\u7684\u5185\u5b58\u5206\u914d\u7b56\u7565\u6709\u4e09\u79cd,\u5206\u522b\u662f\u9759\u6001\u5206\u914d,\u6808\u5f0f\u5206\u914d,\u548c\u5806\u5f0f\u5206\u914d\uff0c\u5bf9\u5e94\u7684\uff0c\u4e09\u79cd\u5b58\u50a8\u7b56\u7565\u4f7f\u7528\u7684\u5185\u5b58\u7a7a\u95f4\u4e3b\u8981\u5206\u522b\u662f\u9759\u6001\u5b58\u50a8\u533a\uff08\u4e5f\u79f0\u65b9\u6cd5\u533a\uff09\u3001\u6808\u533a\u548c\u5806\u533a\u3002<\/li><\/ol>\n\n\n\n
        \u9759\u6001\u5b58\u50a8\u533a\uff08\u65b9\u6cd5\u533a\uff09\uff1a\u4e3b\u8981\u5b58\u653e\u9759\u6001\u6570\u636e\u3001\u5168\u5c40 static \u6570\u636e\u548c\u5e38\u91cf\u3002\u8fd9\u5757\u5185\u5b58\u5728\u7a0b\u5e8f\u7f16\u8bd1\u65f6\u5c31\u5df2\u7ecf\u5206\u914d\u597d\uff0c\u5e76\u4e14\u5728\u7a0b\u5e8f\u6574\u4e2a\u8fd0\u884c\u671f\u95f4\u90fd\u5b58\u5728\u3002<\/p>\n\n\n\n
        \u6808\u533a \uff1a\u5f53\u65b9\u6cd5\u88ab\u6267\u884c\u65f6\uff0c\u65b9\u6cd5\u4f53\u5185\u7684\u5c40\u90e8\u53d8\u91cf\uff08\u5176\u4e2d\u5305\u62ec\u57fa\u7840\u6570\u636e\u7c7b\u578b\u3001\u5bf9\u8c61\u7684\u5f15\u7528\uff09\u90fd\u5728\u6808\u4e0a\u521b\u5efa\uff0c\u5e76\u5728\u65b9\u6cd5\u6267\u884c\u7ed3\u675f\u65f6\u8fd9\u4e9b\u5c40\u90e8\u53d8\u91cf\u6240\u6301\u6709\u7684\u5185\u5b58\u5c06\u4f1a\u81ea\u52a8\u88ab\u91ca\u653e\u3002\u56e0\u4e3a\u6808\u5185\u5b58\u5206\u914d\u8fd0\u7b97\u5185\u7f6e\u4e8e\u5904\u7406\u5668\u7684\u6307\u4ee4\u96c6\u4e2d\uff0c\u6548\u7387\u5f88\u9ad8\uff0c\u4f46\u662f\u5206\u914d\u7684\u5185\u5b58\u5bb9\u91cf\u6709\u9650\u3002<\/p>\n\n\n\n
        \u5806\u533a \uff1a \u53c8\u79f0\u52a8\u6001\u5185\u5b58\u5206\u914d\uff0c\u901a\u5e38\u5c31\u662f\u6307\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u76f4\u63a5 new \u51fa\u6765\u7684\u5185\u5b58\uff0c\u4e5f\u5c31\u662f\u5bf9\u8c61\u7684\u5b9e\u4f8b\u3002\u8fd9\u90e8\u5206\u5185\u5b58\u5728\u4e0d\u4f7f\u7528\u65f6\u5c06\u4f1a\u7531 Java \u5783\u573e\u56de\u6536\u5668\u6765\u8d1f\u8d23\u56de\u6536\u3002<\/p>\n\n\n\n
        3.1 \u6808\u4e0e\u5806\u7684\u533a\u522b
        \u5728\u65b9\u6cd5\u4f53\u5185\u5b9a\u4e49\u7684\uff08\u5c40\u90e8\u53d8\u91cf\uff09\u4e00\u4e9b\u57fa\u672c\u7c7b\u578b\u7684\u53d8\u91cf\u548c\u5bf9\u8c61\u7684\u5f15\u7528\u53d8\u91cf\u90fd\u662f\u5728\u65b9\u6cd5\u7684\u6808\u5185\u5b58\u4e2d\u5206\u914d\u7684\u3002\u5f53\u5728\u4e00\u6bb5\u65b9\u6cd5\u5757\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u65f6\uff0cJava \u5c31\u4f1a\u5728\u6808\u4e2d\u4e3a\u8be5\u53d8\u91cf\u5206\u914d\u5185\u5b58\u7a7a\u95f4\uff0c\u5f53\u8d85\u8fc7\u8be5\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u540e\uff0c\u8be5\u53d8\u91cf\u4e5f\u5c31\u65e0\u6548\u4e86\uff0c\u5206\u914d\u7ed9\u5b83\u7684\u5185\u5b58\u7a7a\u95f4\u4e5f\u5c06\u88ab\u91ca\u653e\u6389\uff0c\u8be5\u5185\u5b58\u7a7a\u95f4\u53ef\u4ee5\u88ab\u91cd\u65b0\u4f7f\u7528\u3002<\/p>\n\n\n\n
        \u5806\u5185\u5b58\u7528\u6765\u5b58\u653e\u6240\u6709\u7531 new \u521b\u5efa\u7684\u5bf9\u8c61\uff08\u5305\u62ec\u8be5\u5bf9\u8c61\u5176\u4e2d\u7684\u6240\u6709\u6210\u5458\u53d8\u91cf\uff09\u548c\u6570\u7ec4\u3002\u5728\u5806\u4e2d\u5206\u914d\u7684\u5185\u5b58\uff0c\u5c06\u7531 Java \u5783\u573e\u56de\u6536\u5668\u6765\u81ea\u52a8\u7ba1\u7406\u3002\u5728\u5806\u4e2d\u4ea7\u751f\u4e86\u4e00\u4e2a\u6570\u7ec4\u6216\u8005\u5bf9\u8c61\u540e\uff0c\u8fd8\u53ef\u4ee5\u5728\u6808\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u7279\u6b8a\u7684\u53d8\u91cf\uff0c\u8fd9\u4e2a\u53d8\u91cf\u7684\u53d6\u503c\u7b49\u4e8e\u6570\u7ec4\u6216\u8005\u5bf9\u8c61\u5728\u5806\u5185\u5b58\u4e2d\u7684\u9996\u5730\u5740\uff0c\u8fd9\u4e2a\u7279\u6b8a\u7684\u53d8\u91cf\u5c31\u662f\u6211\u4eec\u4e0a\u9762\u8bf4\u7684\u5f15\u7528\u53d8\u91cf\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u5f15\u7528\u53d8\u91cf\u6765\u8bbf\u95ee\u5806\u4e2d\u7684\u5bf9\u8c61\u6216\u8005\u6570\u7ec4\u3002<\/p>\n\n\n\n
        3.2 Java\u5982\u4f55\u7ba1\u7406\u5185\u5b58
        Java\u7684\u5185\u5b58\u7ba1\u7406\u5c31\u662f\u5bf9\u8c61\u7684\u5206\u914d\u548c\u91ca\u653e\u95ee\u9898\u3002\u5728 Java \u4e2d\uff0c\u7a0b\u5e8f\u5458\u9700\u8981\u901a\u8fc7\u5173\u952e\u5b57 new \u4e3a\u6bcf\u4e2a\u5bf9\u8c61\u7533\u8bf7\u5185\u5b58\u7a7a\u95f4 (\u57fa\u672c\u7c7b\u578b\u9664\u5916)\uff0c\u6240\u6709\u7684\u5bf9\u8c61\u90fd\u5728\u5806 (Heap)\u4e2d\u5206\u914d\u7a7a\u95f4\u3002\u53e6\u5916\uff0c\u5bf9\u8c61\u7684\u91ca\u653e\u662f\u7531 GC \u51b3\u5b9a\u548c\u6267\u884c\u7684\u3002\u5728 Java \u4e2d\uff0c\u5185\u5b58\u7684\u5206\u914d\u662f\u7531\u7a0b\u5e8f\u5b8c\u6210\u7684\uff0c\u800c\u5185\u5b58\u7684\u91ca\u653e\u662f\u7531 GC \u5b8c\u6210\u7684\uff0c\u8fd9\u79cd\u6536\u652f\u4e24\u6761\u7ebf\u7684\u65b9\u6cd5\u786e\u5b9e\u7b80\u5316\u4e86\u7a0b\u5e8f\u5458\u7684\u5de5\u4f5c\u3002\u4f46\u540c\u65f6\uff0c\u5b83\u4e5f\u52a0\u91cd\u4e86JVM\u7684\u5de5\u4f5c\u3002\u8fd9\u4e5f\u662f Java \u7a0b\u5e8f\u8fd0\u884c\u901f\u5ea6\u8f83\u6162\u7684\u539f\u56e0\u4e4b\u4e00\u3002\u56e0\u4e3aGC \u4e3a\u4e86\u80fd\u591f\u6b63\u786e\u91ca\u653e\u5bf9\u8c61\uff0cGC \u5fc5\u987b\u76d1\u63a7\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u7684\u8fd0\u884c\u72b6\u6001\uff0c\u5305\u62ec\u5bf9\u8c61\u7684\u7533\u8bf7\u3001\u5f15\u7528\u3001\u88ab\u5f15\u7528\u3001\u8d4b\u503c\u7b49\uff0cGC \u90fd\u9700\u8981\u8fdb\u884c\u76d1\u63a7\u3002<\/p>\n\n\n\n
        \u76d1\u89c6\u5bf9\u8c61\u72b6\u6001\u662f\u4e3a\u4e86\u66f4\u52a0\u51c6\u786e\u5730\u3001\u53ca\u65f6\u5730\u91ca\u653e\u5bf9\u8c61\uff0c\u800c\u91ca\u653e\u5bf9\u8c61\u7684\u6839\u672c\u539f\u5219\u5c31\u662f\u8be5\u5bf9\u8c61\u4e0d\u518d\u88ab\u5f15\u7528\u3002<\/p>\n\n\n\n
        \u4e3a\u4e86\u66f4\u597d\u7406\u89e3 GC \u7684\u5de5\u4f5c\u539f\u7406\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5bf9\u8c61\u8003\u8651\u4e3a\u6709\u5411\u56fe\u7684\u9876\u70b9\uff0c\u5c06\u5f15\u7528\u5173\u7cfb\u8003\u8651\u4e3a\u56fe\u7684\u6709\u5411\u8fb9\uff0c\u6709\u5411\u8fb9\u4ece\u5f15\u7528\u8005\u6307\u5411\u88ab\u5f15\u5bf9\u8c61\u3002\u53e6\u5916\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u5bf9\u8c61\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u56fe\u7684\u8d77\u59cb\u9876\u70b9\uff0c\u4f8b\u5982\u5927\u591a\u7a0b\u5e8f\u4ece main \u8fdb\u7a0b\u5f00\u59cb\u6267\u884c\uff0c\u90a3\u4e48\u8be5\u56fe\u5c31\u662f\u4ee5 main \u8fdb\u7a0b\u9876\u70b9\u5f00\u59cb\u7684\u4e00\u68f5\u6839\u6811\u3002\u5728\u8fd9\u4e2a\u6709\u5411\u56fe\u4e2d\uff0c\u6839\u9876\u70b9\u53ef\u8fbe\u7684\u5bf9\u8c61\u90fd\u662f\u6709\u6548\u5bf9\u8c61\uff0cGC\u5c06\u4e0d\u56de\u6536\u8fd9\u4e9b\u5bf9\u8c61\u3002\u5982\u679c\u67d0\u4e2a\u5bf9\u8c61 (\u8fde\u901a\u5b50\u56fe)\u4e0e\u8fd9\u4e2a\u6839\u9876\u70b9\u4e0d\u53ef\u8fbe(\u6ce8\u610f\uff0c\u8be5\u56fe\u4e3a\u6709\u5411\u56fe)\uff0c\u90a3\u4e48\u6211\u4eec\u8ba4\u4e3a\u8fd9\u4e2a(\u8fd9\u4e9b)\u5bf9\u8c61\u4e0d\u518d\u88ab\u5f15\u7528\uff0c\u53ef\u4ee5\u88ab GC \u56de\u6536\u3002<\/p>\n\n\n\n
        \u4ee5\u4e0b\uff0c\u6211\u4eec\u4e3e\u4e00\u4e2a\u4f8b\u5b50\u8bf4\u660e\u5982\u4f55\u7528\u6709\u5411\u56fe\u8868\u793a\u5185\u5b58\u7ba1\u7406\u3002\u5bf9\u4e8e\u7a0b\u5e8f\u7684\u6bcf\u4e00\u4e2a\u65f6\u523b\uff0c\u6211\u4eec\u90fd\u6709\u4e00\u4e2a\u6709\u5411\u56fe\u8868\u793aJVM\u7684\u5185\u5b58\u5206\u914d\u60c5\u51b5\u3002\u4ee5\u4e0b\u53f3\u56fe\uff0c\u5c31\u662f\u5de6\u8fb9\u7a0b\u5e8f\u8fd0\u884c\u5230\u7b2c6\u884c\u7684\u793a\u610f\u56fe\u3002<\/p>\n\n\n\n
        public class Test {\r\n\r\n    public static void main(String[] args) {\r\n        \/\/ TODO Auto-generated method stub\r\n        Object o1 = new Object();\r\n        Object o2 = new Object();\r\n        o2 = o1;\/\/\u6b64\u884c\u4e3a\u7b2c6\u884c\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n
        \"\"<\/div><\/figure>\n\n\n\n
        1. \u5982\u4f55\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f\u7684\u53d1\u751f\uff1f
          \u5728\u4e86\u89e3\u4e86\u5f15\u8d77\u5185\u5b58\u6cc4\u6f0f\u7684\u4e00\u4e9b\u539f\u56e0\u540e\uff0c\u5e94\u8be5\u5c3d\u53ef\u80fd\u5730\u907f\u514d\u548c\u53d1\u73b0\u5185\u5b58\u6cc4\u6f0f\u3002<\/li><\/ol>\n\n\n\n
          4.1 \u597d\u7684\u7f16\u7801\u4e60\u60ef
          \u6700\u57fa\u672c\u7684\u5efa\u8bae\u5c31\u662f\u5c3d\u65e9\u91ca\u653e\u65e0\u7528\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u5927\u591a\u6570\u7a0b\u5e8f\u5458\u5728\u4f7f\u7528\u4e34\u65f6\u53d8\u91cf\u7684\u65f6\u5019\uff0c\u90fd\u662f\u8ba9\u5f15\u7528\u53d8\u91cf\u5728\u9000\u51fa\u6d3b\u52a8\u57df\u540e\uff0c\u81ea\u52a8\u8bbe\u7f6e\u4e3a null \u3002\u5728\u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u65f6\u5019\uff0c\u5fc5\u987b\u7279\u522b\u6ce8\u610f\u4e00\u4e9b\u590d\u6742\u7684\u5bf9\u8c61\u56fe\uff0c\u4f8b\u5982\u6570\u7ec4\u3001\u5217\u3001\u6811\u3001\u56fe\u7b49\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u4e4b\u95f4\u6709\u76f8\u4e92\u5f15\u7528\u5173\u7cfb\u8f83\u4e3a\u590d\u6742\u3002\u5bf9\u4e8e\u8fd9\u7c7b\u5bf9\u8c61\uff0cGC \u56de\u6536\u5b83\u4eec\u4e00\u822c\u6548\u7387\u8f83\u4f4e\u3002\u5982\u679c\u7a0b\u5e8f\u5141\u8bb8\uff0c\u5c3d\u65e9\u5c06\u4e0d\u7528\u7684\u5f15\u7528\u5bf9\u8c61\u8d4b\u4e3anull\u3002\u53e6\u5916\u5efa\u8bae\u51e0\u70b9\uff1a<\/p>\n\n\n\n
          \u5728\u786e\u8ba4\u4e00\u4e2a\u5bf9\u8c61\u65e0\u7528\u540e\uff0c\u5c06\u5176\u6240\u6709\u5f15\u7528\u663e\u5f0f\u7684\u7f6e\u4e3anull\uff1b<\/p>\n\n\n\n
          \u5f53\u7c7b\u4ece Jpanel \u6216 Jdialog \u6216\u5176\u5b83\u5bb9\u5668\u7c7b\u7ee7\u627f\u7684\u65f6\u5019\uff0c\u5220\u9664\u8be5\u5bf9\u8c61\u4e4b\u524d\u4e0d\u59a8\u8c03\u7528\u5b83\u7684 removeall() \u65b9\u6cd5\uff1b\u5728\u8bbe\u4e00\u4e2a\u5f15\u7528\u53d8\u91cf\u4e3a null \u503c\u4e4b\u524d\uff0c\u5e94\u6ce8\u610f\u8be5\u5f15\u7528\u53d8\u91cf\u6307\u5411\u7684\u5bf9\u8c61\u662f\u5426\u88ab\u76d1\u542c\uff0c\u82e5\u6709\uff0c\u8981\u9996\u5148\u9664\u53bb\u76d1\u542c\u5668\uff0c\u7136\u540e\u624d\u53ef\u4ee5\u8d4b\u7a7a\u503c\uff1b\u5f53\u5bf9\u8c61\u662f\u4e00\u4e2a Thread \u7684\u65f6\u5019\uff0c\u5220\u9664\u8be5\u5bf9\u8c61\u4e4b\u524d\u4e0d\u59a8\u8c03\u7528\u5b83\u7684
          interrupt() \u65b9\u6cd5\uff1b\u5185\u5b58\u68c0\u6d4b\u8fc7\u7a0b\u4e2d\u4e0d\u4ec5\u8981\u5173\u6ce8\u81ea\u5df1\u7f16\u5199\u7684\u7c7b\u5bf9\u8c61\uff0c\u540c\u65f6\u4e5f\u8981\u5173\u6ce8\u4e00\u4e9b\u57fa\u672c\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u4f8b\u5982\uff1aint[]\u3001String\u3001char[] \u7b49\u7b49\uff1b\u5982\u679c\u6709\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u4f7f\u7528 try\u2026finally \u7ed3\u6784\uff0c\u5728 finally \u4e2d\u5173\u95ed Statement \u5bf9\u8c61\u548c\u8fde\u63a5\u3002<\/p>\n\n\n\n
          4.2 \u597d\u7684\u6d4b\u8bd5\u5de5\u5177
          \u5728\u5f00\u53d1\u4e2d\u4e0d\u80fd\u5b8c\u5168\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\uff0c\u5173\u952e\u8981\u5728\u53d1\u73b0\u6709\u5185\u5b58\u6cc4\u6f0f\u7684\u65f6\u5019\u80fd\u7528\u597d\u7684\u6d4b\u8bd5\u5de5\u5177\u8fc5\u901f\u5b9a\u4f4d\u95ee\u9898\u7684\u6240\u5728\u3002\u5e02\u573a\u4e0a\u5df2\u6709\u51e0\u79cd\u4e13\u4e1a\u68c0\u67e5 Java \u5185\u5b58\u6cc4\u6f0f\u7684\u5de5\u5177\uff0c\u5b83\u4eec\u7684\u57fa\u672c\u5de5\u4f5c\u539f\u7406\u5927\u540c\u5c0f\u5f02\uff0c\u90fd\u662f\u901a\u8fc7\u76d1\u6d4b Java \u7a0b\u5e8f\u8fd0\u884c\u65f6\uff0c\u6240\u6709\u5bf9\u8c61\u7684\u7533\u8bf7\u3001\u91ca\u653e\u7b49\u52a8\u4f5c\uff0c\u5c06\u5185\u5b58\u7ba1\u7406\u7684\u6240\u6709\u4fe1\u606f\u8fdb\u884c\u7edf\u8ba1\u3001\u5206\u6790\u3001\u53ef\u89c6\u5316\u3002\u5f00\u53d1\u4eba\u5458\u5c06\u6839\u636e\u8fd9\u4e9b\u4fe1\u606f\u5224\u65ad\u7a0b\u5e8f\u662f\u5426\u6709\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u3002\u8fd9\u4e9b\u5de5\u5177\u5305\u62ec Optimizeit Profiler\u3001JProbe Profiler\u3001JinSight\u3001Rational \u516c\u53f8\u7684 Purify \u7b49\u3002<\/p>\n\n\n\n
          4.3 \u6ce8\u610f\u50cf HashMap \u3001ArrayList \u7684\u96c6\u5408\u5bf9\u8c61
          \u7279\u522b\u6ce8\u610f\u4e00\u4e9b\u50cf HashMap \u3001ArrayList \u7684\u96c6\u5408\u5bf9\u8c61\uff0c\u5b83\u4eec\u7ecf\u5e38\u4f1a\u5f15\u53d1\u5185\u5b58\u6cc4\u6f0f\u3002\u5f53\u5b83\u4eec\u88ab\u58f0\u660e\u4e3a static \u65f6\uff0c\u5b83\u4eec\u7684\u751f\u547d\u5468\u671f\u5c31\u4f1a\u548c\u5e94\u7528\u7a0b\u5e8f\u4e00\u6837\u957f\u3002<\/p>\n\n\n\n
          4.4 \u6ce8\u610f \u4e8b\u4ef6\u76d1\u542c \u548c \u56de\u8c03\u51fd\u6570
          \u7279\u522b\u6ce8\u610f \u4e8b\u4ef6\u76d1\u542c \u548c \u56de\u8c03\u51fd\u6570 \u3002\u5f53\u4e00\u4e2a\u76d1\u542c\u5668\u5728\u4f7f\u7528\u7684\u65f6\u5019\u88ab\u6ce8\u518c\uff0c\u4f46\u4e0d\u518d\u4f7f\u7528\u4e4b\u540e\u5374\u672a\u88ab\u53cd\u6ce8\u518c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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