{"id":54358,"date":"2023-09-19T10:46:43","date_gmt":"2023-09-19T02:46:43","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=54358"},"modified":"2023-09-19T10:46:45","modified_gmt":"2023-09-19T02:46:45","slug":"%e4%bd%bf%e7%94%a8%e5%ae%b9%e5%99%a8%e7%b1%bb%e5%88%a0%e9%99%a4%e5%af%b9%e8%b1%a1%e8%b7%9fgc%e5%9b%9e%e6%94%b6%e5%af%b9%e8%b1%a1%e7%9a%84%e5%8c%ba%e5%88%ab%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/54358.html","title":{"rendered":"\u4f7f\u7528\u5bb9\u5668\u7c7b\u5220\u9664\u5bf9\u8c61\u8ddfGC\u56de\u6536\u5bf9\u8c61\u7684\u533a\u522b\u662f\u4ec0\u4e48"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\">\n<p>\u4f7f\u7528\u5bb9\u5668\u7c7b\u5220\u9664\u5bf9\u8c61\u548cJava\u7684\u5783\u573e\u56de\u6536(GC)\u5904\u7406\u5bf9\u8c61\u7684\u533a\u522b\u4e3b\u8981\u5305\u62ec\uff1a1\u3001\u6267\u884c\u65f6\u95f4\u4e0d\u540c\uff1b2\u3001\u5904\u7406\u65b9\u5f0f\u4e0d\u540c\uff1b3\u3001\u5bf9\u8c61\u72b6\u6001\u7684\u4e0d\u540c\uff1b4\u3001\u5185\u5b58\u7ba1\u7406\u7684\u76ee\u7684\uff1b5\u3001\u624b\u52a8\u4e0e\u81ea\u52a8\u7684\u64cd\u4f5c\u5dee\u5f02\u3002\u5176\u4e2d\uff0c\u5bb9\u5668\u7c7b\u7684\u5220\u9664\u64cd\u4f5c\u66f4\u6ce8\u91cd\u6570\u636e\u7ed3\u6784\u4e2d\u7684\u5bf9\u8c61\u7ba1\u7406\uff0c\u800cGC\u5219\u4fa7\u91cd\u4e8e\u5185\u5b58\u4f18\u5316\u548c\u7a7a\u95f4\u56de\u6536\u3002<\/p>\n<\/blockquote>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"680\" height=\"421\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/09\/680-62.jpg?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"\" class=\"wp-image-54362\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\">1\u3001\u6267\u884c\u65f6\u95f4\u4e0d\u540c <\/h2>\n\n\n\n<p>\u4f7f\u7528\u5bb9\u5668\u7c7b(\u5982ArrayList, HashMap\u7b49)\u5220\u9664\u5bf9\u8c61\u662f\u4e00\u4e2a\u660e\u786e\u548c\u7acb\u5373\u7684\u64cd\u4f5c\u3002\u5f53\u4f60\u8c03\u7528\u4e86\u5220\u9664\u65b9\u6cd5\u540e\uff0c\u5bf9\u8c61\u4f1a\u88ab\u7acb\u5373\u4ece\u5bb9\u5668\u4e2d\u79fb\u9664\u3002\u800cGC\u56de\u6536\u5bf9\u8c61\u662f\u4e00\u4e2a\u4e0d\u786e\u5b9a\u7684\u8fc7\u7a0b\uff0c\u5b83\u57fa\u4e8eJava\u8fd0\u884c\u65f6\u7684\u5224\u65ad\uff0c\u5f53\u7cfb\u7edf\u8ba4\u4e3a\u6709\u5fc5\u8981\u8fdb\u884c\u5783\u573e\u56de\u6536\u65f6\uff0cGC\u624d\u4f1a\u542f\u52a8\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2\u3001\u5904\u7406\u65b9\u5f0f\u4e0d\u540c 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<\/h2>\n\n\n\n<p>\u4f7f\u7528\u5bb9\u5668\u7c7b\u5220\u9664\u5bf9\u8c61\u662f\u7a0b\u5e8f\u5458\u7684\u660e\u786e\u610f\u56fe\uff0c\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u663e\u5f0f\u5730\u8fdb\u884c\u64cd\u4f5c\u3002\u800cGC\u7684\u5de5\u4f5c\u662f\u81ea\u52a8\u7684\uff0cJava\u8fd0\u884c\u73af\u5883\u4f1a\u8d1f\u8d23\u5224\u65ad\u4f55\u65f6\u6267\u884c\u5783\u573e\u56de\u6536\u3002<\/p>\n\n\n\n<p><strong>\u7ed3\u8bba<\/strong>\uff1a\u867d\u7136\u4f7f\u7528\u5bb9\u5668\u7c7b\u5220\u9664\u5bf9\u8c61\u548cGC\u56de\u6536\u5bf9\u8c61\u90fd\u6d89\u53ca\u5230\u5bf9\u8c61\u7684\u7ba1\u7406\uff0c\u4f46\u5b83\u4eec\u7684\u5173\u6ce8\u70b9\u548c\u64cd\u4f5c\u65b9\u5f0f\u90fd\u5927\u4e0d\u76f8\u540c\u3002\u5bb9\u5668\u7c7b\u7684\u5220\u9664\u64cd\u4f5c\u66f4\u591a\u7684\u662f\u4ece\u6570\u636e\u7ed3\u6784\u7684\u89d2\u5ea6\u8fdb\u884c\u7ba1\u7406\uff0c\u800cGC\u5219\u662f\u4ece\u5185\u5b58\u7ba1\u7406\u7684\u89d2\u5ea6\u6765\u770b\u5f85\u95ee\u9898\u3002\u7406\u89e3\u8fd9\u4e24\u8005\u7684\u533a\u522b\uff0c\u53ef\u4ee5\u5e2e\u52a9Java\u5f00\u53d1\u8005\u66f4\u6709\u6548\u5730\u7f16\u5199\u548c\u4f18\u5316\u4ee3\u7801\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\" \/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u5e38\u89c1\u95ee\u7b54\uff1a<\/strong><\/h2>\n\n\n\n<p><strong>Q1: \u4ece\u5bb9\u5668\u7c7b\u4e2d\u5220\u9664\u5bf9\u8c61\u540e\uff0c\u4e3a\u4ec0\u4e48\u8be5\u5bf9\u8c61\u6709\u65f6\u4ecd\u7136\u4f1a\u5b58\u5728\u4e8e\u5185\u5b58\u4e2d\uff1f<\/strong><\/p>\n\n\n\n<p><strong>A1:<\/strong> \u4ece\u5bb9\u5668\u7c7b\u4e2d\u5220\u9664\u5bf9\u8c61\u53ea\u662f\u79fb\u9664\u4e86\u8be5\u5bb9\u5668\u5bf9\u8be5\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u4f46\u5982\u679c\u8fd9\u4e2a\u5bf9\u8c61\u4ecd\u7136\u88ab\u5176\u4ed6\u5730\u65b9\u5f15\u7528\uff0c\u5b83\u5c31\u4e0d\u4f1a\u88ab\u7acb\u5373\u56de\u6536\u3002\u53ea\u6709\u5f53\u4e00\u4e2a\u5bf9\u8c61\u4e0d\u518d\u88ab\u4efb\u4f55\u5f15\u7528\u6307\u5411\u65f6\uff0cGC\u624d\u4f1a\u5728\u67d0\u4e2a\u65f6\u95f4\u70b9\u9009\u62e9\u56de\u6536\u5b83\u3002<\/p>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-layout-1 wp-block-group-is-layout-flex\">\n<p><strong>Q2: \u5982\u4f55\u786e\u4fdd\u4e00\u4e2a\u5bf9\u8c61\u88ab\u5b8c\u5168\u4ece\u5185\u5b58\u4e2d\u79fb\u9664\uff1f<\/strong><\/p>\n\n\n\n<p><strong>A2:<\/strong> \u786e\u4fdd\u5bf9\u8c61\u4e0d\u518d\u88ab\u4efb\u4f55\u5f15\u7528\u6307\u5411\u662f\u7b2c\u4e00\u6b65\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5c06\u6240\u6709\u5f15\u7528\u8be5\u5bf9\u8c61\u7684\u53d8\u91cf\u8bbe\u7f6e\u4e3anull\u6765\u5b8c\u6210\u3002\u7136\u540e\uff0c\u4f60\u53ef\u4ee5\u8bf7\u6c42\u7cfb\u7edf\u8fd0\u884cGC\uff0c\u4f8b\u5982\u901a\u8fc7<code>System.gc()<\/code>\uff0c\u4f46\u8fd9\u53ea\u662f\u4e00\u4e2a\u5efa\u8bae\uff0cJava\u8fd0\u884c\u65f6\u4e0d\u4fdd\u8bc1\u7acb\u5373\u8fdb\u884c\u5783\u573e\u56de\u6536\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-layout-2 wp-block-group-is-layout-flex\">\n<p><strong>Q3: \u5982\u679c\u6211\u5fd8\u8bb0\u4ece\u5bb9\u5668\u4e2d\u5220\u9664\u4e0d\u518d\u9700\u8981\u7684\u5bf9\u8c61\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/strong><\/p>\n\n\n\n<p><strong>A3:<\/strong> \u5982\u679c\u4e0d\u518d\u9700\u8981\u7684\u5bf9\u8c61\u6ca1\u6709\u4ece\u5bb9\u5668\u4e2d\u5220\u9664\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\uff0c\u5c24\u5176\u662f\u5728\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u5e94\u7528\u4e2d\u3002\u5373\u4f7f\u5bf9\u8c61\u4e0d\u518d\u88ab\u4f7f\u7528\uff0c\u5b83\u4ecd\u7136\u5360\u7528\u5185\u5b58\uff0c\u56e0\u4e3a\u5bb9\u5668\u4ecd\u7136\u6301\u6709\u5bf9\u5b83\u7684\u5f15\u7528\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u5b9a\u671f\u68c0\u67e5\u548c\u6e05\u7406\u5bb9\u5668\u4e2d\u7684\u5185\u5bb9\u662f\u5f88\u91cd\u8981\u7684\u3002<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-layout-3 wp-block-group-is-layout-flex\">\n<p><strong>Q4: 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