{"id":1527,"date":"2020-12-27T12:15:45","date_gmt":"2020-12-27T04:15:45","guid":{"rendered":"https:\/\/www.specialwu.com\/?p=1527"},"modified":"2021-04-13T18:02:54","modified_gmt":"2021-04-13T10:02:54","slug":"java%e4%b8%ad%e8%a2%ab%e9%97%ae%e7%9a%84%e7%bf%bb%e6%9d%a5%e8%a6%86%e5%8e%bb%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/www.specialwu.com\/?p=1527","title":{"rendered":"Java\u4e2d\u88ab\u95ee\u7684\u7ffb\u6765\u8986\u53bb\u7684\u77e5\u8bc6\u70b9"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_61 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span 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ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#java%E8%99%9A%E6%8B%9F%E6%9C%BA%E9%83%A8%E5%88%86\" title=\"java\u865a\u62df\u673a\u90e8\u5206\">java\u865a\u62df\u673a\u90e8\u5206<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6%E7%AE%97%E6%B3%95\" title=\"\u5783\u573e\u56de\u6536\u7b97\u6cd5\">\u5783\u573e\u56de\u6536\u7b97\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#JVM\" title=\"JVM\">JVM<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E6%9C%AC%E5%9C%B0%E6%96%B9%E6%B3%95%E6%A0%88\" 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title=\"\u6570\u7ec4\u548c\u94fe\u8868\u5206\u522b\u6bd4\u8f83\u9002\u5408\u7528\u4e8e\u4ec0\u4e48\u573a\u666f\uff0c\u4e3a\u4ec0\u4e48\uff1f\">\u6570\u7ec4\u548c\u94fe\u8868\u5206\u522b\u6bd4\u8f83\u9002\u5408\u7528\u4e8e\u4ec0\u4e48\u573a\u666f\uff0c\u4e3a\u4ec0\u4e48\uff1f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#list%E7%9B%B8%E5%85%B3\" title=\"list\u76f8\u5173\">list\u76f8\u5173<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#ArrayList_%E5%92%8C_Linkedlist_%E5%8C%BA%E5%88%AB\" title=\"ArrayList \u548c Linkedlist \u533a\u522b\">ArrayList \u548c Linkedlist \u533a\u522b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#List_anew_ArrayList%E5%92%8C_ArrayList_a_new_ArrayList%E7%9A%84%E5%8C%BA%E5%88%AB\" title=\"List a=new ArrayList()\u548c ArrayList a =new ArrayList()\u7684\u533a\u522b\">List a=new ArrayList()\u548c ArrayList a =new ArrayList()\u7684\u533a\u522b<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E5%A4%9A%E7%BA%BF%E7%A8%8B\" title=\"\u591a\u7ebf\u7a0b\">\u591a\u7ebf\u7a0b<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E5%A4%9A%E7%BA%BF%E7%A8%8B%E5%AE%9E%E7%8E%B0%E6%96%B9%E5%BC%8F\" title=\"\u591a\u7ebf\u7a0b\u5b9e\u73b0\u65b9\u5f0f\">\u591a\u7ebf\u7a0b\u5b9e\u73b0\u65b9\u5f0f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E7%BA%BF%E7%A8%8B%E4%BA%92%E6%96%A5%E4%B8%8E%E5%90%8C%E6%AD%A5\" title=\"\u7ebf\u7a0b\u4e92\u65a5\u4e0e\u540c\u6b65\">\u7ebf\u7a0b\u4e92\u65a5\u4e0e\u540c\u6b65<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E5%B9%B6%E5%8F%91%E9%98%9F%E5%88%97-%E9%98%BB%E5%A1%9E%E9%98%9F%E5%88%97\" title=\"\u5e76\u53d1\u961f\u5217-\u963b\u585e\u961f\u5217\">\u5e76\u53d1\u961f\u5217-\u963b\u585e\u961f\u5217<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#BlockingQueue_%E9%98%BB%E5%A1%9E%E9%98%9F%E5%88%97\" title=\"BlockingQueue \u963b\u585e\u961f\u5217\">BlockingQueue \u963b\u585e\u961f\u5217<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E7%BA%BF%E7%A8%8B%E6%B1%A0\" title=\"\u7ebf\u7a0b\u6c60\">\u7ebf\u7a0b\u6c60<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"http:\/\/www.specialwu.com\/?p=1527\/#%E7%BD%91%E7%BB%9C%E9%80%9A%E4%BF%A1\" title=\"\u7f51\u7edc\u901a\u4fe1\">\u7f51\u7edc\u901a\u4fe1<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"java%E8%99%9A%E6%8B%9F%E6%9C%BA%E9%83%A8%E5%88%86\"><\/span>java\u865a\u62df\u673a\u90e8\u5206<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6%E7%AE%97%E6%B3%95\"><\/span>\u5783\u573e\u56de\u6536\u7b97\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>GC\u6548\u7387<br \/>\n\u5185\u5b58\u6548\u7387\uff1a\u590d\u5236\u7b97\u6cd5>\u6807\u8bb0\u538b\u7f29\u7b97\u6cd5<br \/>\n\u5185\u5b58\u6574\u9f50\u5ea6\uff1a\u590d\u5236\u7b97\u6cd5=\u6807\u8bb0\u538b\u7f29\u7b97\u6cd5<br \/>\n\u5185\u5b58\u5229\u7528\u7387\uff1a\u6807\u8bb0\u538b\u7f29=\u6807\u8bb0\u6e05\u695a\u7b97\u6cd5<br \/>\n&#8211; 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\/>\n\u4e00\u662f\u91c7\u7528\u8fd9\u79cd\u65b9\u6cd5\u540e\uff0c\u6bcf\u6b21\u5728\u589e\u52a0\u53d8\u91cf\u5f15\u7528\u548c\u51cf\u5c11\u5f15\u7528\u65f6\u90fd\u8981\u8fdb\u884c\u52a0\u6cd5\u6216\u51cf\u6cd5\u64cd\u4f5c\uff0c\u5982\u679c\u9891\u7e41\u64cd\u4f5c\u5bf9\u8c61\u7684\u8bdd\uff0c\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u589e\u52a0\u7684\u7cfb\u7edf\u7684\u6d88\u8017\u3002<br \/>\n\u4e8c\u662f\u8fd9\u79cd\u65b9\u6cd5\u65e0\u6cd5\u5904\u7406\u5faa\u73af\u5f15\u7528\u7684\u60c5\u51b5\u3002\u518d\u89e3\u91ca\u4e0b\u4ec0\u4e48\u662f\u5faa\u73af\u5f15\u7528\uff0c\u5047\u8bbe\u6709\u4e24\u4e2a\u5bf9\u8c61 A\u548cB\uff0cA\u4e2d\u5f15\u7528\u4e86B\u5bf9\u8c61\uff0c\u5e76\u4e14B\u4e2d\u4e5f\u5f15\u7528\u4e86A\u5bf9\u8c61\uff0c<br \/>\n\u90a3\u4e48\u8fd9\u65f6\u4e24\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\u8ba1\u6570\u5668\u90fd\u4e0d\u4e3a0\uff0c\u4f46\u662f\u7531\u4e8e\u5b58\u5728\u76f8\u4e92\u5f15\u7528\u5bfc\u81f4\u65e0\u6cd5\u5783\u573e\u56de\u6536A\u548c B\uff0c\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n<ul>\n<li>\u7b97\u6cd5\u4e8c\uff1a\u6807\u8bb0\u6e05\u9664\u6cd5<\/li>\n<\/ul>\n<p>\u8fd9\u4e2a\u65b9\u6cd5\u662f\u5c06\u5783\u573e\u56de\u6536\u5206\u6210\u4e86\u4e24\u4e2a\u9636\u6bb5\uff1a\u6807\u8bb0\u9636\u6bb5\u548c\u6e05\u9664\u9636\u6bb5\u3002<br \/>\n\u5728\u6807\u8bb0\u9636\u6bb5\uff0c\u901a\u8fc7\u8ddf\u5bf9\u8c61\uff0c\u6807\u8bb0\u6240\u6709\u4ece\u8ddf\u8282\u70b9\u5f00\u59cb\u7684\u53ef\u8fbe\u7684\u5bf9\u8c61\uff0c\u90a3\u4e48\u672a\u6807\u8bb0\u7684\u5bf9\u8c61\u5c31\u662f\u672a\u88ab\u5f15\u7528\u7684\u5783\u573e\u5bf9\u8c61\u3002<br \/>\n\u5728\u6e05\u9664\u9636\u6bb5\uff0c\u6e05\u9664\u6389\u6240\u4ee5\u7684\u672a\u88ab\u6807\u8bb0\u7684\u5bf9\u8c61\u3002<br \/>\n\u8fd9\u4e2a\u65b9\u6cd5\u7684\u7f3a\u70b9\u662f\uff0c\u5783\u573e\u56de\u6536\u540e\u53ef\u80fd\u5b58\u5728\u5927\u91cf\u7684\u78c1\u76d8\u788e\u7247\uff0c\u51c6\u786e\u7684\u8bf4\u662f\u5185\u5b58\u788e\u7247\u3002\u56e0\u4e3a\u5bf9\u8c61\u6240\u5360\u7528\u7684\u5730\u5740\u7a7a\u95f4\u662f\u56fa\u5b9a\u7684\u3002\u5bf9\u4e8e\u8fd9\u4e2a\u7b97\u6cd5\u8fd8\u6709\u6539\u8fdb\u7684\u7b97\u6cd5\uff0c\u5c31\u662f\u6211\u540e\u9762\u8981\u8bf4\u7684\u7b97\u6cd5\u4e09\u3002<\/p>\n<ul>\n<li>\u7b97\u6cd5\u4e09\uff1a\u6807\u8bb0\u538b\u7f29\u6e05\u9664\u6cd5\uff08Java\u4e2d\u8001\u5e74\u4ee3\u91c7\u7528\uff09\u3002<\/li>\n<\/ul>\n<p>\u5728\u7b97\u6cd5\u4e8c\u7684\u57fa\u7840\u4e0a\u505a\u4e86\u4e00\u4e2a\u6539\u8fdb\uff0c\u53ef\u4ee5\u8bf4\u8fd9\u4e2a\u7b97\u6cd5\u5206\u4e3a\u4e09\u4e2a\u9636\u6bb5\uff1a\u6807\u8bb0\u9636\u6bb5\uff0c\u538b\u7f29\u9636\u6bb5\uff0c\u6e05\u9664\u9636\u6bb5\u3002\u6807\u8bb0\u9636\u6bb5\u548c\u6e05\u9664\u9636\u6bb5\u4e0d\u53d8\uff0c\u53ea\u4e0d\u8fc7\u589e\u52a0\u4e86\u4e00\u4e2a\u538b\u7f29\u9636\u6bb5\uff0c\u5c31\u662f\u5728\u505a\u5b8c\u6807\u8bb0\u9636\u6bb5\u540e\uff0c\u5c06\u8fd9\u4e9b\u6807\u8bb0\u8fc7\u7684\u5bf9\u8c61\u96c6\u4e2d\u653e\u5230\u4e00\u8d77\uff0c\u786e\u5b9a\u5f00\u59cb\u548c\u7ed3\u675f\u5730\u5740\uff0c\u6bd4\u5982\u5168\u90e8\u653e\u5230\u5f00\u59cb\u5904\uff0c\u8fd9\u6837\u518d\u53bb\u6e05\u9664\uff0c\u5c06\u4e0d\u4f1a\u4ea7\u751f\u78c1\u76d8\u788e\u7247\u3002\u4f46\u662f\u6211\u4eec\u4e5f\u8981\u6ce8\u610f\u5230\u51e0\u4e2a\u95ee\u9898\uff0c\u538b\u7f29\u9636\u6bb5\u5360\u7528\u4e86\u7cfb\u7edf\u7684\u6d88\u8017\uff0c\u5e76\u4e14\u5982\u679c\u6807\u8bb0\u5bf9\u8c61\u8fc7\u591a\u7684\u8bdd\uff0c\u635f\u8017\u53ef\u80fd\u4f1a\u5f88\u5927\uff0c\u5728\u6807\u8bb0\u5bf9\u8c61\u76f8\u5bf9\u8f83\u5c11\u7684\u65f6\u5019\uff0c\u6548\u7387\u8f83\u9ad8\u3002<\/p>\n<ul>\n<li>\u7b97\u6cd5\u56db\uff1a\u590d\u5236\u7b97\u6cd5\uff08Java\u4e2d\u65b0\u751f\u4ee3\u91c7\u7528\uff09\u3002<\/li>\n<\/ul>\n<p>\u6838\u5fc3\u601d\u60f3\u662f\u5c06\u5185\u5b58\u7a7a\u95f4\u5206\u6210\u4e24\u5757\uff0c\u540c\u4e00\u65f6\u523b\u53ea\u4f7f\u7528\u5176\u4e2d\u7684\u4e00\u5757\uff0c\u5728\u5783\u573e\u56de\u6536\u65f6\u5c06\u6b63\u5728\u4f7f\u7528\u7684\u5185\u5b58\u4e2d\u7684\u5b58\u6d3b\u7684\u5bf9\u8c61\u590d\u5236\u5230\u672a\u4f7f\u7528\u7684\u5185\u5b58\u4e2d\uff0c\u7136\u540e\u6e05\u9664\u6b63\u5728\u4f7f\u7528\u7684\u5185\u5b58\u5757\u4e2d\u6240\u6709\u7684\u5bf9\u8c61\uff0c\u7136\u540e\u628a\u672a\u4f7f\u7528\u7684\u5185\u5b58\u5757\u53d8\u6210\u6b63\u5728\u4f7f\u7528\u7684\u5185\u5b58\u5757\uff0c\u628a\u539f\u6765\u4f7f\u7528\u7684\u5185\u5b58\u5757\u53d8\u6210\u672a\u4f7f\u7528\u7684\u5185\u5b58\u5757\u3002\u5f88\u660e\u663e\u5982\u679c\u5b58\u6d3b\u5bf9\u8c61\u8f83\u591a\u7684\u8bdd\uff0c\u7b97\u6cd5\u6548\u7387\u4f1a\u6bd4\u8f83\u5dee\uff0c\u5e76\u4e14\u8fd9\u6837\u4f1a\u4f7f\u5185\u5b58\u7684\u7a7a\u95f4\u6298\u534a\uff0c\u4f46\u662f\u8fd9\u79cd\u65b9\u6cd5\u4e5f\u4e0d\u4f1a\u4ea7\u751f\u5185\u5b58\u788e\u7247\u3002<\/p>\n<ul>\n<li>\u7b97\u6cd5\u4e94\uff1a\u5206\u4ee3\u6cd5\uff08Java\u5806\u91c7\u7528\uff09\u3002<\/li>\n<\/ul>\n<p>\u4e3b\u8981\u601d\u60f3\u662f\u6839\u636e\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u957f\u77ed\u7279\u70b9\u5c06\u5176\u8fdb\u884c\u5206\u5757\uff0c\u6839\u636e\u6bcf\u5757\u5185\u5b58\u533a\u95f4\u7684\u7279\u70b9\uff0c\u4f7f\u7528\u4e0d\u540c\u7684\u56de\u6536\u7b97\u6cd5\uff0c\u4ece\u800c\u63d0\u9ad8\u5783\u573e\u56de\u6536\u7684\u6548\u7387\u3002<br \/>\n\u6bd4\u5982Java\u865a\u62df\u673a\u4e2d\u7684\u5806\u5c31\u91c7\u7528\u4e86\u8fd9\u79cd\u65b9\u6cd5\u5206\u6210\u4e86\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u3002\u7136\u540e\u5bf9\u4e8e\u4e0d\u540c\u7684\u4ee3\u91c7\u7528\u4e0d\u540c\u7684\u5783\u573e\u56de\u6536\u7b97\u6cd5\u3002<br \/>\n\u65b0\u751f\u4ee3\u4f7f\u7528\u4e86\u590d\u5236\u7b97\u6cd5\uff0c\u8001\u5e74\u4ee3\u4f7f\u7528\u4e86\u6807\u8bb0\u538b\u7f29\u6e05\u9664\u7b97\u6cd5\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"JVM\"><\/span>JVM<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img src=\"https:\/\/www.specialwu.com\/wp-content\/uploads\/2020\/12\/JVM.png\" alt=\"\" \/><\/p>\n<blockquote><p>\n  \u7c7b\u52a0\u8f7d\u8fc7\u7a0b\u4e0e\u53cc\u4eb2\u59d4\u6d3e\u673a\u5236\n<\/p><\/blockquote>\n<pre><code class=\"language-java line-numbers\">\/\/Bootstrap classLoader:\u4e3b\u8981\u8d1f\u8d23\u52a0\u8f7d\u6838\u5fc3\u7684\u7c7b\u5e93(java.lang.*\u7b49)\uff0c\u6784\u9020ExtClassLoader\u548cAPPClassLoader\u3002\n\n\/\/ExtClassLoader\uff1a\u4e3b\u8981\u8d1f\u8d23\u52a0\u8f7djre\/lib\/ext\u76ee\u5f55\u4e0b\u7684\u4e00\u4e9b\u6269\u5c55\u7684jar\u3002\n\n\/\/AppClassLoader\uff1a\u4e3b\u8981\u8d1f\u8d23\u52a0\u8f7d\u5e94\u7528\u7a0b\u5e8f\u7684\u4e3b\u51fd\u6570\u7c7b\npublic static void main(String[] args) {\n        Test0106 test0106 = new Test0106();\n        System.out.println(test0106.getClass());\n        System.out.println(test0106.getClass().getClassLoader());\n        System.out.println(test0106.getClass().getClassLoader().getParent());\n        System.out.println(test0106.getClass().getClassLoader().getParent().getParent());\n    }\nclass javapra.Test0106\nsun.misc.Launcher<span class=\"katex math inline\">AppClassLoader@18b4aac2\nsun.misc.Launcher<\/span>ExtClassLoader@2280cdac\nnull\n<\/code><\/pre>\n<p>0.\u5f53\u4e00\u4e2aTest0106.class\u8fd9\u6837\u7684\u6587\u4ef6\u8981\u88ab\u52a0\u8f7d\u65f6\u3002\u4e0d\u8003\u8651\u6211\u4eec\u81ea\u5b9a\u4e49\u7c7b\u52a0\u8f7d\u5668<br \/>\n1.\u7c7b\u52a0\u8f7d\u5668\u6536\u5230\u7c7b\u52a0\u8f7d\u8bf7\u6c42\uff1b<br \/>\n2.\u5c06\u8fd9\u4e2a\u8bf7\u6c42\u5411\u4e0a\u59d4\u6258\u7236\u7c7b\u52a0\u8f7d\u5668\u5b8c\u6210\uff0c\u4e00\u76f4\u5411\u4e0a\u59d4\u6258\u76f4\u5230\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff1b<br \/>\n3.\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u68c0\u67e5\u662f\u5426\u80fd\u591f\u52a0\u8f7d\u5f53\u524d\u8fd9\u4e2a\u7c7b\uff0c\u80fd\u52a0\u8f7d\u5c31\u7ed3\u675f\uff0c\u4f7f\u7528\u5f53\u524d\u7684\u52a0\u8f7d\u5668\uff0c\u5426\u5219\u629b\u51fa\u5f02\u5e38\uff0c\u901a\u77e5\u5b50\u7c7b\u52a0\u8f7d\u5668\u8fdb\u884c\u52a0\u8f7d\uff1b<br \/>\n4.\u91cd\u590d\u7b2c\u4e09\u6b65<br \/>\n\u5982\u679c\u52a0\u8f7d\u4e0d\u5230\u8fd9\u4e2a\u7c7b\u5219class not found<\/p>\n<ul>\n<li>\u4e3a\u4ec0\u4e48\u8981\u6709\u8fd9\u79cd\u8bbe\u8ba1<\/li>\n<\/ul>\n<p>\u5982\u679c\u6709\u4eba\u60f3\u66ff\u6362\u7cfb\u7edf\u7ea7\u522b\u7684\u7c7b\uff1aString.java\u3002\u7be1\u6539\u5b83\u7684\u5b9e\u73b0\uff0c\u5728\u8fd9\u79cd\u673a\u5236\u4e0b\u8fd9\u4e9b\u7cfb\u7edf\u7684\u7c7b\u5df2\u7ecf\u88abBootstrap classLoader\u52a0\u8f7d\u8fc7\u4e86<\/p>\n<hr \/>\n<blockquote><p>\n  \u5806\u6ea2\u51fa\u4e0e\u6808\u6ea2\u51fa\n<\/p><\/blockquote>\n<p>\u6808\uff1a\u5148\u8fdb\u540e\u51fa\uff1b\u6808\u5185\u5b58\u4e3b\u7ba1\u7a0b\u5e8f\u8fd0\u884c\uff0c\u751f\u547d\u5468\u671f\uff0c\u7ebf\u7a0b\u540c\u6b65\uff0c\u7ebf\u7a0b\u7ed3\u675f\uff0c\u6808\u5185\u5b58\u91ca\u653e\uff0c\u4e00\u4e2a\u65b9\u6cd5\u5c31\u662f\u4e00\u4e2a\u6808\u5e27\uff0c\u6808\u4e2d\u5b58\u653e\u516b\u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b+\u5bf9\u8c61\u5f15\u7528+\u5b9e\u4f8b\u7684\u65b9\u6cd5\uff1b\u5982\u679c\u7ebf\u7a0b\u8bf7\u6c42\u7684\u6808\u6df1\u5ea6\u5927\u4e8e\u865a\u62df\u673a\u6240\u5141\u8bb8\u7684\u6df1\u5ea6\uff0c\u5c06\u629b\u51fa<code>StackOverflowError\u00a0\u5f02\u5e38<\/code><\/p>\n<pre><code class=\"language-java line-numbers\">public static void main(String[] args) {\n        a();\n    }\n    public static void a(){\n        b();\n    }\n    public static void b(){\n        a();\n    }\nException in thread \"main\" java.lang.StackOverflowError\n    at javapra.Test0106.a(Test0106.java:14)\n    at javapra.Test0106.b(Test0106.java:17)\n<\/code><\/pre>\n<p>\u5806\u5185\u5b58\u6ea2\u51fa\uff1a\u5f53\u6269\u5c55\u65f6\u65e0\u6cd5\u7533\u8bf7\u5230\u8db3\u591f\u7684\u5185\u5b58\u65f6\u4f1a\u629b\u51fa<code>OutOfMemoryError\u00a0\u5f02\u5e38<\/code><\/p>\n<pre><code class=\"language-java line-numbers\"> static class OOMObject {\n    }\n\n    public static void main(String[] args) throws InterruptedException {\n        List&lt;OOMObject&gt; list = new ArrayList&lt;&gt;();\n\n        while(true) {\n\/\/            TimeUnit.MILLISECONDS.sleep(1);\n            list.add(new OOMObject());\n        }\n    }\n<\/code><\/pre>\n<blockquote><p>\n  \u4e00\u4e2a\u5bf9\u8c61\u5728\u5185\u5b58\u4e2d\u7684\u5b9e\u4f8b\u5316\u8fc7\u7a0b\n<\/p><\/blockquote>\n<pre><code class=\"language-java line-numbers\">public class Test0106{\n    String name; \/\/ \u5b9a\u4e49\u4e00\u4e2a\u6210\u5458\u53d8\u91cf name\n    int age; \/\/ \u6210\u5458\u53d8\u91cf age\n    void sing(){\n        System.out.println(\"\u4eba\u7684\u59d3\u540d\uff1a\"+name);\n        System.out.println(\"\u4eba\u7684\u5e74\u9f84\uff1a\"+age);\n    }\n\n    public static void main(String[] args) {\n        String name; \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf name\n        int age; \/\/ \u5c40\u90e8\u53d8\u91cf age\n\n        Test0106 people = new Test0106() ; \/\/\u5b9e\u4f8b\u5316\u5bf9\u8c61people\n        people.name = \"\u5f20\u4e09\" ;       \/\/\u8d4b\u503c\n        people.age = 18;             \/\/\u8d4b\u503c\n        people.sing();              \/\/\u8c03\u7528\u65b9\u6cd5sing\n    }\n}\n<\/code><\/pre>\n<p>1.\u7c7b\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u548c\u65b9\u6cd5\u4f53\u4f1a\u8fdb\u5165\u5230<code>\u65b9\u6cd5\u533a<\/code><br \/>\n2.\u7a0b\u5e8f\u6267\u884c\u5230 main() \u65b9\u6cd5\u65f6\uff0cmain()\u51fd\u6570\u65b9\u6cd5\u4f53\u4f1a<code>\u8fdb\u5165\u6808\u533a<\/code>\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u53eb\u505a\u8fdb\u6808(\u538b\u6808)\uff0c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7528\u4e8e\u6307\u5411 Person \u5b9e\u4f8b\u7684\u53d8\u91cf person<br \/>\n3.\u7a0b\u5e8f\u6267\u884c\u5230 Person person = new Person(); \u5c31\u4f1a\u5728<code>\u5806\u5185\u5b58<\/code>\u5f00\u8f9f\u4e00\u5757\u5185\u5b58\u533a\u95f4\uff0c\u7528\u4e8e\u5b58\u653e Person \u5b9e\u4f8b\u5bf9\u8c61\uff0c\u7136\u540e\u5c06\u6210\u5458\u53d8\u91cf\u548c\u6210\u5458\u65b9\u6cd5\u653e\u5728 new \u5b9e\u4f8b\u4e2d\u90fd\u662f\u53d6\u6210\u5458\u53d8\u91cf\u548c\u6210\u5458\u65b9\u6cd5\u7684\u5730\u5740\u503c<br \/>\n4.\u5bf9 person \u5bf9\u8c61\u8fdb\u884c\u8d4b\u503c\uff0c person.name = \u201c\u5f20\u4e09\u201d ; person.age = 18;\u5148\u5728\u6808\u533a\u627e\u5230 person\uff0c\u7136\u540e\u6839\u636e\u5730\u5740\u503c\u627e\u5230 new Person() \u8fdb\u884c\u8d4b\u503c\u64cd\u4f5c<br \/>\n5.\u5f53\u7a0b\u5e8f\u8d70\u5230 sing() \u65b9\u6cd5\u65f6\uff0c\u5148\u5230\u6808\u533a\u627e\u5230 person\u8fd9\u4e2a\u5f15\u7528\u53d8\u91cf\uff0c\u7136\u540e\u6839\u636e\u8be5\u5730\u5740\u503c\u5728\u5806\u5185\u5b58\u4e2d\u627e\u5230 new Person() \u8fdb\u884c\u65b9\u6cd5\u8c03\u7528\uff1b<br \/>\n6.\u5728\u65b9\u6cd5\u4f53void sing()\u88ab\u8c03\u7528\u5b8c\u6210\u540e\uff0c\u5c31\u4f1a\u7acb\u523b\u9a6c\u4e0a\u4ece\u6808\u5185\u5f39\u51fa\uff08\u51fa\u6808 )\uff0c\u6700\u540e\uff0c\u5728main()\u51fd\u6570\u5b8c\u6210\u540e\uff0cmain()\u51fd\u6570\u4e5f\u4f1a\u51fa\u6808<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%9C%AC%E5%9C%B0%E6%96%B9%E6%B3%95%E6%A0%88\"><\/span>\u672c\u5730\u65b9\u6cd5\u6808<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5e26native\u5173\u952e\u5b57\u7684\u8bf4\u660eJava\u4f5c\u7528\u8303\u56f4\u65e0\u6cd5\u8fbe\u5230\uff0c\u9700\u8981\u8c03\u7528\u5e95\u5c42C\u8bed\u8a00\uff0c\u90a3\u4e48\u5c31\u4f1a\u8c03\u7528\u672c\u5730\u65b9\u6cd5\u63a5\u53e3JNI\uff0c\u4ece\u800c\u8c03\u7528\u672c\u5730\u65b9\u6cd5\u5e93\u4e2d\u7684\u65b9\u6cd5;\u672c\u5730\u65b9\u6cd5\u63a5\u53e3\u7684\u4f5c\u7528\u5c31\u662f\u62d3\u5c55Java\u4ee3\u7801\uff0c\u878d\u5408\u4e0d\u540c\u7684\u7f16\u7a0b\u8bed\u8a00\u3002<\/p>\n<pre><code class=\"language-java line-numbers\">public class Test0106 {\n    public static void main(String[] args) {\n        new Thread(()-&gt;{},\"mystread\").start();\n         new Thread().start();\n    }\n    private native void start0();\n    }\n<\/code><\/pre>\n<p>start\u65b9\u6cd5\u6e90\u7801<\/p>\n<pre><code class=\"language-java line-numbers\">public synchronized void start() {\n        if (threadStatus != 0)\n            throw new IllegalThreadStateException();\n        group.add(this);\n        boolean started = false;\n        try {\n            start0();\n            started = true;\n        } finally {\n            try {\n                if (!started) {\n                    group.threadStartFailed(this);\n                }\n            } catch (Throwable ignore) {\n                \/* do nothing. If start0 threw a Throwable then\n                  it will be passed up the call stack *\/\n            }\n        }\n    }\n\n    private native void start0();\n<\/code><\/pre>\n<blockquote><p>\n  OOM\u89e3\u51b3\u65b9\u6848<br \/>\n  \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff1a\u5206\u914d\u7684\u603b\u5185\u5b58\u662f\u7535\u8111\u5185\u5b58\u7684\u56db\u5206\u4e4b\u4e00\uff0c\u521d\u59cb\u5316\u5185\u5b58\u4e3a\u7535\u8111\u5185\u5b58\u7684\u516d\u5341\u56db\u5206\u4e4b\u4e00\n<\/p><\/blockquote>\n<pre><code class=\"language-java line-numbers\">public static void main(String[] args){\n        \/\/jvm\u8bd5\u56fe\u4f7f\u7528\u6700\u5927\u7684\u5185\u5b58\n        long max = Runtime.getRuntime().maxMemory();\n        \/\/\u8fd4\u56deJVM\u521d\u59cb\u5316\u603b\u5185\u5b58\n        long total = Runtime.getRuntime().totalMemory();\n        System.out.println(max\/(double)1024\/2024+\"MB\");\n        System.out.println(total\/(double)1024\/2024+\"MB\");\n    }\n1371.8260869565217MB\n93.0909090909091MB\n<\/code><\/pre>\n<ul>\n<li>\u5982\u4f55\u6539\u53d8\u5206\u914d\u7684\u5185\u5b58\u5927\u5c0f<\/li>\n<\/ul>\n<pre><code class=\"language-java line-numbers\">\u521d\u59cb\u5806\u5927\u5c0f1024MB  \u6700\u5927\u5806\u5927\u5c0f1024MB   \u6253\u5370GC\u4fe1\u606f\n-Xms1024m        Xmx1024m          -XX:+PrintGCDetails\n\n496.5691699604743MB\n496.5691699604743MB\nHeap\n PSYoungGen      total 305664K, used 26214K [0x00000000eab00000, 0x0000000100000000, 0x0000000100000000)\n  eden space 262144K, 10% used [0x00000000eab00000,0x00000000ec499bc0,0x00000000fab00000)\n  from space 43520K, 0% used [0x00000000fd580000,0x00000000fd580000,0x0000000100000000)\n  to   space 43520K, 0% used [0x00000000fab00000,0x00000000fab00000,0x00000000fd580000)\n ParOldGen       total 699392K, used 0K [0x00000000c0000000, 0x00000000eab00000, 0x00000000eab00000)\n  object space 699392K, 0% used [0x00000000c0000000,0x00000000c0000000,0x00000000eab00000)\n Metaspace       used 3552K, capacity 4496K, committed 4864K, reserved 1056768K\n  class space    used 381K, capacity 388K, committed 512K, reserved 1048576K\n<\/code><\/pre>\n<p>\u5b9a\u4f4d\u5177\u4f53\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u4ee3\u7801\u4f4d\u7f6e\u53ef\u4f7f\u7528JPofiler<\/p>\n<ol>\n<li>\u7a0b\u5e8f\u8ba1\u6570\u5668<\/li>\n<\/ol>\n<p>\u7a0b\u5e8f\u8ba1\u6570\u5668\uff08Program Counter Register\uff09\u662f\u4e00\u5757\u8f83\u5c0f\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5b83\u7684\u4f5c\u7528\u53ef\u4ee5\u770b\u505a\u662f\u5f53\u524d\u7ebf\u7a0b\u6240\u6267\u884c\u7684\u5b57\u8282\u7801\u7684\u884c\u53f7\u6307\u793a\u5668\u3002<code>\u5b57\u8282\u7801\u89e3\u91ca\u5668\u5de5\u4f5c\u65f6\u5c31\u662f\u901a\u8fc7\u6539\u53d8\u8fd9\u4e2a\u8ba1\u6570\u5668\u7684\u503c\u6765\u9009\u53d6\u4e0b\u4e00\u6761\u9700\u8981\u6267\u884c\u7684\u5b57\u8282\u7801\u6307\u4ee4<\/code>\uff0c\u5206\u652f\u3001\u5faa\u73af\u3001\u8df3\u8f6c\u3001\u5f02\u5e38\u5904\u7406\u3001\u7ebf\u7a0b\u6062\u590d\u7b49\u57fa\u7840\u529f\u80fd\u90fd\u9700\u8981\u4f9d\u8d56\u8fd9\u4e2a\u8ba1\u6570\u5668\u6765\u5b8c\u6210\u3002<br \/>\n\u7531\u4e8eJava\u00a0\u865a\u62df\u673a\u7684\u591a\u7ebf\u7a0b\u662f\u901a\u8fc7\u7ebf\u7a0b\u8f6e\u6d41\u5207\u6362\u5e76\u5206\u914d\u5904\u7406\u5668\u6267\u884c\u65f6\u95f4\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u7684\uff0c\u5728\u4efb\u4f55\u4e00\u4e2a\u786e\u5b9a\u7684\u65f6\u523b\uff0c\u4e00\u4e2a\u5904\u7406\u5668\uff08\u5bf9\u4e8e\u591a\u6838\u5904\u7406\u5668\u6765\u8bf4\u662f\u4e00\u4e2a\u5185\u6838\uff09\u53ea\u4f1a\u6267\u884c\u4e00\u6761\u7ebf\u7a0b\u4e2d\u7684\u6307\u4ee4\u3002\u56e0\u6b64\uff0c<code>\u4e3a\u4e86\u7ebf\u7a0b\u5207\u6362\u540e\u80fd\u6062\u590d\u5230\u6b63\u786e\u7684\u6267\u884c\u4f4d\u7f6e<\/code>\uff0c\u6bcf\u6761\u7ebf\u7a0b\u90fd\u9700\u8981\u6709\u4e00\u4e2a\u72ec\u7acb\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\uff0c\u5404\u6761\u7ebf\u7a0b\u4e4b\u95f4\u7684\u8ba1\u6570\u5668\u4e92\u4e0d\u5f71\u54cd\uff0c\u72ec\u7acb\u5b58\u50a8\uff0c\u6211\u4eec\u79f0\u8fd9\u7c7b\u5185\u5b58\u533a\u57df\u4e3a\u201c\u7ebf\u7a0b\u79c1\u6709\u201d\u7684\u5185\u5b58\u3002<br \/>\n\u5982\u679c\u7ebf\u7a0b\u6b63\u5728\u6267\u884c\u7684\u662f\u4e00\u4e2aJava\u00a0\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u8ba1\u6570\u5668\u8bb0\u5f55\u7684\u662f\u6b63\u5728\u6267\u884c\u7684\u865a\u62df\u673a\u5b57\u8282\u7801\u6307\u4ee4\u7684\u5730\u5740\uff1b\u5982\u679c\u6b63\u5728\u6267\u884c\u7684\u662fNatvie\u00a0\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u8ba1\u6570\u5668\u503c\u5219\u4e3a\u7a7a\uff08Undefined\uff09\u3002\u6b64\u5185\u5b58\u533a\u57df\u662f\u552f\u4e00\u4e00\u4e2a\u5728Java\u00a0\u865a\u62df\u673a\u89c4\u8303\u4e2d\u6ca1\u6709\u89c4\u5b9a\u4efb\u4f55OutOfMemoryError\u00a0\u60c5\u51b5\u7684\u533a\u57df\u3002<\/p>\n<ol start=\"2\">\n<li>Java\u00a0\u865a\u62df\u673a\u6808<\/li>\n<\/ol>\n<p>\u4e0e\u7a0b\u5e8f\u8ba1\u6570\u5668\u4e00\u6837\uff0cJava\u00a0\u865a\u62df\u673a\u6808\uff08Java Virtual Machine Stacks\uff09\u4e5f\u662f\u7ebf\u7a0b\u79c1\u6709\u7684\uff0c\u5b83\u7684\u751f\u547d\u5468\u671f\u4e0e\u7ebf\u7a0b\u76f8\u540c\u3002<br \/>\n\u865a\u62df\u673a\u6808\u63cf\u8ff0\u7684\u662fJava\u00a0\u65b9\u6cd5\u6267\u884c\u7684\u5185\u5b58\u6a21\u578b\uff1a\u6bcf\u4e2a\u65b9\u6cd5\u88ab\u6267\u884c\u7684\u65f6\u5019\u90fd\u4f1a\u540c\u65f6\u521b\u5efa\u4e00\u4e2a<code>\u6808\u5e27<\/code>\uff08Stack Frame\u00a0\u2460\uff09<code>\u7528\u4e8e\u5b58\u50a8\u5c40\u90e8\u53d8\u91cf\u8868\u3001\u64cd\u4f5c\u6808\u3001\u52a8\u6001\u94fe\u63a5\u3001\u65b9\u6cd5\u51fa\u53e3<\/code>\u7b49\u4fe1\u606f\u3002<br \/>\n\u6bcf\u4e00\u4e2a\u65b9\u6cd5\u88ab\u8c03\u7528\u76f4\u81f3\u6267\u884c\u5b8c\u6210\u7684\u8fc7\u7a0b\uff0c\u5c31\u5bf9\u5e94\u7740\u4e00\u4e2a\u6808\u5e27\u5728\u865a\u62df\u673a\u6808\u4e2d\u4ece\u5165\u6808\u5230\u51fa\u6808\u7684\u8fc7\u7a0b\u3002\u7ecf\u5e38\u6709\u4eba\u628aJava\u00a0\u5185\u5b58\u533a\u5206\u4e3a\u5806\u5185\u5b58\uff08Heap\uff09\u548c\u6808\u5185\u5b58\uff08Stack\uff09\uff0c\u8fd9\u79cd\u5206\u6cd5\u6bd4\u8f83\u7c97\u7cd9\uff0cJava\u00a0\u5185\u5b58\u533a\u57df\u7684\u5212\u5206\u5b9e\u9645\u4e0a\u8fdc\u6bd4\u8fd9\u590d\u6742\u3002\u8fd9\u79cd\u5212\u5206\u65b9\u5f0f\u7684\u6d41\u884c\u53ea\u80fd\u8bf4\u660e\u5927\u591a\u6570\u7a0b\u5e8f\u5458\u6700\u5173\u6ce8\u7684\u3001\u4e0e\u5bf9\u8c61\u5185\u5b58\u5206\u914d\u5173\u7cfb\u6700\u5bc6\u5207\u7684\u5185\u5b58\u533a\u57df\u662f\u8fd9\u4e24\u5757\u3002\u800c\u6240\u6307\u7684\u201c\u6808\u201d\u5c31\u662f\u73b0\u5728\u8bb2\u7684\u865a\u62df\u673a\u6808\uff0c\u6216\u8005\u8bf4\u662f\u865a\u62df\u673a\u6808\u4e2d\u7684\u5c40\u90e8\u53d8\u91cf\u8868\u90e8\u5206\u3002<br \/>\n<code>\u5c40\u90e8\u53d8\u91cf\u8868<\/code>\u5b58\u653e\u4e86\u7f16\u8bd1\u671f\u53ef\u77e5\u7684\u5404\u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff08boolean\u3001byte\u3001char\u3001short\u3001int\u3001float\u3001long\u3001double\uff09\u3001\u5bf9\u8c61\u5f15\u7528\uff08reference\u00a0\u7c7b\u578b\uff0c\u5b83\u4e0d\u7b49\u540c\u4e8e\u5bf9\u8c61\u672c\u8eab\uff0c\u6839\u636e\u4e0d\u540c\u7684\u865a\u62df\u673a\u5b9e\u73b0\uff0c\u5b83\u53ef\u80fd\u662f\u4e00\u4e2a\u6307\u5411\u5bf9\u8c61\u8d77\u59cb\u5730\u5740\u7684\u5f15\u7528\u6307\u9488\uff0c\u4e5f\u53ef\u80fd\u6307\u5411\u4e00\u4e2a\u4ee3\u8868\u5bf9\u8c61\u7684\u53e5\u67c4\u6216\u8005\u5176\u4ed6\u4e0e\u6b64\u5bf9\u8c61\u76f8\u5173\u7684\u4f4d\u7f6e\uff09\u548creturnAddress\u00a0\u7c7b\u578b\uff08\u6307\u5411\u4e86\u4e00\u6761\u5b57\u8282\u7801\u6307\u4ee4\u7684\u5730\u5740\uff09\u3002<br \/>\n\u5176\u4e2d64\u00a0\u4f4d\u957f\u5ea6\u7684long\u00a0\u548cdouble\u00a0\u7c7b\u578b\u7684\u6570\u636e\u4f1a\u5360\u75282\u00a0\u4e2a\u5c40\u90e8\u53d8\u91cf\u7a7a\u95f4\uff08Slot\uff09\uff0c\u5176\u4f59\u7684\u6570\u636e\u7c7b\u578b\u53ea\u5360\u75281\u00a0\u4e2a\u3002\u5c40\u90e8\u53d8\u91cf\u8868\u6240\u9700\u7684\u5185\u5b58\u7a7a\u95f4\u5728\u7f16\u8bd1\u671f\u95f4\u5b8c\u6210\u5206\u914d\uff0c\u5f53\u8fdb\u5165\u4e00\u4e2a\u65b9\u6cd5\u65f6\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u9700\u8981\u5728\u5e27\u4e2d\u5206\u914d\u591a\u5927\u7684\u5c40\u90e8\u53d8\u91cf\u7a7a\u95f4\u662f\u5b8c\u5168\u786e\u5b9a\u7684\uff0c\u5728\u65b9\u6cd5\u8fd0\u884c\u671f\u95f4\u4e0d\u4f1a\u6539\u53d8\u5c40\u90e8\u53d8\u91cf\u8868\u7684\u5927\u5c0f\u3002\u5728Java\u00a0\u865a\u62df\u673a\u89c4\u8303\u4e2d\uff0c\u5bf9\u8fd9\u4e2a\u533a\u57df\u89c4\u5b9a\u4e86\u4e24\u79cd\u5f02\u5e38\u72b6\u51b5\uff1a\u5982\u679c\u7ebf\u7a0b\u8bf7\u6c42\u7684\u6808\u6df1\u5ea6\u5927\u4e8e\u865a\u62df\u673a\u6240\u5141\u8bb8\u7684\u6df1\u5ea6\uff0c\u5c06\u629b\u51fa<code>StackOverflowError\u00a0\u5f02\u5e38<\/code>\uff1b\u5982\u679c\u865a\u62df\u673a\u6808\u53ef\u4ee5\u52a8\u6001\u6269\u5c55\uff08\u5f53\u524d\u5927\u90e8\u5206\u7684Java\u00a0\u865a\u62df\u673a\u90fd\u53ef\u52a8\u6001\u6269\u5c55\uff0c\u53ea\u4e0d\u8fc7Java\u00a0\u865a\u62df\u673a\u89c4\u8303\u4e2d\u4e5f\u5141\u8bb8\u56fa\u5b9a\u957f\u5ea6\u7684\u865a\u62df\u673a\u6808\uff09\uff0c\u5f53\u6269\u5c55\u65f6\u65e0\u6cd5\u7533\u8bf7\u5230\u8db3\u591f\u7684\u5185\u5b58\u65f6\u4f1a\u629b\u51fa<code>OutOfMemoryError\u00a0\u5f02\u5e38<\/code>\u3002<\/p>\n<ol start=\"3\">\n<li>Java\u00a0\u5806<\/li>\n<\/ol>\n<p>\u5bf9\u4e8e\u5927\u591a\u6570\u5e94\u7528\u6765\u8bf4\uff0cJava\u00a0\u5806\uff08Java Heap\uff09\u662fJava\u00a0\u865a\u62df\u673a\u6240\u7ba1\u7406\u7684\u5185\u5b58\u4e2d\u6700\u5927\u7684<br \/>\n\u4e00\u5757\u3002Java\u00a0\u5806\u662f\u88ab\u6240\u6709<code>\u7ebf\u7a0b\u5171\u4eab\u7684\u4e00\u5757\u5185\u5b58\u533a\u57df<\/code>\uff0c\u5728\u865a\u62df\u673a\u542f\u52a8\u65f6\u521b\u5efa\u3002\u6b64\u5185\u5b58\u533a\u57df\u7684\u552f\u4e00\u76ee\u7684\u5c31\u662f<code>\u5b58\u653e\u5bf9\u8c61\u5b9e\u4f8b<\/code>\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u5bf9\u8c61\u5b9e\u4f8b\u90fd\u5728\u8fd9\u91cc\u5206\u914d\u5185\u5b58\u3002\u8fd9\u4e00\u70b9\u5728Java\u00a0\u865a\u62df\u673a\u89c4\u8303\u4e2d\u7684\u63cf\u8ff0\u662f\uff1a\u6240\u6709\u7684\u5bf9\u8c61\u5b9e\u4f8b\u4ee5\u53ca\u6570\u7ec4\u90fd\u8981\u5728\u5806\u4e0a\u5206\u914d\u2460\uff0c\u4f46\u662f\u968f\u7740JIT\u00a0\u7f16\u8bd1\u5668\u7684\u53d1\u5c55\u4e0e\u9003\u9038\u5206\u6790\u6280\u672f\u7684\u9010\u6e10\u6210\u719f\uff0c\u6808\u4e0a\u5206\u914d\u3001\u6807\u91cf\u66ff\u6362\u2461\u4f18\u5316\u6280\u672f\u5c06\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u5fae\u5999\u7684\u53d8\u5316\u53d1\u751f\uff0c\u6240\u6709\u7684\u5bf9\u8c61\u90fd\u5206\u914d\u5728\u5806\u4e0a\u4e5f\u6e10\u6e10\u53d8\u5f97\u4e0d\u662f\u90a3\u4e48\u201c\u7edd\u5bf9\u201d\u4e86\u3002<code>Java\u00a0\u5806\u662f\u5783\u573e\u6536\u96c6\u5668\u7ba1\u7406\u7684\u4e3b\u8981\u533a\u57df<\/code>\uff0c\u56e0\u6b64\u5f88\u591a\u65f6\u5019\u4e5f\u88ab\u79f0\u505a\u201cGC\u00a0\u5806\u201d\uff08GarbageCollected Heap\uff0c\u5e78\u597d\u56fd\u5185\u6ca1\u7ffb\u8bd1\u6210\u201c\u5783\u573e\u5806\u201d\uff09\u3002\u5982\u679c\u4ece\u5185\u5b58\u56de\u6536\u7684\u89d2\u5ea6\u770b\uff0c\u7531\u4e8e\u73b0\u5728\u6536\u96c6\u5668\u57fa\u672c\u90fd\u662f\u91c7\u7528\u7684\u5206\u4ee3\u6536\u96c6\u7b97\u6cd5\uff0c\u6240\u4ee5Java\u00a0\u5806\u4e2d\u8fd8\u53ef\u4ee5\u7ec6\u5206\u4e3a\uff1a\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\uff1b\u518d\u7ec6\u81f4\u4e00\u70b9\u7684\u6709Eden\u00a0\u7a7a\u95f4\u3001From Survivor\u00a0\u7a7a\u95f4\u3001To Survivor\u00a0\u7a7a\u95f4\u7b49\u3002\u5982\u679c\u4ece\u5185\u5b58\u5206\u914d\u7684\u89d2\u5ea6\u770b\uff0c\u7ebf\u7a0b\u5171\u4eab\u7684Java\u00a0\u5806\u4e2d\u53ef\u80fd\u5212\u5206\u51fa\u591a\u4e2a\u7ebf\u7a0b\u79c1\u6709\u7684\u5206\u914d\u7f13\u51b2\u533a\uff08Thread LocalAllocation Buffer\uff0cTLAB\uff09\u3002\u4e0d\u8fc7\uff0c\u65e0\u8bba\u5982\u4f55\u5212\u5206\uff0c\u90fd\u4e0e\u5b58\u653e\u5185\u5bb9\u65e0\u5173\uff0c\u65e0\u8bba\u54ea\u4e2a\u533a\u57df\uff0c\u5b58\u50a8\u7684\u90fd\u4ecd\u7136\u662f\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u8fdb\u4e00\u6b65\u5212\u5206\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u66f4\u597d\u5730\u56de\u6536\u5185\u5b58\uff0c\u6216\u8005\u66f4\u5feb\u5730\u5206\u914d\u5185\u5b58\u3002<br \/>\n\u6839\u636eJava\u00a0\u865a\u62df\u673a\u89c4\u8303\u7684\u89c4\u5b9a\uff0cJava\u00a0\u5806\u53ef\u4ee5\u5904\u4e8e\u7269\u7406\u4e0a\u4e0d\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\u4e2d\uff0c\u53ea\u8981\u903b\u8f91\u4e0a\u662f\u8fde\u7eed\u7684\u5373\u53ef\uff0c\u5c31\u50cf\u6211\u4eec\u7684\u78c1\u76d8\u7a7a\u95f4\u4e00\u6837\u3002\u5728\u5b9e\u73b0\u65f6\uff0c\u65e2\u53ef\u4ee5\u5b9e\u73b0\u6210\u56fa\u5b9a\u5927\u5c0f\u7684\uff0c\u4e5f\u53ef\u4ee5\u662f\u53ef\u6269\u5c55\u7684\uff0c\u4e0d\u8fc7\u5f53\u524d\u4e3b\u6d41\u7684\u865a\u62df\u673a\u90fd\u662f\u6309\u7167\u53ef\u6269\u5c55\u6765\u5b9e\u73b0\u7684\uff08\u901a\u8fc7-Xmx\u548c-Xms\u00a0\u63a7\u5236\uff09\u3002\u5982\u679c\u5728\u5806\u4e2d\u6ca1\u6709\u5185\u5b58\u5b8c\u6210\u5b9e\u4f8b\u5206\u914d\uff0c\u5e76\u4e14\u5806\u4e5f\u65e0\u6cd5\u518d\u6269\u5c55\u65f6\uff0c\u5c06\u4f1a\u629b\u51faOutOfMemoryError\u00a0\u5f02\u5e38\u3002<\/p>\n<ol start=\"4\">\n<li>\u65b9\u6cd5\u533a<\/li>\n<\/ol>\n<p>\u65b9\u6cd5\u533a\uff08Method Area\uff09\u4e0eJava\u00a0\u5806\u4e00\u6837\uff0c\u662f<code>\u5404\u4e2a\u7ebf\u7a0b\u5171\u4eab\u7684\u5185\u5b58\u533a\u57df<\/code>\uff0c\u5b83\u7528\u4e8e\u5b58\u50a8\u5df2\u88ab\u865a\u62df\u673a\u52a0\u8f7d\u7684<code>\u7c7b\u4fe1\u606f\u3001\u5e38\u91cf\u3001\u9759\u6001\u53d8\u91cf\u3001\u5373\u65f6\u7f16\u8bd1\u5668\u7f16\u8bd1\u540e\u7684\u4ee3\u7801\u7b49\u6570\u636e<\/code>\u3002\u867d\u7136Java\u00a0\u865a\u62df\u673a\u89c4\u8303\u628a\u65b9\u6cd5\u533a\u63cf\u8ff0\u4e3a\u5806\u7684\u4e00\u4e2a\u903b\u8f91\u90e8\u5206\uff0c\u4f46\u662f\u5b83\u5374\u6709\u4e00\u4e2a\u522b\u540d\u53eb\u505aNon-Heap\uff08\u975e\u5806\uff09\uff0c\u76ee\u7684\u5e94\u8be5\u662f\u4e0eJava\u00a0\u5806\u533a\u5206\u5f00\u6765\u3002\u5bf9\u4e8e\u4e60\u60ef\u5728HotSpot\u00a0\u865a\u62df\u673a\u4e0a\u5f00\u53d1\u548c\u90e8\u7f72\u7a0b\u5e8f\u7684\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u5f88\u591a\u4eba\u613f\u610f\u628a\u65b9\u6cd5\u533a\u79f0\u4e3a\u201c\u6c38\u4e45\u4ee3\u201d\uff08Permanent Generation\uff09\uff0c\u672c\u8d28\u4e0a\u4e24\u8005\u5e76\u4e0d\u7b49\u4ef7\uff0c\u4ec5\u4ec5\u662f\u56e0\u4e3aHotSpot\u00a0\u865a\u62df\u673a\u7684\u8bbe\u8ba1\u56e2\u961f\u9009\u62e9\u628aGC\u00a0\u5206\u4ee3\u6536\u96c6\u6269\u5c55\u81f3\u65b9\u6cd5\u533a\uff0c\u6216\u8005\u8bf4\u4f7f\u7528\u6c38\u4e45\u4ee3\u6765\u5b9e\u73b0\u65b9\u6cd5\u533a\u800c<br \/>\n\u5df2\u3002\u5bf9\u4e8e\u5176\u4ed6\u865a\u62df\u673a\uff08\u5982BEA JRockit\u3001IBM J9\u00a0\u7b49\uff09\u6765\u8bf4\u662f\u4e0d\u5b58\u5728\u6c38\u4e45\u4ee3\u7684\u6982\u5ff5\u7684\u3002\u5373\u4f7f\u662fHotSpot\u00a0\u865a\u62df\u673a\u672c\u8eab\uff0c\u6839\u636e\u5b98\u65b9\u53d1\u5e03\u7684\u8def\u7ebf\u56fe\u4fe1\u606f\uff0c\u73b0\u5728\u4e5f\u6709\u653e\u5f03\u6c38\u4e45\u4ee3\u5e76\u201c\u642c\u5bb6\u201d\u81f3Native Memory\u00a0\u6765\u5b9e\u73b0\u65b9\u6cd5\u533a\u7684\u89c4\u5212\u4e86\u3002<br \/>\nJava\u00a0\u865a\u62df\u673a\u89c4\u8303\u5bf9\u8fd9\u4e2a\u533a\u57df\u7684\u9650\u5236\u975e\u5e38\u5bbd\u677e\uff0c\u9664\u4e86\u548cJava\u00a0\u5806\u4e00\u6837\u4e0d\u9700\u8981\u8fde\u7eed\u7684\u5185<br \/>\n\u5b58\u548c\u53ef\u4ee5\u9009\u62e9\u56fa\u5b9a\u5927\u5c0f\u6216\u8005\u53ef\u6269\u5c55\u5916\uff0c\u8fd8\u53ef\u4ee5\u9009\u62e9\u4e0d\u5b9e\u73b0\u5783\u573e\u6536\u96c6\u3002\u76f8\u5bf9\u800c\u8a00\uff0c\u5783\u573e\u6536\u96c6\u884c\u4e3a\u5728\u8fd9\u4e2a\u533a\u57df\u662f\u6bd4\u8f83\u5c11\u51fa\u73b0\u7684\uff0c\u4f46\u5e76\u975e\u6570\u636e\u8fdb\u5165\u4e86\u65b9\u6cd5\u533a\u5c31\u5982\u6c38\u4e45\u4ee3\u7684\u540d\u5b57\u4e00\u6837\u201c\u6c38\u4e45\u201d\u5b58\u5728\u4e86\u3002\u8fd9\u4e2a\u533a\u57df\u7684\u5185\u5b58\u56de\u6536\u76ee\u6807\u4e3b\u8981\u662f\u9488\u5bf9\u5e38\u91cf\u6c60\u7684\u56de\u6536\u548c\u5bf9\u7c7b\u578b\u7684\u5378\u8f7d\uff0c\u4e00\u822c\u6765\u8bf4\u8fd9\u4e2a\u533a\u57df\u7684\u56de\u6536\u201c\u6210\u7ee9\u201d\u6bd4\u8f83\u96be\u4ee5\u4ee4\u4eba\u6ee1\u610f\uff0c\u5c24\u5176\u662f\u7c7b\u578b\u7684\u5378\u8f7d\uff0c\u6761\u4ef6\u76f8\u5f53\u82db\u523b\uff0c\u4f46\u662f\u8fd9\u90e8\u5206\u533a\u57df\u7684\u56de\u6536\u786e\u5b9e\u662f\u6709\u5fc5\u8981\u7684\u3002\u5728Sun\u00a0\u516c\u53f8\u7684BUG\u00a0\u5217\u8868\u4e2d\uff0c\u66fe\u51fa\u73b0\u8fc7\u7684\u82e5\u5e72\u4e2a\u4e25\u91cd\u7684BUG\u00a0\u5c31\u662f\u7531\u4e8e\u4f4e\u7248\u672c\u7684HotSpot\u00a0\u865a\u62df\u673a\u5bf9\u6b64\u533a\u57df\u672a\u5b8c\u5168\u56de\u6536\u800c\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<br \/>\n\u6839\u636eJava\u00a0\u865a\u62df\u673a\u89c4\u8303\u7684\u89c4\u5b9a\uff0c\u5f53\u65b9\u6cd5\u533a\u65e0\u6cd5\u6ee1\u8db3\u5185\u5b58\u5206\u914d\u9700\u6c42\u65f6\uff0c\u5c06\u629b\u51faOutOfMemoryError\u00a0\u5f02\u5e38\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"GC%E9%92%88%E5%AF%B9%E4%BB%80%E4%B9%88%E5%AF%B9%E8%B1%A1\"><\/span>GC\u9488\u5bf9\u4ec0\u4e48\u5bf9\u8c61<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-java line-numbers\">-Xms8m -Xmx8m -XX:+PrintGCDetails\n<\/code><\/pre>\n<p>\u67e5\u770bGC\u8fc7\u7a0b<\/p>\n<pre><code class=\"language-java line-numbers\">[GC (Allocation Failure) [PSYoungGen: 1536K-&gt;492K(2048K)] 1536K-&gt;836K(7680K), 0.0016970 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \n[GC (Allocation Failure) [PSYoungGen: 2010K-&gt;492K(2048K)] 2354K-&gt;1360K(7680K), 0.0116310 secs] [Times: user=0.03 sys=0.00, real=0.01 secs] \n[GC (Allocation Failure) [PSYoungGen: 2028K-&gt;504K(2048K)] 2896K-&gt;1862K(7680K), 0.0052206 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \n[GC (Allocation Failure) [PSYoungGen: 2040K-&gt;504K(2048K)] 3398K-&gt;2302K(7680K), 0.0011732 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \n[GC (Allocation Failure) [PSYoungGen: 2040K-&gt;504K(2048K)] 3838K-&gt;2874K(7680K), 0.0031236 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \n[GC (Allocation Failure) [PSYoungGen: 1729K-&gt;504K(2048K)] 4099K-&gt;3920K(7680K), 0.0141194 secs] [Times: user=0.05 sys=0.00, real=0.01 secs] \n[GC (Allocation Failure) [PSYoungGen: 1500K-&gt;512K(2048K)] 4916K-&gt;5322K(7680K), 0.0026002 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \n[Full GC (Ergonomics) [PSYoungGen: 512K-&gt;0K(2048K)] [ParOldGen: 4810K-&gt;4233K(5632K)] 5322K-&gt;4233K(7680K), [Metaspace: 3536K-&gt;3536K(1056768K)], 0.0684661 secs] [Times: user=0.23 sys=0.00, real=0.07 secs] \n[Full GC (Ergonomics) [PSYoungGen: 1536K-&gt;0K(2048K)] [ParOldGen: 5171K-&gt;5580K(5632K)] 6707K-&gt;5580K(7680K), [Metaspace: 3540K-&gt;3540K(1056768K)], 0.0521595 secs] [Times: user=0.16 sys=0.00, real=0.05 secs] \n[Full GC (Ergonomics) [PSYoungGen: 1196K-&gt;662K(2048K)] [ParOldGen: 5580K-&gt;5594K(5632K)] 6777K-&gt;6257K(7680K), [Metaspace: 3546K-&gt;3546K(1056768K)], 0.1232137 secs] [Times: user=0.37 sys=0.00, real=0.12 secs] \n[Full GC (Allocation Failure) [PSYoungGen: 662K-&gt;662K(2048K)] [ParOldGen: 5594K-&gt;5565K(5632K)] 6257K-&gt;6228K(7680K), [Metaspace: 3546K-&gt;3546K(1056768K)], 0.0961531 secs] [Times: user=0.19 sys=0.00, real=0.10 secs] \nHeap\n PSYoungGen      total 2048K, used 914K [0x00000000ffd80000, 0x0000000100000000, 0x0000000100000000)\n  eden space 1536K, 59% used [0x00000000ffd80000,0x00000000ffe64b30,0x00000000fff00000)\n  from space 512K, 0% used [0x00000000fff00000,0x00000000fff00000,0x00000000fff80000)\n  to   space 512K, 0% used [0x00000000fff80000,0x00000000fff80000,0x0000000100000000)\n ParOldGen       total 5632K, used 5565K [0x00000000ff800000, 0x00000000ffd80000, 0x00000000ffd80000)\n  object space 5632K, 98% used [0x00000000ff800000,0x00000000ffd6f5c8,0x00000000ffd80000)\n Metaspace       used 3709K, capacity 4540K, committed 4864K, reserved 1056768K\n  class space    used 396K, capacity 428K, committed 512K, reserved 1048576K\nException in thread \"main\" java.lang.OutOfMemoryError: Java heap space\n    at java.util.Arrays.copyOf(Arrays.java:3210)\n    at java.util.Arrays.copyOf(Arrays.java:3181)\n    at java.util.ArrayList.grow(ArrayList.java:265)\n    at java.util.ArrayList.ensureExplicitCapacity(ArrayList.java:239)\n    at java.util.ArrayList.ensureCapacityInternal(ArrayList.java:231)\n    at java.util.ArrayList.add(ArrayList.java:462)\n    at javapra.Test0106.main(Test0106.java:23)\n\n<\/code><\/pre>\n<p>\u5f53\u4e00\u4e2a\u5bf9\u8c61\u901a\u8fc7\u4e00\u7cfb\u5217\u6839\u5bf9\u8c61(\u6bd4\u5982\uff1a\u9759\u6001\u5c5e\u6027\u5f15\u7528\u7684\u5e38\u91cf)\u90fd\u4e0d\u53ef\u8fbe\u65f6\u5c31\u4f1a\u88ab\u56de\u6536\u3002\u7b80\u800c\u8a00\u4e4b\uff0c\u5f53\u4e00\u4e2a\u5bf9\u8c61\u7684\u6240\u6709\u5f15\u7528\u90fd\u4e3anull\u3002\u5faa\u73af\u4f9d\u8d56\u4e0d\u7b97\u505a\u5f15\u7528\uff0c\u5982\u679c\u5bf9\u8c61A\u6709\u4e00\u4e2a\u6307\u5411\u5bf9\u8c61B\u7684\u5f15\u7528\uff0c\u5bf9\u8c61B\u4e5f\u6709\u4e00\u4e2a\u6307\u5411\u5bf9\u8c61A\u7684\u5f15\u7528\uff0c\u9664\u6b64\u4e4b\u5916\uff0c\u5b83\u4eec\u6ca1\u6709\u5176\u4ed6\u5f15\u7528\uff0c\u90a3\u4e48\u5bf9\u8c61A\u548c\u5bf9\u8c61B\u90fd\u9700\u8981\u88ab\u56de\u6536<\/p>\n<h1><span class=\"ez-toc-section\" id=\"Java%E8%AF%AD%E6%B3%95\"><\/span>Java\u8bed\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<blockquote><p>\n  \u56db\u4e2a\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u6743\u9650\n<\/p><\/blockquote>\n<table>\n<thead>\n<tr>\n<th>\u8bbf\u95ee\u4fee\u9970\u7b26\\\u8bbf\u95ee\u6743\u9650<\/th>\n<th>\u540c\u4e00\u4e2a\u7c7b<\/th>\n<th>\u540c\u4e00\u4e2a\u5305<\/th>\n<th>\u5b50\u7c7b<\/th>\n<th>\u4e0d\u540c\u5305<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>public<\/td>\n<td>\u2714<\/td>\n<td>\u2714<\/td>\n<td>\u2714<\/td>\n<td>\u2714<\/td>\n<\/tr>\n<tr>\n<td>protected<\/td>\n<td>\u2714<\/td>\n<td>\u2714<\/td>\n<td>\u2714<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>default<\/td>\n<td>\u2714<\/td>\n<td>\u2714<\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>private<\/td>\n<td>\u2714<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote><p>\n  char \u578b\u53d8\u91cf\u4e2d\u80fd\u4e0d\u80fd\u5b58\u50a8\u4e00\u4e2a\u4e2d\u6587\u6c49\u5b57\uff0c\u4e3a\u4ec0\u4e48\n<\/p><\/blockquote>\n<p>\u53ef\u4ee5\u5b58\u50a8\uff0cchar\u5b58\u50a8\u5927\u5c0f2\u5b57\u828216\u4f4d<\/p>\n<blockquote><p>\n  \u62bd\u8c61\u7684(abstract)\u65b9\u6cd5\u662f\u5426\u53ef\u540c\u65f6\u662f\u9759\u6001\u7684(static), \u662f\u5426\u53ef\u540c\u65f6\u662f\u672c\u5730\u65b9\u6cd5 (native)\uff0c\u662f\u5426\u53ef\u540c\u65f6\u88ab synchronized\n<\/p><\/blockquote>\n<p>\u90fd\u4e0d\u80fd\u3002\u62bd\u8c61\u65b9\u6cd5\u9700\u8981\u5b50\u7c7b\u91cd\u5199\uff0c\u800c\u9759\u6001\u7684\u65b9\u6cd5\u662f\u65e0\u6cd5\u88ab\u91cd\u5199\u7684\uff0c\u56e0\u6b64\u4e8c\u8005\u662f\u77db\u76fe\u7684\u3002\u672c\u5730\u65b9\u6cd5\u662f\u7531 \u672c\u5730\u4ee3\u7801\uff08\u5982 C \u4ee3\u7801\uff09\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c\u800c\u62bd\u8c61\u65b9\u6cd5\u662f\u6ca1\u6709\u5b9e\u73b0\u7684\uff0c\u4e5f\u662f\u77db\u76fe\u7684\u3002synchronized \u548c\u65b9\u6cd5\u7684\u5b9e\u73b0\u7ec6\u8282\u6709\u5173\uff0c \u62bd\u8c61\u65b9\u6cd5\u4e0d\u6d89\u53ca\u5b9e\u73b0\u7ec6\u8282\uff0c\u56e0\u6b64\u4e5f\u662f\u76f8\u4e92\u77db\u76fe\u7684<\/p>\n<p>\u901a\u8fc7\u4e0b\u9762\u8fd9\u4ee3\u7801\u7406\u89e3\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3:\u95e8\u672c\u8eab\u6709\u5f00\u548c\u5173\u7684\u52a8\u4f5c\uff0c\u4f46\u4e0d\u4e00\u5b9a\u90fd\u5177\u5907\u6709\u54cd\u94c3\u7684\u529f\u80fd;\u62bd\u8c61\u7c7b\u662f\u5bf9\u4e00\u79cd\u4e8b\u7269\u7684\u62bd\u8c61\uff0c\u5373\u5bf9\u7c7b\u62bd\u8c61\uff0c\u800c\u63a5\u53e3\u662f\u5bf9\u884c\u4e3a\u7684\u62bd\u8c61\u3002<\/p>\n<pre><code class=\"language-java line-numbers\">interface Alram {\n    void alarm();\n}\n\nabstract class Door {\n    void open();\n    void close();\n}\n\nclass AlarmDoor extends Door implements Alarm {\n    void oepn() {\n    }\n    void close() {\n    }\n    void alarm() {\n    }\n}\n<\/code><\/pre>\n<p>1\uff09\u62bd\u8c61\u7c7b\u53ef\u4ee5\u63d0\u4f9b\u6210\u5458\u65b9\u6cd5\u7684\u5b9e\u73b0\u7ec6\u8282\uff0c\u800c\u63a5\u53e3\u4e2d\u53ea\u80fd\u5b58\u5728public abstract \u65b9\u6cd5\uff1b<\/p>\n<p>2\uff09\u62bd\u8c61\u7c7b\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u53ef\u4ee5\u662f\u5404\u79cd\u7c7b\u578b\u7684\uff0c\u800c\u63a5\u53e3\u4e2d\u7684\u6210\u5458\u53d8\u91cf\u53ea\u80fd\u662fpublic static final\u7c7b\u578b\u7684\uff1b<\/p>\n<p>3\uff09\u63a5\u53e3\u4e2d\u4e0d\u80fd\u542b\u6709\u9759\u6001\u4ee3\u7801\u5757\u4ee5\u53ca\u9759\u6001\u65b9\u6cd5\uff0c\u800c\u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u9759\u6001\u4ee3\u7801\u5757\u548c\u9759\u6001\u65b9\u6cd5\uff1b<\/p>\n<p>4\uff09\u4e00\u4e2a\u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff0c\u800c\u4e00\u4e2a\u7c7b\u5374\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\u3002<\/p>\n<blockquote><p>\n  <span class=\"text-highlighted-inline\" style=\"background-color: #fffd38;\">\u548cequals \u7684\u533a\u522b<\/span>\n<\/p><\/blockquote>\n<p>equals \u548c<span class=\"text-highlighted-inline\" style=\"background-color: #fffd38;\"> \u6700\u5927\u7684\u533a\u522b\u662f\u4e00\u4e2a\u662f\u65b9\u6cd5\u4e00\u4e2a\u662f\u8fd0\u7b97\u7b26\u3002 = =\u5982\u679c\u6bd4\u8f83\u7684\u5bf9\u8c61\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c\u5219\u6bd4\u8f83\u7684\u662f\u6570\u503c\u662f\u5426\u76f8\u7b49\uff1b\u5982\u679c\u6bd4\u8f83\u7684\u662f\u5f15\u7528\u6570\u636e\u7c7b\u578b\uff0c\u5219\u6bd4\u8f83\u7684\u662f\u5bf9\u8c61\u7684 \u5730\u5740\u503c\u662f\u5426\u76f8\u7b49\u3002 equals()\uff1a\u7528\u6765\u6bd4\u8f83\u65b9\u6cd5\u4e24\u4e2a\u5bf9\u8c61\u7684\u5185\u5bb9\u662f\u5426\u76f8\u7b49\u3002 \u6ce8\u610f\uff1aequals \u65b9\u6cd5\u4e0d\u80fd\u7528\u4e8e\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5982\u679c\u6ca1\u6709\u5bf9 equals \u65b9\u6cd5\u8fdb\u884c\u91cd\u5199\uff0c\u5219\u6bd4\u8f83\u7684\u662f\u5f15\u7528\u7c7b\u578b\u7684 \u53d8\u91cf\u6240\u6307\u5411\u7684\u5bf9\u8c61\u7684\u5730\u5740\u3002<\/span><\/p>\n<blockquote><p>\n  String s = &#8220;Hello&#8221;;s = s + &#8221; world!&#8221;;\u8fd9\u4e24\u884c\u4ee3\u7801\u6267\u884c\u540e\uff0c\u539f\u59cb\u7684 String \u5bf9\u8c61\u4e2d\u7684\u5185\u5bb9\u5230\u5e95\u53d8\u4e86\u6ca1\u6709\uff1f\n<\/p><\/blockquote>\n<p>\u90a3\u4e48 s \u6240\u6307\u5411\u7684\u90a3\u4e2a\u5bf9\u8c61\u662f\u5426\u53d1\u751f\u4e86 \u6539\u53d8\u5462\uff1f \u7b54\u6848\u662f\u6ca1\u6709\u3002\u8fd9\u65f6\uff0cs \u4e0d\u6307\u5411\u539f\u6765\u90a3\u4e2a\u5bf9\u8c61\u4e86\uff0c\u800c\u6307\u5411\u4e86\u53e6\u4e00\u4e2a String \u5bf9\u8c61\uff0c\u5185\u5bb9\u4e3a&#8221;Hello world!&#8221;\uff0c\u539f\u6765 \u90a3\u4e2a\u5bf9\u8c61\u8fd8<br \/>\n\u5b58\u5728\u4e8e\u5185\u5b58\u4e4b\u4e2d\uff0c\u53ea\u662f s \u8fd9\u4e2a\u5f15\u7528\u53d8\u91cf\u4e0d\u518d\u6307\u5411\u5b83\u4e86\u3002<br \/>\n\u6211\u4eec\u8fd8\u53ef\u4ee5\u77e5\u9053\uff0c\u5982\u679c\u8981\u4f7f\u7528\u5185 \u5bb9\u76f8\u540c\u7684\u5b57\u7b26\u4e32\uff0c\u4e0d\u5fc5\u6bcf\u6b21\u90fd new \u4e00\u4e2a String\u3002\u4f8b\u5982\u6211\u4eec\u8981\u5728\u6784\u9020\u5668\u4e2d\u5bf9\u4e00\u4e2a\u540d\u53eb s \u7684 String \u5f15\u7528\u53d8\u91cf\u8fdb\u884c\u521d \u59cb\u5316\uff0c \u628a\u5b83\u8bbe\u7f6e\u4e3a\u521d\u59cb\u503c<\/p>\n<pre><code class=\"language-java line-numbers\">private static String s;\n    public static void main(String[] args) {\n        s=\"aaa\";\n        System.out.println(s);\n    }\n<\/code><\/pre>\n<p>\u4e0d\u53ef\u53d8\u7c7b\u6709\u4e00\u4e9b\u4f18\u70b9\uff0c\u6bd4\u5982\u56e0\u4e3a \u5b83\u7684\u5bf9\u8c61\u662f\u53ea\u8bfb\u7684\uff0c\u6240\u4ee5\u591a\u7ebf\u7a0b\u5e76\u53d1\u8bbf\u95ee\u4e5f\u4e0d\u4f1a\u6709\u4efb\u4f55\u95ee\u9898\u3002\u5f53\u7136\u4e5f\u6709\u4e00\u4e9b\u7f3a\u70b9\uff0c\u6bd4\u5982\u6bcf\u4e2a\u4e0d\u540c\u7684\u72b6\u6001\u90fd\u8981\u4e00\u4e2a\u5bf9\u8c61 \u6765\u4ee3\u8868\uff0c\u53ef\u80fd\u4f1a\u9020\u6210\u6027\u80fd\u4e0a\u7684\u95ee\u9898\u3002\u6240\u4ee5 Java \u6807\u51c6\u7c7b\u5e93\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u53ef\u53d8\u7248\u672c\uff0c\u5373 StringBuffer<\/p>\n<blockquote><p>\n  try catch finally \u6267\u884c\u8fc7\u7a0b\n<\/p><\/blockquote>\n<pre><code class=\"language-java line-numbers\">public static int getNum(){\n       try {\n           int a=1\/0;\n           System.out.println(\"aaaa\");\n           return 1;\n       }catch (Exception e){\n           System.out.println(\"vvvv\");\n           return 2;\n       }finally {\n           System.out.println(111);;\n       }\n    }\n---------\nvvvv\n111\n2\n<\/code><\/pre>\n<blockquote><p>\n  switch \u662f\u5426\u80fd\u4f5c\u7528\u5728 byte \u4e0a\uff0c\n<\/p><\/blockquote>\n<p>Java5 \u4ee5\u524d switch(expr)\u4e2d\uff0cexpr \u53ea\u80fd\u662f byte\u3001short\u3001char\u3001int\u3002\u4ece Java 5 \u5f00\u59cb\uff0cJava \u4e2d\u5f15\u5165\u4e86\u679a\u4e3e\u7c7b\u578b\uff0c expr \u4e5f\u53ef\u4ee5\u662f enum \u7c7b\u578b\u3002 \u4ece Java 7 \u5f00\u59cb\uff0cexpr \u8fd8\u53ef\u4ee5\u662f\u5b57\u7b26\u4e32\uff08String\uff09\uff0c\u4f46\u662f\u957f\u6574\u578b\uff08long\uff09\u5728\u76ee\u524d\u6240\u6709\u7684\u7248\u672c\u4e2d\u90fd\u662f\u4e0d\u53ef\u4ee5\u7684<\/p>\n<blockquote><p>\n  String \u3001StringBuilder \u3001StringBuffer \u7684\u533a\u522b\n<\/p><\/blockquote>\n<p>String\uff1a\u4e0d\u53ef\u53d8\u5b57\u7b26\u4e32\uff1b<br \/>\nStringBuffer\uff1a\u53ef\u53d8\u5b57\u7b26\u4e32\u3001\u6548\u7387\u4f4e\u3001\u7ebf\u7a0b\u5b89\u5168\uff1b<br \/>\nStringBuilder\uff1a\u53ef\u53d8\u5b57\u7b26\u5e8f\u5217\u3001\u6548\u7387\u9ad8\u3001\u7ebf\u7a0b\u4e0d\u5b89\u5168\uff1b<br \/>\n\u521d\u59cb\u5316\u4e0a\u7684\u533a\u522b\uff0cString\u53ef\u4ee5\u7a7a\u8d4b\u503c\uff0c\u540e\u8005\u4e0d\u884c\uff0c\u62a5\u9519<\/p>\n<blockquote><p>\n  short s1 = 1; s1 = s1 + 1; \u6709\u9519\u5417?short s1 = 1; s1 += 1 \u6709\u9519\u5417;\n<\/p><\/blockquote>\n<pre><code class=\"language-java line-numbers\">\u5bf9\u4e8e short s1 = 1; s1 = s1 + 1;\n\u7531\u4e8e 1 \u662f int \u7c7b\u578b\uff0c\u56e0\u6b64 s1+1 \u8fd0\u7b97\u7ed3\u679c\u4e5f \u662f int \u578b\uff0c \u9700\u8981\u5f3a\u5236\u8f6c\u6362\u7c7b\u578b\u624d\u80fd\u8d4b\u503c\u7ed9 short \u578b\u3002\n\u800c short s1 = 1; s1 += 1;\u53ef\u4ee5\u6b63\u786e\u7f16\u8bd1\uff0c\n\u56e0\u4e3a s1+= 1;\u76f8\u5f53\u4e8e s1 = (short)(s1 + 1);\u5176\u4e2d\u6709\u9690\u542b\u7684\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u3002\n<\/code><\/pre>\n<blockquote><p>\n  Integer \u7c7b\u578b\u7684\u6570\u503c\u6bd4\u8f83\u8f93\u51fa\u7684\u7ed3\u679c\u4e3a\n<\/p><\/blockquote>\n<pre><code class=\"language-java line-numbers\"> Integer s=111,s1=111,s2=150,s3=150;\n        System.out.println(s==s1);\n        System.out.println(s2==s3);\ntrue\nfalse\n<\/code><\/pre>\n<p>\u88c5\u7bb1\u7684\u672c\u8d28\u662f\u4ec0\u4e48\u5462\uff1f\u5f53\u6211\u4eec\u7ed9\u4e00\u4e2a Integer \u5bf9\u8c61\u8d4b\u4e00\u4e2a int \u503c\u7684\u65f6\u5019\uff0c\u4f1a\u8c03\u7528 Integer \u7c7b\u7684\u9759\u6001\u65b9\u6cd5 valueOf,\u67e5\u770b\u6e90\u7801<\/p>\n<pre><code class=\"language-java line-numbers\">public static Integer valueOf(int i) {\n        if (i &gt;= IntegerCache.low &amp;&amp; i &lt;= IntegerCache.high)\n            return IntegerCache.cache[i + (-IntegerCache.low)];\n        return new Integer(i);\n    }\n<\/code><\/pre>\n<blockquote><p>\n  \u4e3a\u4ec0\u4e48\u8981\u6709\u5c01\u88c5\u7c7b\n<\/p><\/blockquote>\n<p>\u662f\u4e3a\u4e86\u5728\u5404\u79cd\u7c7b\u578b\u95f4\u8f6c\u5316<\/p>\n<p>\u7b80\u5355\u7684\u8bf4\uff0c\u5982\u679c\u6574\u578b\u5b57\u9762\u91cf\u7684\u503c\u5728-128 \u5230 127 \u4e4b\u95f4\uff0c\u90a3\u4e48\u4e0d\u4f1a new \u65b0\u7684 Integer \u5bf9\u8c61\uff0c\u800c\u662f\u76f4\u63a5\u5f15\u7528\u5e38\u91cf \u6c60\u4e2d\u7684 Integer \u5bf9\u8c61<\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E9%9B%86%E5%90%88%E7%9B%B8%E5%85%B3%E7%9A%84%E7%9F%A5%E8%AF%86\"><\/span>\u96c6\u5408\u76f8\u5173\u7684\u77e5\u8bc6<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"List_%E7%9A%84%E4%B8%89%E4%B8%AA%E5%AD%90%E7%B1%BB%E7%9A%84%E7%89%B9%E7%82%B9List_%E5%92%8C_Map%E3%80%81Set_%E7%9A%84%E5%8C%BA%E5%88%AB\"><\/span>List \u7684\u4e09\u4e2a\u5b50\u7c7b\u7684\u7279\u70b9,List \u548c Map\u3001Set \u7684\u533a\u522b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><code>ArrayList<\/code> \u5e95\u5c42\u7ed3\u6784\u662f\u6570\u7ec4,\u5e95\u5c42\u67e5\u8be2\u5feb,\u589e\u5220\u6162\u3002 LinkedList \u5e95\u5c42\u7ed3\u6784\u662f\u94fe\u8868\u578b\u7684,\u589e\u5220\u5feb,\u67e5\u8be2\u6162\u3002 voctor \u5e95\u5c42\u7ed3\u6784\u662f\u6570\u7ec4 \u7ebf\u7a0b\u5b89\u5168\u7684,\u589e\u5220\u6162,\u67e5\u8be2\u6162<br \/>\nList \u548c Set \u662f\u5b58\u50a8\u5355\u5217\u6570\u636e\u7684\u96c6\u5408\uff0cMap \u662f\u5b58\u50a8\u952e\u548c\u503c\u8fd9\u6837\u7684\u53cc\u5217\u6570\u636e\u7684\u96c6\u5408\uff1bList \u4e2d\u5b58\u50a8\u7684\u6570\u636e\u662f\u6709\u987a\u5e8f\uff0c \u5e76\u4e14\u5141\u8bb8\u91cd\u590d\uff1bMap \u4e2d\u5b58\u50a8\u7684\u6570\u636e\u662f\u6ca1\u6709\u987a\u5e8f\u7684\uff0c\u5176\u952e\u662f\u4e0d\u80fd\u91cd\u590d\u7684\uff0c\u5b83\u7684\u503c\u662f\u53ef\u4ee5\u6709\u91cd\u590d\u7684\uff0cSet \u4e2d\u5b58\u50a8\u7684\u6570\u636e\u662f\u65e0 \u5e8f\u7684\uff0c\u4e14\u4e0d\u5141\u8bb8\u6709\u91cd\u590d\uff0c\u4f46\u5143\u7d20\u5728\u96c6\u5408\u4e2d\u7684\u4f4d\u7f6e\u7531\u5143\u7d20\u7684 hashcode \u51b3\u5b9a\uff0c\u4f4d\u7f6e\u662f\u56fa\u5b9a\u7684\uff08Set\u96c6\u5408\u6839\u636ehashcode\u6765\u8fdb\u884c\u6570\u636e\u7684\u5b58\u50a8\uff0c\u6240\u4ee5\u4f4d\u7f6e\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u662f\u4f4d\u7f6e\u4e0d\u662f\u7528\u6237\u53ef\u4ee5\u63a7\u5236\u7684\uff0c\u6240\u4ee5\u5bf9\u4e8e\u7528\u6237\u6765\u8bf4set\u4e2d\u7684\u5143\u7d20\u8fd8\u662f\u65e0\u5e8f\u7684\uff09\uff1b<br \/>\n<code>List \u63a5\u53e3<\/code>\u6709\u4e09\u4e2a\u5b9e\u73b0\u7c7b\uff08LinkedList\uff1a\u57fa\u4e8e\u94fe\u8868\u5b9e\u73b0\uff0c\u94fe\u8868\u5185\u5b58\u662f\u6563\u4e71\u7684\uff0c\u6bcf\u4e00\u4e2a\u5143\u7d20\u5b58\u50a8\u672c\u8eab\u5185\u5b58\u5730\u5740\u7684\u540c\u65f6\u8fd8 \u5b58\u50a8\u4e0b\u4e00\u4e2a\u5143\u7d20\u7684\u5730\u5740\u3002\u94fe\u8868\u589e\u5220\u5feb\uff0c\u67e5\u627e\u6162\uff1bArrayList\uff1a\u57fa\u4e8e\u6570\u7ec4\u5b9e\u73b0\uff0c\u975e\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u6548\u7387\u9ad8\uff0c\u4fbf\u4e8e\u7d22\u5f15\uff0c\u4f46\u4e0d\u4fbf \u4e8e\u63d2\u5165\u5220\u9664\uff1bVector\uff1a\u57fa\u4e8e\u6570\u7ec4\u5b9e\u73b0\uff0c\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u6548\u7387\u4f4e\uff09\u3002<br \/>\n<code>Map \u63a5\u53e3<\/code>\u6709\u4e09\u4e2a\u5b9e\u73b0\u7c7b\uff08HashMap\uff1a\u57fa\u4e8e hash \u8868\u7684 Map \u63a5\u53e3\u5b9e\u73b0\uff0c\u975e\u7ebf\u7a0b\u5b89\u5168\uff0c\u9ad8\u6548\uff0c\u652f\u6301 null \u503c\u548c null \u952e\uff1bHashTable\uff1a\u7ebf\u7a0b\u5b89\u5168\uff0c\u4f4e\u6548\uff0c\u4e0d\u652f\u6301 null \u503c\u548c null \u952e\uff1b\u4e24\u8005\u7684\u7684 key \u503c\u5747\u4e0d\u80fd\u91cd\u590d\uff0c\u82e5\u6dfb\u52a0 key \u76f8\u540c\u7684\u952e\u503c\u5bf9\uff0c\u540e\u9762\u7684 value \u4f1a\u81ea\u52a8\u8986\u76d6\u524d\u9762\u7684 value\uff0c\u4f46\u4e0d\u4f1a\u62a5\u9519LinkedHashMap\uff1a\u662f HashMap \u7684\u4e00\u4e2a\u5b50\u7c7b\uff0c\u4fdd\u5b58\u4e86 \u8bb0\u5f55\u7684\u63d2\u5165\u987a\u5e8f\uff1bSortMap \u63a5\u53e3\uff1aTreeMap\uff0c\u80fd\u591f\u628a\u5b83\u4fdd\u5b58\u7684\u8bb0\u5f55\u6839\u636e\u952e\u6392\u5e8f\uff0c\u9ed8\u8ba4\u662f\u952e\u503c\u7684\u5347\u5e8f\u6392\u5e8f\uff09\u3002<br \/>\n<code>Set \u63a5\u53e3<\/code>\u6709\u4e24\u4e2a\u5b9e\u73b0\u7c7b\uff08HashSet\uff1a\u5e95\u5c42\u662f\u7531 HashMap \u5b9e\u73b0\uff0c\u4e0d\u5141\u8bb8\u96c6\u5408\u4e2d\u6709\u91cd\u590d\u7684\u503c\uff0c\u4f7f\u7528\u8be5\u65b9\u5f0f\u65f6\u9700\u8981\u91cd\u5199 equals()\u548c hashCode()\u65b9\u6cd5\uff1bLinkedHashSet\uff1a\u7ee7\u627f\u4e0e HashSet\uff0c\u540c\u65f6\u53c8\u57fa\u4e8e LinkedHashMap \u6765\u8fdb\u884c\u5b9e\u73b0\uff0c\u5e95\u5c42\u4f7f \u7528\u7684\u662f LinkedHashMp\uff09\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E6%95%B0%E7%BB%84%E5%92%8C%E9%93%BE%E8%A1%A8%E5%88%86%E5%88%AB%E6%AF%94%E8%BE%83%E9%80%82%E5%90%88%E7%94%A8%E4%BA%8E%E4%BB%80%E4%B9%88%E5%9C%BA%E6%99%AF%EF%BC%8C%E4%B8%BA%E4%BB%80%E4%B9%88%EF%BC%9F\"><\/span>\u6570\u7ec4\u548c\u94fe\u8868\u5206\u522b\u6bd4\u8f83\u9002\u5408\u7528\u4e8e\u4ec0\u4e48\u573a\u666f\uff0c\u4e3a\u4ec0\u4e48\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>\u6982\u5ff5<\/li>\n<\/ul>\n<p>\u5f53\u5185\u5b58\u7a7a\u95f4\u4e2d\u6709\u8db3\u591f\u5927\u7684\u8fde\u7eed\u7a7a\u95f4\u65f6\uff0c\u53ef\u4ee5\u628a\u6570\u636e\u8fde\u7eed\u7684\u5b58\u653e\u5728\u5185\u5b58\u4e2d;<br \/>\n\u53e6\u5916\u4e00\u79cd\uff0c\u4e0d\u5f71\u54cd\u522b\u4eba\u7684\u6570\u636e\u5b58\u50a8\u65b9\u5f0f\u662f\u628a\u6570\u636e\u96c6\u4e2d\u7684\u6570\u636e\u5206\u5f00\u79bb\u6563\u5730\u5b58\u50a8\u5230\u8fd9\u4e9b\u4e0d\u8fde\u7eed\u7a7a\u95f4\u4e2d\uff0c\u8fd9\u65f6\u4e3a\u4e86\u80fd\u628a\u6570\u636e\u96c6\u4e2d\u7684\u6240\u6709\u6570\u636e\u8054\u7cfb\u8d77\u6765\uff0c\u9700\u8981\u5728\u524d\u4e00\u5757\u6570\u636e\u7684\u5b58\u50a8\u7a7a\u95f4\u4e2d\u8bb0\u5f55\u4e0b\u4e00\u5757\u6570\u636e\u7684\u5730\u5740\uff0c\u8fd9\u6837\u53ea\u8981\u77e5\u9053\u7b2c\u4e00 \u5757\u5185\u5b58\u7a7a\u95f4\u7684\u5730\u5740\u5c31\u80fd\u73af\u73af\u76f8\u6263\u5730\u628a\u6570\u636e\u96c6\u6574\u4f53\u8054\u7cfb\u5728\u4e00\u8d77\u4e86\u3002<br \/>\n\u56e0\u6b64\uff0c\u6570\u636e\u7684\u7269\u7406\u5b58\u50a8\u7ed3\u6784\u5c31\u6709\u8fde\u7eed\u5b58\u50a8\u548c\u79bb \u6563\u5b58\u50a8\u4e24\u79cd\uff0c\u5b83\u4eec\u5bf9\u5e94\u4e86\u6211\u4eec\u901a\u5e38\u6240\u8bf4\u7684\u6570\u7ec4\u548c\u94fe\u8868<\/p>\n<ul>\n<li>\u6570\u7ec4\u7684\u7279\u70b9<\/li>\n<\/ul>\n<p>\u6570\u7ec4\u662f\u5c06\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u8fde\u7eed\u5b58\u50a8\u7684\uff1b\u5b83\u7684\u4f18\u70b9\uff1a\u56e0\u4e3a\u6570\u636e\u662f\u8fde\u7eed\u5b58\u50a8\u7684\uff0c\u5185\u5b58\u5730\u5740\u8fde\u7eed\uff0c\u6240\u4ee5\u5728\u67e5\u627e\u6570\u636e\u7684\u65f6\u5019\u6548\u7387 \u6bd4\u8f83\u9ad8\uff1b\u5b83\u7684\u7f3a\u70b9\uff1a\u5728\u5b58\u50a8\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u7533\u8bf7\u4e00\u5757\u8fde\u7eed\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5e76\u4e14\u5728\u7f16\u8bd1\u7684\u65f6\u5019\u5c31\u5fc5\u987b\u786e\u5b9a\u597d\u5b83\u7684\u7a7a\u95f4\u7684\u5927\u5c0f\u3002\u5728\u8fd0 \u884c\u7684\u65f6\u5019\u7a7a\u95f4\u7684\u5927\u5c0f\u662f\u65e0\u6cd5\u968f\u7740\u4f60\u7684\u9700\u8981\u8fdb\u884c\u589e\u52a0\u548c\u51cf\u5c11\u800c\u6539\u53d8\u7684\uff0c\u5f53\u6570\u636e\u4e24\u6bd4\u8f83\u5927\u7684\u65f6\u5019\uff0c\u6709\u53ef\u80fd\u4f1a\u51fa\u73b0\u8d8a\u754c\u7684\u60c5\u51b5\uff0c\u6570\u636e \u6bd4\u8f83\u5c0f\u7684\u65f6\u5019\uff0c\u53c8\u6709\u53ef\u80fd\u4f1a\u6d6a\u8d39\u6389\u5185\u5b58\u7a7a\u95f4<\/p>\n<ul>\n<li>\u94fe\u8868\u7684\u7279\u70b9<\/li>\n<\/ul>\n<p>\u5728\u6539\u53d8\u6570\u636e\u4e2a\u6570\u65f6\uff0c\u589e\u52a0\u3001\u63d2\u5165\u3001\u5220\u9664\u6570\u636e\u6548\u7387\u6bd4\u8f83\u4f4e\u94fe\u8868\u662f\u52a8\u6001\u7533\u8bf7\u5185\u5b58\u7a7a\u95f4\uff0c \u4e0d\u9700\u8981\u50cf\u6570\u7ec4\u9700\u8981\u63d0\u524d\u7533\u8bf7\u597d\u5185\u5b58\u7684\u5927\u5c0f\uff0c\u94fe\u8868\u53ea\u9700\u5728\u7528\u7684\u65f6\u5019\u7533\u8bf7\u5c31\u53ef\u4ee5\uff0c\u6839\u636e\u9700 \u8981\u6765\u52a8\u6001\u7533\u8bf7\u6216\u8005\u5220\u9664\u5185\u5b58\u7a7a\u95f4\uff0c\u5bf9\u4e8e\u6570\u636e\u589e\u52a0\u548c\u5220\u9664\u4ee5\u53ca\u63d2\u5165\u6bd4\u6570\u7ec4\u7075\u6d3b\u3002\u8fd8\u6709\u5c31\u662f\u94fe\u8868\u4e2d\u6570\u636e\u5728\u5185\u5b58\u4e2d\u53ef\u4ee5\u5728\u4efb \u610f\u7684\u4f4d\u7f6e\uff0c\u901a\u8fc7\u5e94\u7528\u6765\u5173\u8054\u6570\u636e\uff08\u5c31\u662f\u901a\u8fc7\u5b58\u5728\u5143\u7d20\u7684\u6307\u9488\u6765\u8054\u7cfb\uff09<\/p>\n<ul>\n<li>\u7528\u9762\u5411\u5bf9\u8c61\u7684\u65b9\u6cd5\u6c42\u51fa\u6570\u7ec4\u4e2d\u91cd\u590d value \u7684\u4e2a\u6570<\/li>\n<\/ul>\n<pre><code class=\"language-java line-numbers\">public static void main(String[] args){\n        int[] arr = {1,4,1,4,2,5,4,5,8,7,8,77,88,5,4,9,6,2,4,1,5};\n        Map&lt;Integer, Integer&gt; map = new HashMap&lt;&gt;();\n        for (int value : arr) {\n            \/\/\/\/\u5224\u65ad\u662f\u5426\u5305\u542b\u6307\u5b9a\u7684\u952e\u503c\n            if (map.containsKey(value)) {\n                map.put(value, map.get(value) + 1);\n            } else {\n                map.put(value, 1);\n            }\n        }\n        for (Map.Entry&lt;Integer, Integer&gt; entry : map.entrySet()){\n            System.out.println(entry.getKey() + \"\u51fa\u73b0:\" + entry.getValue() + \"\u6b21\");\n        }\n    }\n<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"list%E7%9B%B8%E5%85%B3\"><\/span>list\u76f8\u5173<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"ArrayList_%E5%92%8C_Linkedlist_%E5%8C%BA%E5%88%AB\"><\/span>ArrayList \u548c Linkedlist \u533a\u522b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>ArrayList \u548c Vector \u4f7f\u7528\u4e86\u6570\u7ec4\u7684\u5b9e\u73b0\uff0c\u53ef\u4ee5\u8ba4\u4e3a ArrayList \u6216\u8005 Vector \u5c01\u88c5\u4e86\u5bf9\u5185\u90e8\u6570\u7ec4\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982 \u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\uff0c\u5220\u9664\uff0c\u63d2\u5165\u65b0\u7684\u5143\u7d20\u6216\u8005\u6570\u636e\u7684\u6269\u5c55\u548c\u91cd\u5b9a\u5411\u3002 LinkedList \u4f7f\u7528\u4e86\u5faa\u73af\u53cc\u5411\u94fe\u8868\u6570\u636e\u7ed3\u6784\u3002\u4e0e\u57fa\u4e8e\u6570\u7ec4\u7684 ArrayList \u76f8\u6bd4\uff0c\u8fd9\u662f\u4e24\u79cd\u622a\u7136\u4e0d\u540c\u7684\u5b9e\u73b0\u6280\u672f\uff0c\u8fd9\u4e5f \u51b3\u5b9a\u4e86\u5b83\u4eec\u5c06\u9002\u7528\u4e8e\u5b8c\u5168\u4e0d\u540c\u7684\u5de5\u4f5c\u573a\u666f\u3002 LinkedList \u94fe\u8868\u7531\u4e00\u7cfb\u5217\u8868\u9879\u8fde\u63a5\u800c\u6210\u3002\u4e00\u4e2a\u8868\u9879\u603b\u662f\u5305\u542b 3 \u4e2a\u90e8\u5206\uff1a\u5143\u7d20\u5185\u5bb9\uff0c\u524d\u9a71\u8868\u548c\u540e\u9a71\u8868\uff0c\u65e0\u8bba LikedList \u662f\u5426\u4e3a\u7a7a\uff0c\u94fe\u8868\u5185\u90e8\u90fd\u6709\u4e00\u4e2a header \u8868\u9879\uff0c\u5b83\u65e2\u8868\u793a\u94fe\u8868\u7684\u5f00\u59cb\uff0c\u4e5f\u8868\u793a\u94fe\u8868\u7684\u7ed3\u5c3e\u3002\u8868\u9879 header \u7684\u540e\u9a71\u8868\u9879\u4fbf\u662f \u94fe\u8868\u4e2d\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0c\u8868\u9879 header \u7684\u524d\u9a71\u8868\u9879\u4fbf\u662f\u94fe\u8868\u4e2d\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002<br \/>\n1. ArrayList \u662f\u5b9e\u73b0\u4e86\u57fa\u4e8e\u52a8\u6001\u6570\u7ec4\u7684\u6570\u636e\u7ed3\u6784\uff0cLinkedList \u57fa\u4e8e\u94fe\u8868\u7684\u6570\u636e\u7ed3\u6784\u3002<br \/>\n2. \u5982\u679c\u96c6\u5408\u6570\u636e\u662f\u5bf9\u4e8e\u96c6\u5408\u968f\u673a\u8bbf\u95ee get \u548c set\uff0cArrayList \u7edd\u5bf9\u4f18\u4e8e LinkedList\uff0c\u56e0\u4e3a LinkedList \u8981\u79fb\u52a8\u6307\u9488\u3002<br \/>\n3. \u5982\u679c\u96c6\u5408\u6570\u636e\u662f\u5bf9\u4e8e\u96c6\u5408\u65b0\u589e\u548c\u5220\u9664\u64cd\u4f5c add \u548c remove\uff0cLinedList \u6bd4\u8f83\u5360\u4f18\u52bf\uff0c\u56e0\u4e3a ArrayList \u8981\u79fb\u52a8\u6570 \u636e<\/p>\n<h4><span class=\"ez-toc-section\" id=\"List_anew_ArrayList%E5%92%8C_ArrayList_a_new_ArrayList%E7%9A%84%E5%8C%BA%E5%88%AB\"><\/span>List a=new ArrayList()\u548c ArrayList a =new ArrayList()\u7684\u533a\u522b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-java line-numbers\">        \/\/\u8fd9\u53e5\u521b\u5efa\u4e86\u4e00\u4e2a ArrayList \u7684\u5bf9\u8c61\u540e\u628a\u4e0a\u6eaf\u5230\u4e86 List\u3002\n        \/\/\u6b64\u65f6\u5b83\u662f\u4e00\u4e2a List \u5bf9 \u8c61\u4e86\uff0c\u6709\u4e9bArrayList \u6709\u4f46\u662f List \u6ca1\u6709\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5b83\u5c31\u4e0d\u80fd\u518d\u7528\u4e86\n        List list = new ArrayList();\n        \/\/\u521b\u5efa\u4e00\u5bf9\u8c61\u5219\u4fdd\u7559\u4e86ArrayList \u7684\u6240\u6709\u5c5e\u6027\u3002 \n        \/\/\u6240\u4ee5\u9700\u8981\u7528\u5230 ArrayList \u72ec\u6709\u7684\u65b9\u6cd5\u7684\u65f6\u5019\u4e0d\u80fd\u7528\u524d\u8005\u3002\n        ArrayList arl = new ArrayList();\n         \/\/ArrayList \u72ec\u6709\u7684\u65b9\u6cd5\n        arl.trimToSize();\n<\/code><\/pre>\n<h1><span class=\"ez-toc-section\" id=\"%E5%A4%9A%E7%BA%BF%E7%A8%8B\"><\/span>\u591a\u7ebf\u7a0b<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<blockquote><p>\n  \u7ebf\u7a0b\u548c\u8fdb\u7a0b\u7684\u533a\u522b\n<\/p><\/blockquote>\n<p><code>\u8fdb\u7a0b<\/code>\uff1a\u5177\u6709\u4e00\u5b9a\u72ec\u7acb\u529f\u80fd\u7684\u7a0b\u5e8f\u5173\u4e8e\u67d0\u4e2a\u6570\u636e\u96c6\u5408\u4e0a\u7684\u4e00\u6b21\u8fd0\u884c\u6d3b\u52a8\uff0c\u662f\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u8d44\u6e90\u5206\u914d\u548c\u8c03\u5ea6\u7684\u4e00\u4e2a\u72ec \u7acb\u5355\u4f4d\u3002<br \/>\n<code>\u7ebf\u7a0b<\/code>\uff1a\u662f\u8fdb\u7a0b\u7684\u4e00\u4e2a\u5b9e\u4f53\uff0c\u662f cpu \u8c03\u5ea6\u548c\u5206\u6d3e\u7684\u57fa\u672c\u5355\u4f4d\uff0c\u662f\u6bd4\u8fdb\u7a0b\u66f4\u5c0f\u7684\u53ef\u4ee5\u72ec\u7acb\u8fd0\u884c\u7684\u57fa\u672c\u5355\u4f4d\u3002 \u7279\u70b9\uff1a\u7ebf\u7a0b\u7684\u5212\u5206\u5c3a\u5ea6\u5c0f\u4e8e\u8fdb\u7a0b\uff0c\u8fd9\u4f7f\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u62e5\u6709\u9ad8\u5e76\u53d1\u6027\uff0c\u8fdb\u7a0b\u5728\u8fd0\u884c\u65f6\u5404\u81ea\u5185\u5b58\u5355\u5143\u76f8\u4e92\u72ec\u7acb\uff0c\u7ebf\u7a0b\u4e4b\u95f4\u5185\u5b58 \u5171\u4eab\uff0c\u8fd9\u4f7f\u591a\u7ebf\u7a0b\u7f16\u7a0b\u53ef\u4ee5\u62e5\u6709\u66f4\u597d\u7684\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c \u6ce8\u610f\uff1a\u591a\u7ebf\u7a0b\u7f16\u7a0b\u5bf9\u4e8e\u5176\u5b83\u7a0b\u5e8f\u662f\u4e0d\u53cb\u597d\u7684\uff0c\u5360\u636e\u5927\u91cf cpu \u8d44\u6e90\u3002<\/p>\n<blockquote><p>\n  \u8bf7\u8bf4\u51fa\u540c\u6b65\u7ebf\u7a0b\u53ca\u7ebf\u7a0b\u8c03\u5ea6\u76f8\u5173\u7684\u65b9\u6cd5\n<\/p><\/blockquote>\n<p><code>wait()<\/code>\uff1a \u4f7f \u4e00 \u4e2a \u7ebf \u7a0b \u5904 \u4e8e \u7b49 \u5f85 \uff08 \u963b \u585e \uff09 \u72b6 \u6001 \uff0c \u5e76 \u4e14 \u91ca \u653e \u6240 \u6301 \u6709 \u7684 \u5bf9 \u8c61 \u7684 \u9501 \uff1b <code>sleep()<\/code>\uff1a\u4f7f\u4e00\u4e2a\u6b63\u5728\u8fd0\u884c\u7684\u7ebf\u7a0b\u5904\u4e8e\u7761\u7720\u72b6\u6001\uff0c\u662f\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff0c\u8c03\u7528\u6b64\u65b9\u6cd5\u8981\u5904\u7406 InterruptedException \u5f02\u5e38\uff1b<br \/>\n<code>notify()<\/code>\uff1a\u5524\u9192\u4e00\u4e2a\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\u7684\u7ebf\u7a0b\uff0c\u5f53\u7136\u5728\u8c03\u7528\u6b64\u65b9\u6cd5\u7684\u65f6\u5019\uff0c\u5e76\u4e0d\u80fd\u786e\u5207\u7684\u5524\u9192\u67d0\u4e00\u4e2a\u7b49\u5f85\u72b6\u6001\u7684\u7ebf\u7a0b\uff0c\u800c\u662f\u7531 JVM \u786e\u5b9a\u5524\u9192\u54ea\u4e2a\u7ebf\u7a0b\uff0c\u800c\u4e14\u4e0e\u4f18\u5148\u7ea7\u65e0\u5173\uff1b<br \/>\n<code>notityAll()<\/code>\uff1a\u5524\u9192\u6240\u6709\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\u7684\u7ebf\u7a0b\uff0c\u8be5\u65b9\u6cd5\u5e76\u4e0d\u662f\u5c06\u5bf9\u8c61\u7684\u9501\u7ed9\u6240\u6709\u7ebf\u7a0b\uff0c\u800c\u662f\u8ba9\u5b83\u4eec\u7ade\u4e89\uff0c\u53ea\u6709\u83b7\u5f97\u9501 \u7684\u7ebf\u7a0b\u624d\u80fd\u8fdb\u5165\u5c31\u7eea\u72b6\u6001\uff1b<br \/>\n\u6ce8\u610f\uff1ajava 5 \u901a\u8fc7 Lock \u63a5\u53e3\u63d0\u4f9b\u4e86\u663e\u793a\u7684\u9501\u673a\u5236\uff0cLock \u63a5\u53e3\u4e2d\u5b9a\u4e49\u4e86\u52a0\u9501\uff08lock\uff08\uff09\u65b9\u6cd5\uff09\u548c\u89e3\u9501\uff08unLock\uff08\uff09 \u65b9\u6cd5\uff09\uff0c\u589e\u5f3a\u4e86\u591a\u7ebf\u7a0b\u7f16\u7a0b\u7684\u7075\u6d3b\u6027\u53ca\u5bf9\u7ebf\u7a0b\u7684\u534f\u8c03<\/p>\n<blockquote><p>\n  \u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\u662f\u8c03\u7528 run()\u65b9\u6cd5\u8fd8\u662f start()\u65b9\u6cd5\n<\/p><\/blockquote>\n<p>\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\u662f\u8c03\u7528 start()\u65b9\u6cd5\uff0c\u4f7f\u7ebf\u7a0b\u6240\u4ee3\u8868\u7684\u865a\u62df\u5904\u7406\u673a\u5904\u4e8e\u53ef\u8fd0\u884c\u72b6\u6001\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u53ef\u4ee5\u7531 JVM \u8c03\u5ea6\u5e76 \u6267\u884c\uff0c\u8fd9\u5e76\u4e0d\u610f\u5473\u7740\u7ebf\u7a0b\u5c31\u4f1a\u7acb\u5373\u8fd0\u884c\u3002 run()\u65b9\u6cd5\u662f\u7ebf\u7a0b\u542f\u52a8\u540e\u8981\u8fdb\u884c\u56de\u8c03\uff08callback\uff09\u7684\u65b9\u6cd5\u3002<\/p>\n<blockquote><p>\n  \u7ebf\u7a0b\u7684\u8f6c\u6362\u72b6\u6001\n<\/p><\/blockquote>\n<p><img src=\"https:\/\/www.specialwu.com\/wp-content\/uploads\/2021\/03\/\u7ebf\u7a0b\u72b6\u6001\u8f6c\u6362\u56fe.png\" alt=\"\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%A4%9A%E7%BA%BF%E7%A8%8B%E5%AE%9E%E7%8E%B0%E6%96%B9%E5%BC%8F\"><\/span>\u591a\u7ebf\u7a0b\u5b9e\u73b0\u65b9\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Java\u591a\u7ebf\u7a0b\u5b9e\u73b0\u65b9\u5f0f\u4e3b\u8981\u6709\u56db\u79cd\uff1a\u7ee7\u627fThread\u7c7b\u3001\u5b9e\u73b0Runnable\u63a5\u53e3\u3001\u5b9e\u73b0Callable\u63a5\u53e3\u901a\u8fc7FutureTask\u5305\u88c5\u5668\u6765\u521b\u5efaThread\u7ebf\u7a0b\u3001\u4f7f\u7528ExecutorService\u3001Callable\u3001Future\u5b9e\u73b0\u6709\u8fd4\u56de\u7ed3\u679c\u7684\u591a\u7ebf\u7a0b\u3002<\/p>\n<pre><code class=\"language-java line-numbers\">\/\/\u7ee7\u627fThread\u7c7b\n  public static void main(String[] args){\n        Test te=new Test();\n        Test te1=new Test();\n        te.start();\n        te1.start();\n        }\n    @Override\n    public void run() {\n        System.out.println(\"\u6211\u662frun\u65b9\u6cd5\"+new Thread().getName());\n    }\n\u6211\u662frun\u65b9\u6cd5Thread-2\n\u6211\u662frun\u65b9\u6cd5Thread-3\n\/\/\u5b9e\u73b0Runnable\u63a5\u53e3\npublic class Test implements Runnable {\n    public static void main(String[] args){\n        Test te=new Test();\n        Thread thread=new Thread(te);\n        thread.start();\n        }\n    @Override\n    public void run() {\n        System.out.println(\"\u6211\u6765\u4e86\"+new Thread().getName());\n    }\n}\n<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"%E7%BA%BF%E7%A8%8B%E4%BA%92%E6%96%A5%E4%B8%8E%E5%90%8C%E6%AD%A5\"><\/span>\u7ebf\u7a0b\u4e92\u65a5\u4e0e\u540c\u6b65<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5728\u5f15\u5165\u591a\u7ebf\u7a0b\u540e\uff0c\u7531\u4e8e\u7ebf\u7a0b\u6267\u884c\u7684\u5f02\u6b65\u6027\uff0c\u4f1a\u7ed9\u7cfb\u7edf\u9020\u6210\u6df7\u4e71\uff0c\u7279\u522b\u662f\u5728\u6025\u7528\u4e34\u754c\u8d44\u6e90\u65f6\uff0c\u5982\u591a\u4e2a\u7ebf\u7a0b\u6025\u7528\u540c\u4e00\u53f0\u6253 \u5370\u673a\uff0c\u4f1a\u4f7f\u6253\u5370\u7ed3\u679c\u4ea4\u7ec7\u5728\u4e00\u8d77\uff0c\u96be\u4e8e\u533a\u5206\u3002\u5f53\u591a\u4e2a\u7ebf\u7a0b\u6025\u7528\u5171\u4eab\u53d8\u91cf\uff0c\u8868\u683c\uff0c\u94fe\u8868\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6570\u636e\u5904\u7406\u51fa\u9519\uff0c\u56e0\u6b64\u7ebf\u7a0b\u540c\u6b65\u7684\u4e3b\u8981\u4efb\u52a1\u662f\u4f7f\u5e76\u53d1\u6267\u884c\u7684\u5404\u7ebf\u7a0b\u4e4b\u95f4\u80fd\u591f\u6709\u6548\u7684\u5171\u4eab\u8d44\u6e90\u548c\u76f8\u4e92\u5408\u4f5c\uff0c\u4ece\u800c\u4f7f\u7a0b\u5e8f\u7684\u6267\u884c\u5177\u6709\u53ef\u518d\u73b0\u6027\u3002<br \/>\n\u5f53\u7ebf\u7a0b\u5e76\u53d1\u6267\u884c\u65f6\uff0c\u7531\u4e8e\u8d44\u6e90\u5171\u4eab\u548c\u7ebf\u7a0b\u534f\u4f5c\uff0c\u4f7f\u7528\u7ebf\u7a0b\u4e4b\u95f4\u4f1a\u5b58\u5728\u4ee5\u4e0b\u4e24\u79cd\u5236\u7ea6\u5173\u7cfb\u3002<br \/>\n1. \u95f4\u63a5\u76f8\u4e92\u5236\u7ea6\u3002<\/p>\n<p>\u4e00\u4e2a\u7cfb\u7edf\u4e2d\u7684\u591a\u4e2a\u7ebf\u7a0b\u5fc5\u7136\u8981\u5171\u4eab\u67d0\u79cd\u7cfb\u7edf\u8d44\u6e90\uff0c\u5982\u5171\u4eab CPU\uff0c\u5171\u4eab I\/O \u8bbe\u5907\uff0c\u6240\u8c13\u95f4\u63a5 \u76f8\u4e92\u5236\u7ea6\u5373\u6e90\u4e8e\u8fd9\u79cd\u8d44\u6e90\u5171\u4eab\uff0c\u6253\u5370\u673a\u5c31\u662f\u6700\u597d\u7684\u4f8b\u5b50\uff0c\u7ebf\u7a0b A \u5728\u4f7f\u7528\u6253\u5370\u673a\u65f6\uff0c\u5176\u5b83\u7ebf\u7a0b\u90fd\u8981\u7b49\u5f85\u3002<br \/>\n2. \u76f4\u63a5\u76f8\u4e92\u5236\u7ea6\u3002<\/p>\n<p>\u8fd9\u79cd\u5236\u7ea6\u4e3b\u8981\u662f\u56e0\u4e3a\u7ebf\u7a0b\u4e4b\u95f4\u7684\u5408\u4f5c\uff0c\u5982\u6709\u7ebf\u7a0b A \u5c06\u8ba1\u7b97\u7ed3\u679c\u63d0\u4f9b\u7ed9\u7ebf\u7a0b B \u4f5c\u8fdb\u4e00\u6b65\u5904\u7406\uff0c \u90a3\u4e48\u7ebf\u7a0b B \u5728\u7ebf\u7a0b A \u5c06\u6570\u636e\u9001\u8fbe\u4e4b\u524d\u90fd\u5c06\u5904\u4e8e\u963b\u585e\u72b6\u6001\u3002 \u95f4\u63a5\u76f8\u4e92\u5236\u7ea6\u53ef\u4ee5\u79f0\u4e3a\u4e92\u65a5\uff0c\u76f4\u63a5\u76f8\u4e92\u5236\u7ea6\u53ef\u4ee5\u79f0\u4e3a\u540c\u6b65\uff0c\u5bf9\u4e8e\u4e92\u65a5\u53ef\u4ee5\u8fd9\u6837\u7406\u89e3\uff0c\u7ebf\u7a0b A \u548c\u7ebf\u7a0b B \u4e92\u65a5\u8bbf\u95ee \u67d0\u4e2a\u8d44\u6e90\u5219\u5b83\u4eec\u4e4b\u95f4\u5c31\u4f1a\u4ea7\u4e2a\u987a\u5e8f\u95ee\u9898\u2014\u2014\u8981\u4e48\u7ebf\u7a0b A \u7b49\u5f85\u7ebf\u7a0b B \u64cd\u4f5c\u5b8c\u6bd5\uff0c\u8981\u4e48\u7ebf\u7a0b B \u7b49\u5f85\u7ebf\u7a0b\u64cd\u4f5c\u5b8c\u6bd5\uff0c\u8fd9\u5176 \u5b9e\u5c31\u662f\u7ebf\u7a0b\u7684\u540c\u6b65\u4e86\u3002\u56e0\u6b64\u540c\u6b65\u5305\u62ec\u4e92\u65a5\uff0c\u4e92\u65a5\u5176\u5b9e\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u540c\u6b65\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%B9%B6%E5%8F%91%E9%98%9F%E5%88%97-%E9%98%BB%E5%A1%9E%E9%98%9F%E5%88%97\"><\/span>\u5e76\u53d1\u961f\u5217-\u963b\u585e\u961f\u5217<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5e38\u7528\u7684\u5e76\u53d1\u961f\u5217\u6709\u963b\u585e\u961f\u5217\u548c\u975e\u963b\u585e\u961f\u5217\uff0c\u524d\u8005\u4f7f\u7528\u9501\u5b9e\u73b0\uff0c\u540e\u8005\u5219\u4f7f\u7528 CAS \u975e\u963b\u585e\u7b97\u6cd5\u5b9e\u73b0<\/p>\n<h4><span class=\"ez-toc-section\" id=\"BlockingQueue_%E9%98%BB%E5%A1%9E%E9%98%9F%E5%88%97\"><\/span>BlockingQueue \u963b\u585e\u961f\u5217<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>BlockingQueue \u901a\u5e38\u7528\u4e8e\u4e00\u4e2a\u7ebf\u7a0b\u751f\u4ea7\u5bf9\u8c61\uff0c\u800c\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0b\u6d88\u8d39\u8fd9\u4e9b\u5bf9\u8c61\u7684\u573a\u666f\u3002<br \/>\n\u4e00\u4e2a\u7ebf\u7a0b\u5f80\u91cc\u8fb9\u653e\uff0c\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0b\u4ece\u91cc\u8fb9\u53d6\u7684\u4e00\u4e2a BlockingQueue\u3002 \u4e00\u4e2a\u7ebf\u7a0b\u5c06\u4f1a\u6301\u7eed\u751f\u4ea7\u65b0\u5bf9\u8c61\u5e76\u5c06\u5176\u63d2\u5165\u5230\u961f\u5217\u4e4b\u4e2d\uff0c\u76f4\u5230\u961f\u5217\u8fbe\u5230\u5b83\u6240\u80fd\u5bb9\u7eb3\u7684\u4e34\u754c\u70b9\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u662f\u6709\u9650 \u7684\u3002\u5982\u679c\u8be5\u963b\u585e\u961f\u5217\u5230\u8fbe\u4e86\u5176\u4e34\u754c\u70b9\uff0c\u8d1f\u8d23\u751f\u4ea7\u7684\u7ebf\u7a0b\u5c06\u4f1a\u5728\u5f80\u91cc\u8fb9\u63d2\u5165\u65b0\u5bf9\u8c61\u65f6\u53d1\u751f\u963b\u585e\u3002\u5b83\u4f1a\u4e00\u76f4\u5904\u4e8e\u963b\u585e\u4e4b\u4e2d\uff0c \u76f4 \u5230\u8d1f\u8d23\u6d88\u8d39\u7684\u7ebf\u7a0b\u4ece\u961f\u5217\u4e2d\u62ff\u8d70\u4e00\u4e2a\u5bf9\u8c61\u3002\u8d1f\u8d23\u6d88\u8d39\u7684\u7ebf\u7a0b\u5c06\u4f1a\u4e00\u76f4\u4ece\u8be5\u963b\u585e\u961f\u5217\u4e2d\u62ff\u51fa\u5bf9\u8c61\u3002\u5982\u679c\u6d88\u8d39\u7ebf\u7a0b\u5c1d\u8bd5\u53bb\u4ece\u4e00\u4e2a \u7a7a\u7684\u961f\u5217\u4e2d\u63d0\u53d6\u5bf9\u8c61\u7684\u8bdd\uff0c\u8fd9\u4e2a\u6d88\u8d39\u7ebf\u7a0b\u5c06\u4f1a\u5904\u4e8e\u963b\u585e\u4e4b\u4e2d\uff0c\u76f4\u5230\u4e00\u4e2a\u751f\u4ea7\u7ebf\u7a0b\u628a\u4e00\u4e2a\u5bf9\u8c61\u4e22\u8fdb\u961f\u5217\u3002<\/p>\n<blockquote><p>\n  \u9700\u6c42\uff1a\u5728\u591a\u7ebf\u7a0b\u64cd\u4f5c\u4e0b\uff0c\u4e00\u4e2a\u6570\u7ec4\u4e2d\u6700\u591a\u53ea\u80fd\u5b58\u5165 3 \u4e2a\u5143\u7d20\u3002\u591a\u653e\u5165\u4e0d\u53ef\u4ee5\u5b58\u5165\u6570\u7ec4\uff0c\u6216\u7b49\u5f85\u67d0\u7ebf\u7a0b\u5bf9\u6570\u7ec4\u4e2d\u67d0\u4e2a\u5143\u7d20\u53d6\u8d70\u624d\u80fd\u653e\u5165\uff0c\u8981\u6c42\u4f7f\u7528 java \u7684\u591a\u7ebf\u7a0b\u6765\u5b9e\u73b0\n<\/p><\/blockquote>\n<pre><code class=\"language-java line-numbers\">public class Test  {\n    public static void main(String[] args) {\n        final BlockingQueue queue = new ArrayBlockingQueue(3);\n    for(int i=0;i&lt;2;i++){\n        \/\/\u8d1f\u8d23\u63d2\u5165\u7684\u7ebf\u7a0b\n        new Thread(){\n            public void run(){\n                while(true){\n                try {\n                    Thread.sleep((long)(Math.random()*1000) );\n                    System.out.println(Thread.currentThread().getName() + \"\u51c6\u5907\u653e\u6570\u636e!\");\n                    queue.put(1);\n                    System.out.println(Thread.currentThread().getName() + \"\u5df2\u7ecf\u653e\u4e86\u6570\u636e\uff0c\" + \"\u961f\u5217\u76ee\u524d\u6709\" + queue.size() + \"\u4e2a\u6570\u636e\");\n                } catch (InterruptedException e) {\n                    e.printStackTrace();\n                }\n            }\n            }\n        }.start();\n    }   \/\/\u8d1f\u8d23\u79fb\u9664\u7684\u7ebf\u7a0b\n        new Thread(){\n            public void run(){\n                while(true){\n                    try {\n                        \/\/\u5c06\u6b64\u5904\u7684\u7761\u7720\u65f6\u95f4\u5206\u522b\u6539\u4e3a 100 \u548c1000\uff0c\u89c2\u5bdf\u8fd0\u884c\u7ed3\u679c\n                        Thread.sleep(1000);\n                        System.out.println(Thread.currentThread().getName() + \"\u51c6\u5907\u53d6\u6570\u636e!\");\n                        System.err.println(queue.take());\n                        System.out.println(Thread.currentThread().getName() + \"\u5df2\u7ecf\u53d6\u8d70\u6570\u636e\uff0c\" + \"\u961f\u5217\u76ee\u524d\u6709\" + queue.size() + \"\u4e2a\u6570\u636e\");\n                    } catch (InterruptedException e) {\n                        e.printStackTrace();\n                    }\n                }\n            }\n        }.start();\n}\n}\nhread-1\u51c6\u5907\u653e\u6570\u636e!\nThread-1\u5df2\u7ecf\u653e\u4e86\u6570\u636e\uff0c\u961f\u5217\u76ee\u524d\u67091\u4e2a\u6570\u636e\nThread-0\u51c6\u5907\u653e\u6570\u636e!\nThread-0\u5df2\u7ecf\u653e\u4e86\u6570\u636e\uff0c\u961f\u5217\u76ee\u524d\u67092\u4e2a\u6570\u636e\nThread-2\u51c6\u5907\u53d6\u6570\u636e!\nThread-2\u5df2\u7ecf\u53d6\u8d70\u6570\u636e\uff0c\u961f\u5217\u76ee\u524d\u67091\u4e2a\u6570\u636e\nThread-1\u51c6\u5907\u653e\u6570\u636e!\nThread-1\u5df2\u7ecf\u653e\u4e86\u6570\u636e\uff0c\u961f\u5217\u76ee\u524d\u67092\u4e2a\u6570\u636e\nThread-0\u51c6\u5907\u653e\u6570\u636e!\nThread-0\u5df2\u7ecf\u653e\u4e86\u6570\u636e\uff0c\u961f\u5217\u76ee\u524d\u67093\u4e2a\u6570\u636e\n<\/code><\/pre>\n<p><code>\u516c\u5e73\u9501<\/code>\uff1a\u5c31\u662f\u5728\u5e76\u53d1\u73af\u5883\u4e2d\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u5728\u83b7\u53d6\u9501\u65f6\u4f1a\u5148\u67e5\u770b\u6b64\u9501\u7ef4\u62a4\u7684\u7b49\u5f85\u961f\u5217\uff0c\u5982\u679c\u4e3a\u7a7a\uff0c\u6216\u8005\u5f53\u524d\u7ebf\u7a0b\u7ebf \u7a0b\u662f\u7b49\u5f85\u961f\u5217\u7684\u7b2c\u4e00\u4e2a\uff0c\u5c31\u5360\u6709\u9501\uff0c\u5426\u5219\u5c31\u4f1a\u52a0\u5165\u5230\u7b49\u5f85\u961f\u5217\u4e2d\uff0c\u4ee5\u540e\u4f1a\u6309\u7167 FIFO \u7684\u89c4\u5219\u4ece\u961f\u5217\u4e2d\u53d6\u5230\u81ea\u5df1\u3002 <code>\u975e\u516c\u5e73\u9501<\/code>\uff1a\u6bd4\u8f83\u7c97\u9c81\uff0c\u4e0a\u6765\u5c31\u76f4\u63a5\u5c1d\u8bd5\u5360\u6709\u9501\uff0c\u5982\u679c\u5c1d\u8bd5\u5931\u8d25\uff0c\u5c31\u518d\u91c7\u7528\u7c7b\u4f3c\u516c\u5e73\u9501\u90a3\u79cd\u65b9\u5f0f<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E7%BA%BF%E7%A8%8B%E6%B1%A0\"><\/span>\u7ebf\u7a0b\u6c60<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>\u662f\u4ec0\u4e48<\/li>\n<\/ol>\n<p>\u7ebf\u7a0b\u6c60\u5c31\u662f\u4e8b\u5148\u5c06\u591a\u4e2a\u7ebf\u7a0b\u5bf9\u8c61\u653e\u5230\u4e00\u4e2a\u5bb9\u5668\u4e2d\uff0c\u5f53\u4f7f\u7528\u7684\u65f6\u5019\u5c31\u4e0d\u7528 new \u7ebf\u7a0b\u800c\u662f\u76f4\u63a5\u53bb\u6c60\u4e2d\u62ff\u7ebf\u7a0b\u5373\u53ef\uff0c \u8282\u7701\u4e86\u5f00\u8f9f\u5b50\u7ebf\u7a0b\u7684\u65f6\u95f4\uff0c\u63d0\u9ad8\u7684\u4ee3\u7801\u6267\u884c\u6548\u7387<br \/>\n1. \u7ebf\u7a0b\u6c60\u7684\u4f5c\u7528<\/p>\n<p>\u7ebf\u7a0b\u6c60\u4f5c\u7528\u5c31\u662f\u9650\u5236\u7cfb\u7edf\u4e2d\u6267\u884c\u7ebf\u7a0b\u7684\u6570\u91cf\u3002 \u6839\u636e\u7cfb\u7edf\u7684\u73af\u5883\u60c5\u51b5\uff0c\u53ef\u4ee5\u81ea\u52a8\u6216\u624b\u52a8\u8bbe\u7f6e\u7ebf\u7a0b\u6570\u91cf\uff0c\u8fbe\u5230\u8fd0\u884c\u7684\u6700\u4f73\u6548\u679c\uff1b\u5c11\u4e86\u6d6a\u8d39\u4e86\u7cfb\u7edf\u8d44\u6e90\uff0c\u591a\u4e86\u9020 \u6210\u7cfb\u7edf\u62e5\u6324\u6548\u7387\u4e0d\u9ad8\u3002\u7528\u7ebf\u7a0b\u6c60\u63a7\u5236\u7ebf\u7a0b\u6570\u91cf\uff0c\u5176\u4ed6\u7ebf\u7a0b \u6392\u961f\u7b49\u5019\u3002\u4e00\u4e2a\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u518d\u4ece\u961f\u5217\u7684\u4e2d\u53d6\u6700\u524d\u9762 \u7684\u4efb\u52a1\u5f00\u59cb\u6267\u884c\u3002\u82e5\u961f\u5217\u4e2d\u6ca1\u6709\u7b49\u5f85\u8fdb\u7a0b\uff0c\u7ebf\u7a0b\u6c60\u7684\u8fd9\u4e00\u8d44\u6e90\u5904\u4e8e\u7b49\u5f85\u3002\u5f53\u4e00\u4e2a\u65b0\u4efb\u52a1\u9700\u8981\u8fd0\u884c\u65f6\uff0c\u5982\u679c\u7ebf\u7a0b \u6c60 \u4e2d\u6709\u7b49\u5f85\u7684\u5de5\u4f5c\u7ebf\u7a0b\uff0c\u5c31\u53ef\u4ee5\u5f00\u59cb\u8fd0\u884c\u4e86\uff1b\u5426\u5219\u8fdb\u5165\u7b49\u5f85\u961f\u5217\u3002<\/p>\n<ol start=\"2\">\n<li>\u9009\u7528\u7684\u610f\u4e49<\/li>\n<\/ol>\n<p>\u51cf\u5c11\u4e86\u521b\u5efa\u548c\u9500\u6bc1\u7ebf\u7a0b\u7684\u6b21\u6570\uff0c\u6bcf\u4e2a\u5de5\u4f5c\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u88ab\u91cd\u590d\u5229\u7528\uff0c\u53ef\u6267\u884c\u591a\u4e2a\u4efb\u52a1\uff0c\u53ef\u4ee5\u6839\u636e\u7cfb\u7edf\u7684\u627f\u53d7\u80fd\u529b\uff0c\u8c03\u6574\u7ebf\u7a0b\u6c60\u4e2d\u5de5\u4f5c\u7ebf\u7ebf\u7a0b\u7684\u6570\u76ee\uff0c\u9632\u6b62\u56e0\u4e3a\u56e0\u4e3a\u6d88\u8017\u8fc7\u591a\u7684\u5185\u5b58\uff0c\u800c\u628a\u670d\u52a1 \u5668\u7d2f\u8db4\u4e0b(\u6bcf\u4e2a\u7ebf\u7a0b\u9700\u8981\u5927\u7ea6 1MB \u5185\u5b58\uff0c\u7ebf\u7a0b\u5f00\u7684\u8d8a\u591a\uff0c\u6d88\u8017\u7684\u5185\u5b58\u4e5f\u5c31\u8d8a\u5927\uff0c\u6700\u540e\u6b7b\u673a)<\/p>\n<ul>\n<li>\u7ebf\u7a0b\u6c60\u521b\u5efa\u7ebf\u7a0b\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4e0b\u9762\u4e09\u79cd\uff1a<\/li>\n<\/ul>\n<pre><code class=\"language-java line-numbers\">\/\/\u521b\u5efa\u56fa\u5b9a\u5927\u5c0f\u7684\u7ebf\u7a0b\u6c60 \nExecutorService fPool = Executors.newFixedThreadPool(3);\n\/\/\u521b\u5efa\u7f13\u5b58\u5927\u5c0f\u7684\u7ebf\u7a0b\u6c60\nExecutorService cPool = Executors.newCachedThreadPool();\n\/\/\u521b\u5efa\u5355\u4e00\u7684\u7ebf\u7a0b\u6c60 \nExecutorService sPool = Executors.newSingleThreadExecutor();\n<\/code><\/pre>\n<h1><span class=\"ez-toc-section\" id=\"%E7%BD%91%E7%BB%9C%E9%80%9A%E4%BF%A1\"><\/span>\u7f51\u7edc\u901a\u4fe1<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<blockquote><p>\n  TCP\u548cUDP\n<\/p><\/blockquote>\n<p>TCP\u5728\u4f20\u9012\u6570\u636e\u4e4b\u524d\uff0c\u4f1a\u6709\u4e09\u6b21\u63e1\u624b\u6765\u5efa\u7acb\u8fde\u63a5\uff0c\u800c\u4e14\u5728\u6570\u636e\u4f20\u9012\u65f6\uff0c\u6709\u786e\u8ba4\u3001\u7a97\u53e3\u3001\u91cd\u4f20\u3001\u62e5\u585e\u63a7\u5236\u673a\u5236\uff0c\u5728\u6570\u636e\u4f20\u5b8c\u540e\uff0c\u8fd8\u4f1a\u65ad\u5f00\u8fde\u63a5\u7528\u6765\u8282\u7ea6\u7cfb\u7edf\u8d44\u6e90\u3002\u6bcf\u4e00\u6761TCP\u8fde\u63a5\u53ea\u80fd\u662f\u70b9\u5230\u70b9\u7684\u3002\u56e0\u4e3aTCP\u6709\u786e\u8ba4\u673a\u5236\u3001\u4e09\u6b21\u63e1\u624b\u673a\u5236\uff0c\u8fd9\u4e9b\u4e5f\u5bfc\u81f4TCP\u5bb9\u6613\u88ab\u4eba\u5229\u7528\uff0c\u5b9e\u73b0DOS\u3001DDOS\u3001CC\u7b49\u653b\u51fb\u3002<br \/>\nUDP\u652f\u6301\u591a\u5bf9\u591a\uff0c\u4e00\u5bf9\u591a\uff0cUDP\u662f\u4e00\u4e2a\u65e0\u72b6\u6001\u7684\u4f20\u8f93\u534f\u8bae\uff0c\u6240\u4ee5\u5b83\u5728\u4f20\u9012\u6570\u636e\u65f6\u975e\u5e38\u5feb\u3002\u6ca1\u6709TCP\u7684\u8fd9\u4e9b\u673a\u5236\uff0cDP\u8f83TCP\u88ab\u653b\u51fb\u8005\u5229\u7528\u7684\u6f0f\u6d1e\u5c31\u8981\u5c11\u4e00\u4e9b\u3002\u4f46UDP\u4e5f\u662f\u65e0\u6cd5\u907f\u514d\u653b\u51fb\u7684\uff0c\u6bd4\u5982\uff1aUDP Flood\u653b\u51fb\u2026\u2026 UDP\u7684\u7f3a\u70b9\uff1a \u4e0d\u53ef\u9760\uff0c\u4e0d\u7a33\u5b9a \u56e0\u4e3aUDP\u6ca1\u6709TCP\u90a3\u4e9b\u53ef\u9760\u7684\u673a\u5236<\/p>\n<blockquote><p>\n  HTTP \u4e0e HTTPS \u7684\u533a\u522b<br \/>\n  HTTP\uff08HyperText Transfer Protocol\uff1a\u8d85\u6587\u672c\u4f20\u8f93\u534f\u8bae\uff09\u9ed8\u8ba480\u7aef\u53e3<br \/>\n  HTTPS\uff08Hypertext Transfer Protocol Secure\uff1a\u8d85\u6587\u672c\u4f20\u8f93\u5b89\u5168\u534f\u8bae\uff09\u9ed8\u8ba4443\u7aef\u53e3\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>java\u865a\u62df\u673a\u90e8\u5206 \u5783\u573e\u56de\u6536\u7b97\u6cd5 GC\u6548\u7387 \u5185\u5b58\u6548\u7387\uff1a\u590d\u5236\u7b97\u6cd5>\u6807\u8bb0\u538b\u7f29\u7b97\u6cd5 \u5185\u5b58\u6574\u9f50\u5ea6\uff1a\u590d\u5236\u7b97\u6cd5=\u6807\u8bb0\u538b\u7f29\u7b97 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"_links":{"self":[{"href":"http:\/\/www.specialwu.com\/index.php?rest_route=\/wp\/v2\/posts\/1527"}],"collection":[{"href":"http:\/\/www.specialwu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.specialwu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.specialwu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.specialwu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1527"}],"version-history":[{"count":23,"href":"http:\/\/www.specialwu.com\/index.php?rest_route=\/wp\/v2\/posts\/1527\/revisions"}],"predecessor-version":[{"id":1931,"href":"http:\/\/www.specialwu.com\/index.php?rest_route=\/wp\/v2\/posts\/1527\/revisions\/1931"}],"wp:attachment":[{"href":"http:\/\/www.specialwu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.specialwu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1527"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.specialwu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}