{"id":1343,"date":"2023-06-27T13:54:26","date_gmt":"2023-06-27T05:54:26","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=1343"},"modified":"2023-06-27T13:54:26","modified_gmt":"2023-06-27T05:54:26","slug":"%e9%9d%a2%e8%af%95%e5%ae%98-copyonwrite%e5%ae%b9%e5%99%a8%e6%9c%89%e4%ba%86%e8%a7%a3%e8%bf%87%e5%90%97-%e8%af%b4%e8%af%b4%e7%9c%8b","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/%e9%9d%a2%e8%af%95%e5%ae%98-copyonwrite%e5%ae%b9%e5%99%a8%e6%9c%89%e4%ba%86%e8%a7%a3%e8%bf%87%e5%90%97-%e8%af%b4%e8%af%b4%e7%9c%8b\/","title":{"rendered":"\u9762\u8bd5\u5b98: CopyOnWrite\u5bb9\u5668\u6709\u4e86\u89e3\u8fc7\u5417? \u8bf4\u8bf4\u770b"},"content":{"rendered":"
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<\/span>\u9762\u8bd5\u5b98: CopyOnWrite\u5bb9\u5668\u6709\u4e86\u89e3\u8fc7\u5417? \u8bf4\u8bf4\u770b<\/span><\/span><\/h1>\n

<\/span>\u524d\u8a00<\/span><\/span><\/h2>\n

\u76ee\u524d\u6b63\u5728\u51fa\u4e00\u4e2aJava\u591a\u7ebf\u7a0b\u4e13\u9898<\/code>\u957f\u671f\u7cfb\u5217\u6559\u7a0b\uff0c\u4ece\u5165\u95e8\u5230\u8fdb\u9636\u542b\u6e90\u7801\u89e3\u8bfb<\/code>, \u7bc7\u5e45\u4f1a\u8f83\u591a, \u559c\u6b22\u7684\u8bdd\uff0c\u7ed9\u4e2a\u5173\u6ce8\u2764\ufe0f ~<\/p>\n

<\/mpprofile><\/section>\n

<\/span>CopyOnWrite\u5bb9\u5668<\/span><\/span><\/h2>\n

\u627f\u63a5\u4e0a\u6587\uff0c\u6211\u4eec\u7ee7\u7eed\u63a2\u8ba8\u5e76\u53d1\u5bb9\u5668\uff0c\u672c\u8282\u4e3b\u8981\u7ed9\u5927\u5bb6\u8bb2\u4e00\u4e0bCopyOnWrite\u5bb9\u5668<\/code>\u3002\u5176\u5b9e\u5462\uff0c\u5b83\u662f\u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\u7684\u4e00\u79cd\u4f18\u5316\u7b56\u7565\uff0c\u4ece\u5b57\u9762\u610f\u601d\u8bb2\u662f\u5199\u5165\u65f6\u590d\u5236<\/code>\u7684\u601d\u60f3\u3002<\/p>\n

\u4ec0\u4e48\u610f\u601d\u5462\u2753\u5c31\u662f\u8ba1\u7b97\u673a\u5728\u6267\u884c\u5e76\u53d1\u8c03\u7528\u7684\u65f6\u5019\uff0c\u6bd4\u5982\u9700\u8981\u5bf9\u67d0\u4e2a\u6570\u636e\u8fdb\u884c\u4fee\u6539\uff0c\u5b83\u4e0d\u4f1a\u76f4\u63a5\u4fee\u6539\u539f\u6570\u636e\uff0c\u800c\u662f\u5c06\u539f\u6570\u636e\u590d\u5236\u51fa\u6765\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n

\u518d\u7406\u89e3CopyOnWrite\u5bb9\u5668<\/code>\u5c31\u597d\u7406\u89e3\u4e86\uff0c\u610f\u601d\u4e5f\u662f\u4e00\u6837\u7684\uff0c\u8bb2\u5f53\u524d\u5bb9\u5668\u4e2d\u7684\u6570\u636e\u590d\u5236\u51fa\u6765\uff0c\u5373\u526f\u672c\u5bb9\u5668\uff0c\u5bf9\u5176\u8fdb\u884c\u4fee\u6539\uff0c\u8fbe\u5230\u8bfb\u5199\u5206\u79bb<\/code>\u7684\u76ee\u7684\uff0c\u6700\u540e\u518d\u8bb2\u539f\u5bb9\u5668\u7684\u5f15\u7528\u6267\u884c\u65b0\u7684\u5bb9\u5668\u3002<\/p>\n

\u8fd9\u4e48\u8bbe\u8ba1\u7684\u597d\u5904\u5f88\u660e\u663e\uff0c\u8bfb\u64cd\u4f5c\u4e0d\u9700\u8981\u9891\u7e41\u7684\u52a0\u9501<\/code>,JAVA<\/code>\u4e5f\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u6bd4\u8f83\u597d\u7528\u7684\u7c7bopyOnWriteArrayList\u548cCopyOnWriteArraySet<\/code>, \u672c\u8282\u4e3b\u8981\u9488\u5bf9opyOnWriteArrayList<\/code>\u8fdb\u884c\u8bb2\u89e3\u3002<\/p>\n

<\/span>CopyOnWriteArrayList<\/span><\/span><\/h2>\n

<\/span>\u597d\u5904\u4e0e\u574f\u5904<\/span><\/span><\/h3>\n

CopyOnWriteArrayList<\/code>\u7ecf\u5e38\u88ab\u7528\u5230\u8bfb\u591a\u5199\u5c11<\/code>\u7684\u573a\u666f\uff0c\u7531\u4e8e\u5b83\u4e0d\u9700\u8981\u9501<\/code>\u7b49\u540c\u6b65\u65b9\u6848\uff0c\u5728\u8bfb\u7684\u573a\u666f\u4e0b\u6027\u80fd\u6bd4\u8f83\u597d\u3002<\/p>\n

\u4f46\u662f\u5b83\u4e5f\u6709\u7f3a\u70b9\uff0c\u56e0\u4e3a\u5b83\u7684\u5b9e\u73b0\u9700\u8981\u62f7\u8d1d\u4e00\u4efd\u6570\u636e\uff0c\u6240\u4ee5\u5982\u679c\u6570\u636e\u91cf\u7279\u522b\u5927\u7684\u60c5\u51b5\u4e0b\uff0c\u5185\u5b58\u538b\u529b\u4f1a\u6bd4\u8f83\u5927\uff0c\u5f88\u5bb9\u6613\u5f15\u53d1FULL GC<\/code>\u3002\u53e6\u5916\uff0c\u7531\u4e8e\u8bfb\u5199\u90fd\u662f\u4f5c\u7528\u5728\u65b0\u7684\u5bb9\u5668\u4e0a\uff0c\u5728\u5199\u64cd\u4f5c\u65f6\uff0c\u8bfb\u4e0d\u4f1a\u88ab\u963b\u585e\uff0c\u6709\u65f6\u5019\u4f1a\u53d1\u751f\u8bfb\u5230\u8001\u6570\u636e\u3002<\/p>\n

<\/span>\u5982\u4f55\u53bb\u4f7f\u7528?<\/span><\/span><\/h3>\n
<\/span>public<\/span> E get<\/span>(int<\/span> index)<\/span> <\/span>{
      return<\/span> get(getArray(), index);
}

private<\/span> E get<\/span>(Object[] a, int<\/span> index)<\/span> <\/span>{
        return<\/span> (E) a[index];
}
<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u51fa\u6b64\u8fc7\u7a0b\u5e76\u6ca1\u6709\u52a0\u9501<\/code>\uff0c\u6240\u4ee5\u4ece\u6e90\u7801\u770bCopyOnWriteArrayList<\/code>\u9002\u5408\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f<\/p>\n
<\/span>\u7ed3\u675f\u8bed<\/span><\/span><\/h2>\n
\u6709\u5174\u8da3\u7684\u540c\u5b66\u53ef\u4ee5\u7ee7\u7eed\u7814\u7a76\u4e00\u4e0b\u5b83\u7684\u6e90\u7801\uff0c\u76f8\u5bf9\u6765\u8bb2\u4e0d\u96be.\u5927\u5bb6\u4e5f\u53ef\u4ee5\u4e3e\u4e00\u53cd\u4e09\uff0c\u8bd5\u7740\u901a\u8fc7CopyOnWrite<\/code>\u673a\u5236\u5199\u4e00\u4e2aCopyOnWriteMap<\/code>\uff0c\u53ef\u4ee5\u53c2\u8003CopyOnWriteArrayList\u5b9e\u73b0<\/code>\u3002\u4e0b\u8282\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u51e0\u4e2a\u5e76\u53d1\u5de5\u5177\u7c7b ~<\/p>\n
<\/mp-miniprogram><\/p>\n
<\/span>\u5f80\u671f\u5185\u5bb9\u63a8\u8350<\/span><\/span><\/h2>\n