{"id":1307,"date":"2023-06-27T13:54:27","date_gmt":"2023-06-27T05:54:27","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=1307"},"modified":"2023-06-27T13:54:27","modified_gmt":"2023-06-27T05:54:27","slug":"%e9%9d%a2%e8%af%95%e5%ae%98-%e6%9c%89%e4%ba%86%e8%a7%a3%e8%bf%87synchronized%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-%e6%9c%89%e4%ba%86%e8%a7%a3%e8%bf%87synchronized%e5%90%97-%e8%af%b4%e8%af%b4%e7%9c%8b\/","title":{"rendered":"\u9762\u8bd5\u5b98: \u6709\u4e86\u89e3\u8fc7Synchronized\u5417 \u8bf4\u8bf4\u770b"},"content":{"rendered":"
\n
\n

<\/span>\u9762\u8bd5\u5b98: \u6709\u4e86\u89e3\u8fc7Synchronized\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 ~ \u672c\u7bc7\u5185\u5bb9\u7eaf\u7406\u8bba\u4e00\u70b9<\/p>\n

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

\u76f8\u4fe1\u5f88\u591a\u540c\u5b66\u5bf9synchronized<\/code>\u7684\u4f7f\u7528\u4e0a\u4e0d\u964c\u751f\uff0c\u4e4b\u524d\u4e5f\u7ed9\u5927\u5bb6\u8bb2\u89e3\u8fc7\u5b83\u7684\u4f7f\u7528\u3002\u672c\u7bc7\u4e3b\u8981\u5e26\u5927\u5bb6\u6df1\u5165\u4e86\u89e3\u4e00\u4e0b\u5b83\uff0c\u5927\u5bb6\u4e5f\u53ef\u4ee5\u81ea\u5df1\u8bd5\u7740\u603b\u7ed3\u4e00\u4e0b\uff0c\u8fd9\u4e5f\u662f\u9762\u8bd5<\/code>\u4e2d\u5e38\u5e38\u95ee\u5230\u7684\uff0c\u5355\u7eaf\u7684\u56de\u7b54\u5b83\u7684\u57fa\u672c\u4f7f\u7528\uff0c\u662f\u60ca\u8273\u4e0d\u5230\u9762\u8bd5\u5b98\u7684~<\/p>\n

<\/span>synchronized \u4ecb\u7ecd<\/span><\/span><\/h2>\n

\u4ece\u5b57\u9762\u610f\u601d\u7ffb\u8bd1\u8fc7\u6765\u5c31\u662f\u540c\u6b65<\/code>\u7684\u610f\u601d\uff0c\u6240\u4ee5\u5b83\u4e5f\u53eb\u540c\u6b65\u9501<\/code>,\u6211\u4eec\u901a\u5e38\u4f1a\u7ed9\u67d0\u4e2a\u65b9\u6cd5\u6216\u8005\u67d0\u5757\u4ee3\u7801\u52a0\u4e0aSynchronized<\/code>\u9501\u6765\u89e3\u51b3\u591a\u7ebf\u7a0b\u4e2d\u5e76\u53d1\u5e26\u6765\u7684\u95ee\u9898\uff0c\u5b83\u4e5f\u662f\u6700\u5e38\u7528,\u6700\u7b80\u5355\u7684\u4e00\u79cd\u65b9\u6cd5<\/p>\n

\u5728Java\u4e2d\uff0c\u9501<\/code>\u57fa\u672c\u4e0a\u90fd\u662f\u57fa\u4e8e\u5bf9\u8c61\u800c\u8a00\u7684\uff0c\u6240\u4ee5\u53c8\u79f0\u4e3a\u5bf9\u8c61\u9501<\/code>, \u4e00\u4e2a\u7c7b\u901a\u5e38\u53ea\u6709\u4e00\u4e2aclass<\/code>\u5bf9\u8c61\u548cn\u4e2a\u5b9e\u4f8b<\/code>\u5bf9\u8c61\uff0c\u5b83\u4eec\u5171\u4eabclass\u5bf9\u8c61<\/code>,\u800c\u6211\u4eec\u6709\u65f6\u5019\u4f1a\u5bf9class\u5bf9\u8c61<\/code>\u52a0\u9501,\u6240\u4ee5\u53c8\u79f0\u4e3aclass\u5bf9\u8c61\u9501<\/code><\/p>\n

\u8fd9\u91cc\u5927\u5bb6\u8981\u6ce8\u610f\u7684\u662f\u5bf9\u8c61\u9700\u8981\u662f\u4e00\u4e2a\u975enull<\/code>\u7684\u5bf9\u8c61,\u6211\u4eec\u901a\u5e38\u4e5f\u53eb\u505a\u5bf9\u8c61\u76d1\u89c6\u5668(Object Monitor)<\/code><\/p>\n

<\/span>\u91cd\u91cf\u7ea7\u9501<\/span><\/span><\/h3>\n

\u5728JDK 1.5<\/code>\u4e4b\u524d\uff0c\u5b83\u662f\u4e00\u4e2a\u91cd\u91cf\u7ea7\u9501<\/code>,\u6211\u4eec\u901a\u5e38\u90fd\u4f1a\u4f7f\u7528\u5b83\u6765\u4fdd\u8bc1\u7ebf\u7a0b\u540c\u6b65\u3002\u57281.5\u7684\u65f6\u5019\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2aLock<\/code>\u63a5\u53e3\u6765\u5b9e\u73b0\u540c\u6b65\u9501<\/code>\u7684\u529f\u80fd\uff0c\u6211\u4eec\u53ea\u9700\u8981\u663e\u5f0f<\/code>\u7684\u83b7\u53d6\u9501\u548c\u91ca\u653e\u9501\u3002<\/p>\n

\u91cd\u5728\u54ea\u2753<\/p>\n

\u57281.5\u7684\u65f6\u5019,Synchronized<\/code>\u5b83\u4f9d\u8d56\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5e95\u5c42\u7684Mutex Lock<\/code>\u5b9e\u73b0,\u6bcf\u6b21\u91ca\u653e\u9501\u548c\u83b7\u53d6\u9501\u90fd\u4f1a\u5bfc\u81f4\u7528\u6237\u6001\u548c\u5185\u6838\u6001<\/code>\u7684\u5207\u6362,\u4ece\u800c\u589e\u52a0\u7cfb\u7edf\u6027\u80fd\u7684\u5f00\u9500,\u5f53\u51fa\u73b0\u5927\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b\uff0c\u9501\u7ade\u4e89\u4f1a\u6bd4\u8f83\u6fc0\u70c8\uff0c\u6027\u80fd\u663e\u5f97\u975e\u5e38\u7cdf\u7cd5\uff0c\u6240\u4ee5\u79f0\u4e3a\u91cd\u91cf\u7ea7\u9501<\/code>,\u6240\u4ee5\u5927\u5bb6\u5f80\u5f80\u4f1a\u9009\u62e9Lock<\/code>\u9501\u3002<\/p>\n

<\/span>\u9501\u4f18\u5316<\/span><\/span><\/h3>\n

\u4f46\u662fSynchronized<\/code>\u53c8\u662f\u90a3\u4e48\u7684\u7b80\u5355\u597d\u7528\uff0c\u53c8\u662f\u5b98\u65b9\u81ea\u5e26\u7684\uff0c\u600e\u4e48\u53ef\u80fd\u653e\u5f03\u5462\uff1f\u6240\u4ee5\u57281.6\u4e4b\u540e\uff0c\u5f15\u5165\u4e86\u5927\u91cf\u7684\u9501\u4f18\u5316\uff0c\u6bd4\u5982\u81ea\u65cb\u9501<\/code>\uff0c\u8f7b\u91cf\u7ea7\u9501<\/code>, \u504f\u5411\u9501<\/code>\u7b49,\u4e0b\u9762\u6211\u4eec\u9010\u4e2a\u770b\u4e00\u4e0b~<\/p>\n

<\/span>synchronized \u5b9e\u73b0\u539f\u7406<\/span><\/span><\/h2>\n

\u6211\u4eec\u4e86\u89e3\u9501<\/code>\u4f18\u5316\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u770b\u4e00\u4e0b\u5b83\u7684\u5b9e\u73b0\u539f\u7406\u3002<\/p>\n

\u9996\u5148\u6211\u4eec\u770b\u4e0b\u540c\u6b65\u5757<\/code>\u4e2d\uff0c\u56e0\u4e3a\u5b83\u662f\u5173\u952e\u5b57\uff0c\u6211\u4eec\u770b\u4e0d\u5230\u6e90\u7801\u5b9e\u73b0\uff0c\u6240\u4ee5\u53ea\u80fd\u53cd\u7f16\u8bd1<\/code>\u770b\u4e00\u4e0b,\u901a\u8fc7 javap -v **.class<\/code><\/p>\n

<\/span>  public<\/span> synchronized<\/span> void<\/span> hello<\/span>()<\/span><\/span>;
    descriptor: ()V
    flags: ACC_PUBLIC, ACC_SYNCHRONIZED
    Code:
      stack=2<\/span>, locals=1<\/span>, args_size=1<\/span>
         0<\/span>: getstatic     #2<\/span>                  \/\/ Field java\/lang\/System.out:Ljava\/io\/PrintStream;<\/span>
         3<\/span>: ldc           #3<\/span>                  \/\/ String hello<\/span>
         5<\/span>: invokevirtual #4<\/span>                  \/\/ Method java\/io\/PrintStream.println:(Ljava\/lang\/String;)V<\/span>
         8<\/span>: return<\/span>
      LineNumberTable:
        line 25<\/span>: 0<\/span>
        line 26<\/span>: 8<\/span>
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            0<\/span>       9<\/span>     0<\/span>  this<\/span>   Lcom\/thread\/base\/Demo;
}


<\/code><\/pre>\n
\u6211\u4eec\u91cd\u70b9\u5173\u6ce8ACC_SYNCHRONIZED<\/code>,\u5b83\u4f5c\u7528\u5c31\u662f\u4e00\u65e6\u6267\u884c\u5230\u8fd9\u4e2a\u65b9\u6cd5\u65f6\uff0c\u5c31\u4f1a\u5148\u5224\u65ad\u662f\u5426\u6709\u6807\u5fd7\u4f4d\uff0c\u5982\u679c\u6709\uff0c\u5c31\u4f1a\u5148\u5c1d\u8bd5\u83b7\u53d6 monitor\uff0c\u83b7\u53d6\u6210\u529f\u624d\u80fd\u6267\u884c\u65b9\u6cd5\uff0c\u65b9\u6cd5\u6267\u884c\u5b8c\u6210\u540e\u518d\u91ca\u653e monitor\u3002\u5728\u65b9\u6cd5\u6267\u884c\u671f\u95f4\uff0c\u5176\u4ed6\u7ebf\u7a0b\u90fd\u65e0\u6cd5\u83b7\u53d6\u540c\u4e00\u4e2a monitor\u3002\u5f52\u6839\u7ed3\u5e95\u8fd8\u662f\u5bf9 monitor \u5bf9\u8c61\u7684\u4e89\u593a\uff0c\u53ea\u662f\u540c\u6b65\u65b9\u6cd5\u662f\u4e00\u79cd\u9690\u5f0f\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002<\/p>\n
synchronized \u5728 JVM \u91cc\u7684\u5b9e\u73b0\u5c31\u662f\u57fa\u4e8e\u8fdb\u5165\u548c\u9000\u51fa monitor \u6765\u5b9e\u73b0\u7684\uff0c\u5e95\u5c42\u5219\u662f\u901a\u8fc7\u6210\u5bf9\u7684 MonitorEnter \u548c MonitorExit \u6307\u4ee4\u6765\u5b9e\u73b0<\/p>\n
\u6709\u4e86\u4ee5\u4e0a\u7684\u8ba4\u8bc6\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u770b\u770b\u9501\u4f18\u5316<\/p>\n
<\/span>Synchronized\u4e2d\u7684\u9501\u4f18\u5316<\/span><\/span><\/h2>\n
<\/span>\u81ea\u9002\u5e94\u81ea\u65cb\u9501<\/span><\/span><\/h3>\n
\u81ea\u65cb\u9501<\/code>\uff0c\u4e4b\u524d\u6211\u4eec\u8bb2FutureTask<\/code>\u6e90\u7801\u7684\u65f6\u5019\uff0c\u6709\u4e00\u4e2a\u5185\u90e8\u65b9\u6cd5awaitDone()<\/code>,\u7ed9\u5927\u5bb6\u6709\u4ecb\u7ecd\u8fc7\uff0c\u5c31\u662f\u57fa\u4e8e\u5b83\u5b9e\u73b0\u7684\uff0c\u4eca\u5929\u518d\u7ed9\u5927\u5bb6\u603b\u7ed3\u4e00\u4e0b\u3002<\/p>\n
\u5b83\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u907f\u514d\u963b\u585e\u548c\u5524\u9192\u7684\u5207\u6362\uff0c\u5728\u6ca1\u6709\u83b7\u5f97\u9501\u7684\u65f6\u5019\u5c31\u4e0d\u8fdb\u5165\u963b\u585e\uff0c\u4e0d\u65ad\u5730\u5faa\u73af\u68c0\u6d4b\u9501\u662f\u5426\u88ab\u91ca\u653e\u3002\u4f46\u662f\uff0c\u5b83\u4e5f\u6709\u5f0a\u7aef\uff0c\u6211\u4eec\u901a\u5e38\u6765\u8bb2\uff0c\u4e00\u4e2a\u7ebf\u7a0b\u5360\u7528\u9501<\/code>\u7684\u65f6\u95f4\u76f8\u5bf9\u8f83\u77ed\uff0c\u4f46\u662f\u4e07\u4e00\u5360\u7528\u5f88\u957f\u65f6\u95f4\u600e\u4e48\u529e\uff1f\u8fd9\u6837\u4f1a\u5360\u7528\u5927\u91cfcpu\u65f6\u95f4\uff0c\u8fd9\u6837\u4f1a\u5bfc\u81f4\u6027\u80fd\u53d8\u5dee,\u6240\u4ee5\u57281.6\u5f15\u5165\u4e86\u81ea\u9002\u5e94\u81ea\u65cb\u9501<\/code>\u6765\u6ee1\u8db3\u8fd9\u6837\u7684\u573a\u666f\u3002<\/p>\n
\u90a3\u4e48\u4ec0\u4e48\u662f\u81ea\u9002\u5e94\u81ea\u65cb\u9501<\/code>\u5462\u2753\u81ea\u65cb\u7684\u6b21\u6570\u4e0d\u662f\u56fa\u5b9a\u7684\uff0c\u800c\u662f\u7531\u524d\u4e00\u6b21\u5728\u540c\u4e00\u4e2a\u9501\u4e0a\u7684\u81ea\u65cb\u65f6\u95f4\u53ca\u9501\u7684\u62e5\u6709\u8005\u7684\u72b6\u6001\u6765\u51b3\u5b9a\u3002\u5982\u679c\u6b64\u6b21\u81ea\u65cb\u6210\u529f\u4e86\uff0c\u5f88\u6709\u53ef\u80fd\u4e0b\u4e00\u6b21\u4e5f\u80fd\u6210\u529f\uff0c\u4e8e\u662f\u5141\u8bb8\u81ea\u65cb\u7684\u6b21\u6570\u5c31\u4f1a\u66f4\u591a\uff0c\u53cd\u8fc7\u6765\u8bf4\uff0c\u5982\u679c\u5f88\u5c11\u6709\u7ebf\u7a0b\u80fd\u591f\u81ea\u65cb\u6210\u529f\uff0c\u5f88\u6709\u53ef\u80fd\u4e0b\u4e00\u6b21\u4e5f\u662f\u5931\u8d25\uff0c\u5219\u81ea\u65cb\u6b21\u6570\u5c31\u66f4\u5c11\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5c31\u80fd\u591f\u66f4\u597d\u7684\u5229\u7528\u7cfb\u7edf\u8d44\u6e90\u3002<\/p>\n
<\/span>\u9501\u6d88\u9664<\/span><\/span><\/h3>\n
\u9501\u6d88\u9664\u662f\u4e00\u79cd\u9501\u7684\u4f18\u5316\u7b56\u7565\uff0c\u8fd9\u79cd\u4f18\u5316\u66f4\u52a0\u5f7b\u5e95\uff0c\u5728 JVM \u7f16\u8bd1\u65f6\uff0c\u901a\u8fc7\u5bf9\u8fd0\u884c\u4e0a\u4e0b\u6587\u7684\u626b\u63cf\uff0c\u53bb\u9664\u4e0d\u53ef\u80fd\u5b58\u5728\u5171\u4eab\u8d44\u6e90\u7ade\u4e89\u7684\u9501\u3002\u8fd9\u79cd\u4f18\u5316\u7b56\u7565\u53ef\u4ee5\u6d88\u9664\u6ca1\u6709\u5fc5\u8981\u7684\u9501\uff0c\u53bb\u9664\u83b7\u53d6\u9501\u7684\u65f6\u95f4\u3002<\/p>\n
<\/span>\u9501\u7c97\u5316<\/span><\/span><\/h3>\n
\u5982\u679c\u4e00\u7cfb\u5217\u7684\u8fde\u7eed\u52a0\u9501\u89e3\u9501\u64cd\u4f5c\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u6027\u80fd\u635f\u8017\uff0c\u6240\u4ee5\u5f15\u5165\u9501\u7c97\u5316\u7684\u6982\u5ff5\u3002\u610f\u601d\u662f\u5c06\u591a\u4e2a\u8fde\u7eed\u52a0\u9501\u3001\u89e3\u9501\u7684\u64cd\u4f5c\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u6269\u5c55\u6210\u4e3a\u4e00\u4e2a\u8303\u56f4\u66f4\u5927\u7684\u9501, \u8fd9\u4e2a\u5e94\u8be5\u5f88\u597d\u7406\u89e3<\/p>\n
<\/span>\u504f\u5411\u9501<\/span><\/span><\/h3>\n
\u504f\u5411\u9501<\/code>\u662fJDK 1.6\u5f15\u5165\u7684\uff0c\u5b83\u89e3\u51b3\u7684\u573a\u666f\u662f\u4ec0\u4e48\u5462\u2753\u6211\u4eec\u5927\u90e8\u5206\u4f7f\u7528\u9501\u90fd\u662f\u89e3\u51b3\u591a\u7ebf\u7a0b<\/code>\u573a\u666f\u4e0b\u7684\u95ee\u9898,\u4f46\u6709\u65f6\u5019\u5f80\u5f80\u4e00\u4e2a\u7ebf\u7a0b\u4e5f\u4f1a\u5b58\u5728\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u504f\u5411\u9501\u662f\u5728\u5355\u7ebf\u7a0b\u6267\u884c\u4ee3\u7801\u5757\u65f6\u4f7f\u7528\u7684\u673a\u5236\u3002<\/p>\n
\u9501\u7684\u4e89\u593a\u5b9e\u9645\u4e0a\u662f Monitor \u5bf9\u8c61\u7684\u4e89\u593a\uff0c\u8fd8\u6709\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u5bf9\u8c61\u5934\uff0c\u5bf9\u8c61\u5934\u662f\u7531 Mark Word \u548c Klass pointer<\/code> \u7ec4\u6210\u7684\u3002\u4e00\u65e6\u6709\u7ebf\u7a0b\u6301\u6709\u4e86\u8fd9\u4e2a\u9501\u5bf9\u8c61\uff0c\u6807\u5fd7\u4f4d\u4fee\u6539\u4e3a 1\uff0c\u5c31\u8fdb\u5165\u504f\u5411\u6a21\u5f0f\uff0c\u540c\u65f6\u4f1a\u628a\u8fd9\u4e2a\u7ebf\u7a0b\u7684 ID \u8bb0\u5f55\u5728\u5bf9\u8c61\u7684 Mark Word<\/code> \u4e2d\uff0c\u5f53\u540c\u4e00\u4e2a\u7ebf\u7a0b\u518d\u6b21\u8fdb\u5165\u65f6\uff0c\u5c31\u4e0d\u518d\u8fdb\u884c\u540c\u6b65\u64cd\u4f5c\uff0c\u5927\u5927\u51cf\u5c11\u4e86\u9501\u83b7\u53d6\u7684\u65f6\u95f4\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u6027\u80fd\u3002<\/p>\n
<\/span>\u8f7b\u91cf\u7ea7\u9501<\/span><\/span><\/h3>\n
\u6211\u4eec\u4e0a\u8fb9\u63d0\u5230\u7684\u504f\u5411\u9501<\/code>,\u5728\u591a\u7ebf\u7a0b\u60c5\u51b5\u4e0b\u5982\u679c\u504f\u5411\u9501\u5931\u8d25\u5c31\u4f1a\u5347\u7ea7\u4e3a\u8f7b\u91cf\u7ea7\u9501<\/code>\uff0c Mark Word \u7684\u7ed3\u6784\u4e5f\u53d8\u4e3a\u8f7b\u91cf\u7ea7\u9501\u7684\u7ed3\u6784\u3002<\/p>\n
\u6267\u884c\u540c\u6b65\u4ee3\u7801\u5757\u4e4b\u524d\uff0cJVM \u4f1a\u5728\u7ebf\u7a0b\u7684\u6808\u5e27\u4e2d\u521b\u5efa\u4e00\u4e2a\u9501\u8bb0\u5f55\uff08Lock Record\uff09\uff0c\u5e76\u5c06 Mark Word \u62f7\u8d1d\u590d\u5236\u5230\u9501\u8bb0\u5f55\u4e2d\u3002\u7136\u540e\u5c1d\u8bd5\u901a\u8fc7 CAS \u64cd\u4f5c\u5c06 Mark Word \u4e2d\u7684\u9501\u8bb0\u5f55\u7684\u6307\u9488\uff0c\u6307\u5411\u521b\u5efa\u7684 Lock Record\u3002\u5982\u679c\u6210\u529f\u8868\u793a\u83b7\u53d6\u9501\u72b6\u6001\u6210\u529f\uff0c\u5982\u679c\u5931\u8d25\uff0c\u5219\u8fdb\u5165\u81ea\u65cb\u83b7\u53d6\u9501<\/code>\u72b6\u6001\u3002<\/p>\n
\u5982\u679c\u81ea\u65cb\u9501<\/code>\u5931\u8d25,\u5c31\u4f1a\u5347\u7ea7\u4e3a\u91cd\u91cf\u7ea7\u9501<\/code>,\u4e5f\u5c31\u662f\u6211\u4eec\u4e4b\u524d\u8bb2\u7684\uff0c\u4f1a\u628a\u7ebf\u7a0b\u963b\u585e\uff0c\u9700\u7b49\u5f85\u5524\u9192\u3002<\/p>\n
<\/span>\u91cd\u91cf\u7ea7\u9501<\/span><\/span><\/h3>\n
\u5b83\u53c8\u79f0\u4e3a\u60b2\u89c2\u9501<\/code>, \u5347\u7ea7\u5230\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9501\u7ade\u4e89\u6bd4\u8f83\u6fc0\u70c8\uff0c\u5360\u7528\u65f6\u95f4\u4e5f\u6bd4\u8f83\u957f\uff0c\u4e3a\u4e86\u51cf\u5c11cpu\u7684\u6d88\u8017\uff0c\u4f1a\u5c06\u7ebf\u7a0b\u963b\u585e\uff0c\u8fdb\u5165\u963b\u585e\u961f\u5217\u3002<\/p>\n
synchronized<\/code>\u5c31\u662f\u901a\u8fc7\u9501\u5347\u7ea7\u7b56\u7565<\/code>\u6765\u9002\u5e94\u4e0d\u540c\u7684\u573a\u666f\uff0c\u6240\u4ee5\u73b0\u5728synchronized<\/code>\u88ab\u4f18\u5316\u7684\u5f88\u597d\uff0c\u4e5f\u662f\u6211\u4eec\u9879\u76ee\u4e2d\u5f80\u5f80\u90fd\u4f1a\u4f7f\u7528\u5b83\u7684\u7406\u7531\u3002<\/p>\n
<\/mp-miniprogram><\/p>\n
<\/span>\u7ed3\u675f\u8bed<\/span><\/span><\/h2>\n
\u672c\u8282\u7684\u5185\u5bb9\u6bd4\u8f83\u591a\uff0c\u5927\u5bb6\u597d\u597d\u7406\u89e3\uff0c\u7279\u522b\u662f\u9501<\/code>\u7684\u5347\u7ea7\u7b56\u7565\u3002\u672c\u8282\u6211\u4eec\u63d0\u5230\u4e86Lock<\/code>\u9501,\u4e0b\u4e00\u8282\uff0c\u5e26\u5927\u5bb6\u6df1\u5165\u5b66\u4e60\u4e00\u4e0bJava\u7684Lock<\/code> ~<\/p>\n
<\/span>\u5f80\u671f\u5185\u5bb9\u63a8\u8350<\/span><\/span><\/h2>\n