{"id":71829,"date":"2024-02-20T14:06:07","date_gmt":"2024-02-20T06:06:07","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=71829"},"modified":"2024-02-20T14:10:33","modified_gmt":"2024-02-20T06:10:33","slug":"java-%e5%a4%9a%e7%ba%bf%e7%a8%8b%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e5%9c%a8%e5%a4%9a-cpu-%e4%b8%8a%e5%88%86%e5%b8%83","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/71829.html","title":{"rendered":"Java \u591a\u7ebf\u7a0b\u5982\u4f55\u5b9e\u73b0\u5728\u591a CPU \u4e0a\u5206\u5e03"},"content":{"rendered":"

\"Java<\/p>\n

Java\u591a\u7ebf\u7a0b\u5728\u591aCPU\u4e0a\u5206\u5e03\u7684\u5173\u952e\u5728\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7684\u7ebf\u7a0b\u8c03\u5ea6\u3001Java\u865a\u62df\u673a\uff08JVM\uff09\u7684\u7ebf\u7a0b\u7ba1\u7406\u673a\u5236\u3001\u4ee5\u53ca\u7a0b\u5e8f\u5458\u7f16\u5199\u7684\u5e76\u884c\u7a0b\u5e8f\u4ee3\u7801<\/strong>\u3002\u64cd\u4f5c\u7cfb\u7edf\u8d1f\u8d23\u5206\u914d\u5904\u7406\u5668\u8d44\u6e90\uff0c\u5f53\u7a0b\u5e8f\u4f7f\u7528\u591a\u7ebf\u7a0b\u65f6\uff0cJVM\u4f1a\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u534f\u4f5c\uff0c\u5c06\u7ebf\u7a0b\u5206\u5e03\u5230\u591a\u4e2aCPU\u6838\u5fc3\u4e0a\u6267\u884c\uff0c\u4ee5\u63d0\u5347\u5e94\u7528\u7a0b\u5e8f\u7684\u5e76\u53d1\u6267\u884c\u6548\u7387\u3002\u6b64\u5916\uff0c\u7a0b\u5e8f\u5458\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5e76\u53d1\u5de5\u5177\u7c7b\u4ee5\u53ca\u7f16\u5199\u9ad8\u6548\u7684\u7ebf\u7a0b\u4ee3\u7801\u6765\u4f18\u5316\u7ebf\u7a0b\u5728CPU\u4e4b\u95f4\u7684\u5206\u5e03\u3002<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4f1a\u8be6\u7ec6\u63a2\u8ba8\u5728Java\u4e2d\u5b9e\u73b0\u591a\u7ebf\u7a0b\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u5982\u4f55\u6709\u6548\u5730\u5229\u7528\u591a\u6838CPU\u8d44\u6e90\u3002<\/p>\n

### \u4e00\u3001JAVA\u591a\u7ebf\u7a0b\u57fa\u7840<\/p>\n

\u5728Java\u4e2d\uff0c\u591a\u7ebf\u7a0b\u53ef\u4ee5\u901a\u8fc7\u7ee7\u627f`Thread`\u7c7b\u6216\u5b9e\u73b0`Runnable`\u63a5\u53e3\u6765\u5b9e\u73b0\u3002\u5f53\u4f60\u521b\u5efa\u4e00\u4e2a\u65b0\u7ebf\u7a0b\u5e76\u8c03\u7528\u5176`start()`\u65b9\u6cd5\u65f6\uff0cJava\u865a\u62df\u673a\u5c06\u8fd9\u4e00\u7ebf\u7a0b\u7684\u6267\u884c\u4ea4\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u7684\u7ebf\u7a0b\u8c03\u5ea6\u5668\u3002\u64cd\u4f5c\u7cfb\u7edf\u8d1f\u8d23\u5c06\u7ebf\u7a0b\u6620\u5c04\u5230\u67d0\u4e2aCPU\u6838\u5fc3\u4e0a\u5e76\u5206\u914d\u6267\u884c\u65f6\u95f4<\/strong>\u3002<\/p>\n

#### \u5b9e\u73b0Runnable\u63a5\u53e3<\/p>\n

\u5b9e\u73b0`Runnable`\u63a5\u53e3\u662f\u521b\u5efa\u7ebf\u7a0b\u7684\u63a8\u8350\u65b9\u5f0f\u3002\u4f60\u9700\u8981\u5b9e\u73b0`run`\u65b9\u6cd5\uff0c\u5e76\u5728\u8be5\u65b9\u6cd5\u4e2d\u5b9a\u4e49\u7ebf\u7a0b\u9700\u8981\u6267\u884c\u7684\u4ee3\u7801\u3002<\/p>\n

“`java<\/p>\n

public class MyRunnable implements Runnable {<\/p>\n

public void run() {<\/p>\n

\/\/ \u7ebf\u7a0b\u6267\u884c\u7684\u4ee3\u7801<\/p>\n

}<\/p>\n

}<\/p>\n

“`<\/p>\n

\u7136\u540e\uff0c\u4f60\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a`Thread`\u7c7b\u7684\u5b9e\u4f8b\u5e76\u4f20\u5165\u4f60\u7684`Runnable`\u5bf9\u8c61\uff1a<\/p>\n

“`java<\/p>\n

Thread thread = new Thread(new MyRunnable());<\/p>\n

thread.start(); \/\/ \u542f\u52a8\u7ebf\u7a0b<\/p>\n

“`<\/p>\n

#### \u7ee7\u627fThread\u7c7b<\/p>\n

\u53e6\u4e00\u79cd\u521b\u5efa\u7ebf\u7a0b\u7684\u65b9\u6cd5\u662f\u7ee7\u627f`Thread`\u7c7b\uff0c\u5e76\u8986\u76d6\u5176`run`\u65b9\u6cd5\u3002<\/p>\n

“`java<\/p>\n

public class MyThread extends Thread {<\/p>\n

@Override<\/p>\n

public void run() {<\/p>\n

\/\/ \u7ebf\u7a0b\u6267\u884c\u7684\u4ee3\u7801<\/p>\n

}<\/p>\n

}<\/p>\n

“`<\/p>\n

\u65b0\u5efa\u4e00\u4e2a`MyThread`\u7c7b\u7684\u5b9e\u4f8b\u5e76\u8c03\u7528`start`\u65b9\u6cd5\u6765\u542f\u52a8\u7ebf\u7a0b\uff1a<\/p>\n

“`java<\/p>\n

MyThread thread = new MyThread();<\/p>\n

thread.start(); \/\/ \u542f\u52a8\u7ebf\u7a0b<\/p>\n

“`<\/p>\n

### \u4e8c\u3001JVM\u7684\u7ebf\u7a0b\u7ba1\u7406<\/p>\n

JVM\u5728\u6267\u884cJava\u7a0b\u5e8f\u65f6\u4f1a\u5728\u5185\u90e8\u7ef4\u62a4\u4e00\u4e2a\u7ebf\u7a0b\u6c60\uff0cJVM\u7684\u7ebf\u7a0b\u8c03\u5ea6\u5668\u6839\u636e\u7ebf\u7a0b\u7684\u4f18\u5148\u7ea7\u548c\u72b6\u6001\uff0c\u51b3\u5b9a\u54ea\u4e9b\u7ebf\u800c\u5c06\u5728CPU\u4e0a\u6267\u884c<\/strong>\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5bf9\u4e8eJava\u5f00\u53d1\u8005\u6765\u8bf4\u662f\u900f\u660e\u7684\uff0c\u4f46\u662f\u7406\u89e3\u5b83\u53ef\u4ee5\u5e2e\u6211\u4eec\u66f4\u597d\u5730\u8bbe\u8ba1\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u3002<\/p>\n

#### \u7ebf\u7a0b\u4f18\u5148\u7ea7<\/p>\n

Java\u63d0\u4f9b\u4e86\u7ebf\u7a0b\u4f18\u5148\u7ea7\u7684\u6982\u5ff5\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u63d0\u793a\u54ea\u4e9b\u7ebf\u7a0b\u5e94\u8be5\u88ab\u4f18\u5148\u8c03\u5ea6\u3002\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528`Thread`\u7c7b\u7684`setPriority(int)`\u65b9\u6cd5\u6765\u8bbe\u7f6e\u7ebf\u7a0b\u7684\u4f18\u5148\u7ea7\u3002<\/p>\n

#### \u7ebf\u7a0b\u72b6\u6001<\/p>\n

\u7ebf\u7a0b\u5728JVM\u4e2d\u53ef\u4ee5\u5904\u4e8e\u4e0d\u540c\u7684\u72b6\u6001\uff0c\u5982\uff1a\u65b0\u5efa\uff08NEW\uff09\u3001\u53ef\u8fd0\u884c\uff08RUNNABLE\uff09\u3001\u963b\u585e\uff08BLOCKED\uff09\u3001\u7b49\u5f85\uff08WAI<\/a>TING\uff09\u3001\u5b9a\u65f6\u7b49\u5f85\uff08TIMED_WAITING\uff09\u548c\u7ec8\u6b62\uff08TERMINATED\uff09\u3002\u4e86\u89e3\u5404\u4e2a\u72b6\u6001\u7684\u542b\u4e49\uff0c\u5bf9\u4e8e\u7f16\u5199\u5e76\u53d1\u7a0b\u5e8f\u975e\u5e38\u91cd\u8981\u3002<\/p>\n

### \u4e09\u3001\u591a\u7ebf\u7a0b\u4e0e\u591aCPU\u7684\u5229\u7528<\/p>\n

\u57fa\u4e8e\u73b0\u4ee3\u64cd\u4f5c\u7cfb\u7edf\uff0cJava\u865a\u62df\u673a\u901a\u5e38\u4f1a\u5229\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684\u80fd\u529b\uff0c\u628a\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u4e2d\u7684\u7ebf\u800c\u5206\u914d\u5230\u591a\u4e2aCPU\u6216\u8005\u6838\u5fc3\u4e0a\u9762\u53bb\u3002\u7531\u4e8eJVM\u7684\u7ebf\u7a0b\u662f\u6620\u5c04\u5230\u64cd\u4f5c\u7cfb\u7edf\u7684\u539f\u751f\u7ebf\u7a0b\u4e0a\u7684\uff0c\u56e0\u6b64\u5728\u591a\u6838\u5904\u7406\u5668\u4e0a\uff0c\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u5b9e\u9645\u5e76\u884c\u6267\u884c\u3002<\/p>\n

#### \u7ebf\u7a0b\u7684\u5e76\u53d1\u6267\u884c<\/p>\n

\u5bf9\u4e8e\u591a\u6838CPU\u6765\u8bf4\uff0c\u771f\u6b63\u7684\u5e76\u884c\u53ea\u6709\u5728\u7ebf\u7a0b\u6570\u4e0d\u8d85\u8fc7CPU\u6838\u5fc3\u6570\u65f6\u624d\u53ef\u80fd\u5b9e\u73b0\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u5728\u4e0d\u540c\u7684CPU\u6838\u5fc3\u4e0a\u72ec\u7acb\u6267\u884c<\/strong>\u3002\u5982\u679c\u7ebf\u7a0b\u6570\u8d85\u8fc7CPU\u6838\u5fc3\u6570\uff0c\u7ebf\u7a0b\u4f1a\u5728\u6838\u5fc3\u4e4b\u95f4\u8fdb\u884c\u5207\u6362\uff0c\u7ed9\u4eba\u4ee5\u5e76\u884c\u7684\u9519\u89c9\u3002<\/p>\n

#### \u7ebf\u7a0b\u6c60<\/p>\n

\u5728Java\u4e2d\uff0c\u901a\u8fc7\u4f7f\u7528\u7ebf\u7a0b\u6c60\u6765\u7ba1\u7406\u548c\u590d\u7528\u7ebf\u7a0b\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u505a\u6cd5\u3002\u8fd9\u4e0d\u4ec5\u53ef\u4ee5\u964d\u4f4e\u7ebf\u7a0b\u521b\u5efa\u548c\u9500\u6bc1\u7684\u5f00\u9500\uff0c\u8fd8\u53ef\u4ee5\u66f4\u9ad8\u6548\u5730\u7ba1\u7406\u7ebf\u7a0b\u8d44\u6e90\u3002`Executor`\u6846\u67b6\u5728Java\u7684\u5e76\u53d1\u5305`java.util.concurrent`\u4e2d\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u7ebf\u7a0b\u6c60\u7ba1\u7406\u529f\u80fd\u3002<\/p>\n

### \u56db\u3001\u7f16\u5199\u9ad8\u6548\u7684\u5e76\u884c\u7a0b\u5e8f<\/p>\n

\u4e3a\u4e86\u8ba9Java\u7a0b\u5e8f\u66f4\u597d\u5730\u5229\u7528\u591aCPU\u7684\u4f18\u52bf\uff0c\u7f16\u5199\u7ebf\u7a0b\u5b89\u5168\u548c\u9ad8\u6548\u7684\u5e76\u884c\u7a0b\u5e8f\u4ee3\u7801\u662f\u5173\u952e\u3002\u7a0b\u5e8f\u5458\u9700\u8981\u501f\u52a9Java\u63d0\u4f9b\u7684\u5e76\u53d1\u5de5\u5177\u548c\u4f18\u5316\u6280\u5de7\uff0c\u4f7f\u5f97\u7a0b\u5e8f\u5728\u591a\u6838\u73af\u5883\u4e2d\u8868\u73b0\u66f4\u4f73\u3002<\/p>\n

#### \u907f\u514d\u7ebf\u7a0b\u51b2\u7a81<\/p>\n

\u5728\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u4e2d\uff0c\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168\u662f\u57fa\u672c\u539f\u5219\u3002\u4e3a\u4e86\u907f\u514d\u7ebf\u7a0b\u51b2\u7a81\uff0cJava\u63d0\u4f9b\u4e86\u540c\u6b65\u673a\u5236\uff0c\u5305\u62ec`synchronized`\u5173\u952e\u5b57\u548c`Lock`\u63a5\u53e3\u3002\u4f7f\u7528\u8fd9\u4e9b\u673a\u5236\u53ef\u4ee5\u4fdd\u62a4\u5171\u4eab\u8d44\u6e90\u4e0d\u4f1a\u88ab\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u3002<\/p>\n

#### \u5229\u7528\u5e76\u53d1\u96c6\u5408<\/p>\n

Java\u7684`java.util.concurrent`\u5305\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7ebf\u7a0b\u5b89\u5168\u7684\u5e76\u53d1\u96c6\u5408\uff0c\u5982`ConcurrentHashMap`\u3001`ConcurrentLinkedQueue`\u7b49\u3002\u4f7f\u7528\u8fd9\u4e9b\u5e76\u53d1\u96c6\u5408\u53ef\u4ee5\u5728\u4e0d\u727a\u7272\u6027\u80fd\u7684\u524d\u63d0\u4e0b\u63d0\u4f9b\u7ebf\u7a0b\u5b89\u5168\u7684\u8bbf\u95ee\u3002<\/p>\n

#### \u6700\u5c0f\u5316\u9501\u7684\u7ade\u4e89<\/p>\n

\u5c3d\u91cf\u51cf\u5c0f\u9501\u7684\u7c92\u5ea6\uff0c\u4f7f\u7528\u7ec6\u7c92\u5ea6\u9501\u6216\u8005\u9501\u5206\u5272\u6280\u672f\u6765\u964d\u4f4e\u9501\u7ade\u4e89\uff0c\u8fd9\u80fd\u591f\u663e\u8457\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n

### \u4e94\u3001\u603b\u7ed3<\/p>\n

Java\u591a\u7ebf\u7a0b\u5728\u591aCPU\u4e0a\u5206\u5e03\u662f\u7531JVM\u548c\u64cd\u4f5c\u7cfb\u7edf\u5171\u540c\u7ba1\u7406\u7684\uff0c\u7a0b\u5e8f\u5458\u901a\u8fc7\u5408\u7406\u8bbe\u8ba1\u548c\u7f16\u5199\u5e76\u53d1\u7a0b\u5e8f\u4ee3\u7801\uff0c\u53ef\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u5229\u7528\u591a\u6838CPU\u7684\u8ba1\u7b97\u80fd\u529b<\/strong>\u3002\u4e86\u89e3\u7ebf\u7a0b\u5728Java\u4e2d\u7684\u57fa\u672c\u6982\u5ff5\u3001JVM\u7684\u7ebf\u7a0b\u7ba1\u7406\u673a\u5236\u3001\u4ee5\u53ca\u591a\u7ebf\u7a0b\u7f16\u7a0b\u7684\u6700\u4f73\u5b9e\u8df5\u81f3\u5173\u91cd\u8981\u3002\u6b64\u5916\uff0c\u8003\u8651\u5230\u7a0b\u5e8f\u7684\u53ef\u6269\u5c55\u6027\u548c\u6027\u80fd\uff0c\u5408\u7406\u4f7f\u7528\u7ebf\u7a0b\u6c60\u548c\u5e76\u53d1\u96c6\u5408\uff0c\u4ee5\u53ca\u4f18\u5316\u9501\u7684\u4f7f\u7528\uff0c\u662f\u5b9e\u73b0\u9ad8\u6548\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u7684\u5173\u952e\u56e0\u7d20\u3002\u901a\u8fc7\u8fd9\u4e9b\u7b56\u7565\uff0c\u6211\u4eec\u53ef\u4ee5\u4e3a\u5e94\u7528\u7a0b\u5e8f\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u5e76\u5145\u5206\u5229\u7528\u73b0\u4ee3\u591a\u6838\u5904\u7406\u5668\u7684\u5f3a\u5927\u529f\u80fd\u3002<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u5982\u4f55\u5229\u7528Java\u591a\u7ebf\u7a0b\u5b9e\u73b0\u5728\u591aCPU\u4e0a\u5206\u5e03\uff1f<\/strong><\/p>\n

\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u7ebf\u7a0b\u6c60\u6765\u7ba1\u7406\u591a\u7ebf\u7a0b\u4efb\u52a1\uff0c\u5e76\u4e14\u5728\u591aCPU\u7cfb\u7edf\u4e0a\u5206\u5e03\u3002\u901a\u8fc7\u4f7f\u7528`Executors.newFixedThreadPool()`\u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u7ebf\u7a0b\u6c60\uff0c\u786e\u4fdd\u6240\u6709\u7684\u7ebf\u7a0b\u53ef\u4ee5\u5728\u591a\u6838CPU\u7cfb\u7edf\u4e0a\u5f97\u5230\u5145\u5206\u5229\u7528\u3002\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1\u4efb\u52a1\u5728\u591a\u4e2aCPU\u4e0a\u5206\u5e03\u6267\u884c\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u6548\u7387\u3002<\/p>\n

\u6709\u54ea\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u5e2e\u52a9Java\u591a\u7ebf\u7a0b\u5b9e\u73b0\u5728\u591aCPU\u4e0a\u7684\u5206\u5e03\uff1f<\/strong><\/p>\n

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