{"id":17598,"date":"2025-06-12T10:08:45","date_gmt":"2025-06-12T02:08:45","guid":{"rendered":"https:\/\/92it.top\/?p=17598"},"modified":"2025-06-12T10:08:45","modified_gmt":"2025-06-12T02:08:45","slug":"%e6%b7%b1%e5%ba%a6%e5%89%96%e6%9e%90%ef%bc%9ajava%e7%ba%bf%e7%a8%8b%e8%bf%90%e8%a1%8c%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=17598","title":{"rendered":"\u6df1\u5ea6\u5256\u6790\uff1aJava\u7ebf\u7a0b\u8fd0\u884c\u673a\u5236"},"content":{"rendered":"\n

\u8f6c\u8f7d\uff1a\u6df1\u5ea6\u5256\u6790\uff1aJava\u7ebf\u7a0b\u8fd0\u884c\u673a\u5236\uff0c\u7a0b\u5e8f\u5458\u5fc5\u770b\u7684\u77e5\u8bc6\u70b9\uff01<\/a><\/p>\n\n\n\n

\u5728 Java19 \u4e4b\u524d\uff0c\u7ebf\u7a0b\u662f Java \u8fd0\u884c\u7684\u6700\u5c0f\u5355\u5143\uff0c\u7ebf\u7a0b\u4f5c\u4e3a Java \u7684\u6838\u5fc3\u529f\u80fd\u4e4b\u4e00\uff0c\u5728 Java \u7684\u53d1\u5c55\u53f2\u4e0a\u8d77\u7740\u4e3e\u8db3\u8f7b\u91cd\u7684\u4f5c\u7528\uff0c\u56e0\u6b64\uff0c\u4eca\u5929\u6211\u4eec\u5c31\u6765\u804a\u804a Java \u7ebf\u7a0b\u7684\u76f8\u5173\u77e5\u8bc6\u3002<\/p>\n\n\n\n

\u7533\u660e\uff1a\u672c\u6587\u57fa\u4e8e jdk-11.0.15\uff0c\u64cd\u4f5c\u7cfb\u7edf\u57fa\u4e8e Linux\uff0cJVM \u57fa\u4e8e hotspot \u6e90\u7801\uff0chotspot \u6e90\u7801\u4e0b\u8f7d\u5730\u5740: https:\/\/github.com\/openjdk\/jdk<\/pre>\n\n\n\n
\u672c\u6587\u4f1a\u4ece \u7ebf\u7a0b\u5b9a\u4e49\u3001\u7ebf\u7a0b\u521b\u5efa\u3001\u7ebf\u7a0b\u72b6\u6001\u3001\u7ebf\u7a0b\u5de5\u4f5c\u539f\u7406\u3001\u7ebf\u7a0b\u7ec4\u3001\u7ebf\u7a0b\u4f18\u5148\u7ea7\u3001\u7ebf\u7a0b\u901a\u4fe1 7 \u4e2a\u90e8\u5206\u5bf9\u7ebf\u7a0b\u8fdb\u884c\u5168\u9762\u5206\u6790\u3002<\/p>\n\n\n\n
\u4e00\u3001\u4ec0\u4e48\u662f\u7ebf\u7a0b<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u7ef4\u57fa\u767e\u79d1\u4e2d\u6587\u7248\u5bf9\u7ebf\u7a0b\u7684\u89e3\u91ca\u5982\u4e0b\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u901a\u8fc7\u7ef4\u57fa\u767e\u79d1\u7684\u63cf\u8ff0\uff0c\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\u7ebf\u7a0b\u662f\u64cd\u4f5c\u7cfb\u7edf\u6267\u884c\u7684\u6700\u5c0f\u5355\u5143\uff0c\u4e00\u6761\u7ebf\u7a0b\u6307\u7684\u662f\u8fdb\u7a0b\u4e2d\u4e00\u4e2a\u5355\u4e00\u987a\u5e8f\u7684\u63a7\u5236\u6d41\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u4e2d\u53ef\u4ee5\u5e76\u53d1\u591a\u4e2a\u7ebf\u7a0b\uff0c\u6bcf\u6761\u7ebf\u7a0b\u5e76\u884c\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1\u3002\u5728 UnixSystem V \u53ca SunOS \u4e2d\u4e5f\u88ab\u79f0\u4e3a\u8f7b\u91cf\u8fdb\u7a0b\uff08lightweight processes\uff09\uff0c\u4f46\u8f7b\u91cf\u8fdb\u7a0b\u66f4\u591a\u6307\u5185\u6838\u7ebf\u7a0b\uff08kernel thread\uff09\uff0c\u800c\u628a\u7528\u6237\u7ebf\u7a0b\uff08userthread\uff09\u79f0\u4e3a\u7ebf\u7a0b\u3002<\/p>\n\n\n\n
\u90a3\u4e48\uff0cJava\u4e2d\u7684\u7ebf\u7a0b\u662f\u4ec0\u4e48\u5462\uff1f<\/p>\n\n\n\n
\u5728 Java \u4e2d\uff0c\u7ebf\u7a0b\u5bf9\u5e94\u7684\u662f java.lang.Thread \u7c7b\uff0c\u4e0b\u9762\u662f Thread \u7c7b\u7684\u6e90\u7801\u63cf\u8ff0\uff1a<\/p>\n\n\n\n
A thread is a thread of execution in a program. The Java Virtual Machine allows an application to have multiple threads of execution running concurrently.

Every thread has a priority. Threads with higher priority are executed in preference to threads with lower priority. Each thread may or may not also be marked as a daemon. When code running in some thread creates a new Thread object, the new thread has its priority initially set equal to the priority of the creating thread, and is a daemon thread if and only if the creating thread is a daemon.

When a Java Virtual Machine starts up, there is usually a single non-daemon thread (which typically calls the method named main of some designated class). The Java Virtual Machine continues to execute threads until either of the following occurs:

The exit method of class Runtime has been called and the security manager has permitted the exit operation to take place.

All threads that are not daemon threads have died, either by returning from the call to the run method or by throwing an exception that propagates beyond the run method.<\/pre>\n\n\n\n
\u56e0\u6b64\uff0c\u5728 Java \u4e2d\uff0c\u7ebf\u7a0b\u662f\u6307\u7a0b\u5e8f\u4e2d\u7684\u6267\u884c\u7ebf\u7a0b\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u4e00\u4e2a\u4f18\u5148\u7ea7\uff0c\u9ad8\u4f18\u5148\u7ea7\u7684\u7ebf\u7a0b\u6267\u884c\u8981\u4f18\u5148\u4e8e\u4f4e\u4f18\u5148\u7ea7\u7ebf\u7a0b\uff0c\u5728 Java \u865a\u62df\u673a\u4e2d\uff0c\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u540c\u65f6\u8fd0\u884c\u591a\u4e2a\u6267\u884c\u7ebf\u7a0b\uff0c\u5f53 JVM \u542f\u52a8\u65f6\uff0c\u901a\u5e38\u4f1a\u7ef4\u62a4\u4e00\u4e2a \u975e\u5b88\u62a4\u7ebf\u7a0b\uff08main \u65b9\u6cd5\u5bf9\u5e94\u7684\u7ebf\u7a0b\uff09\u3002<\/p>\n\n\n\n
\u4e8c\u3001\u7ebf\u7a0b\u521b\u5efa\u65b9\u5f0f<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u5728 Java \u4e2d\uff0c\u521b\u5efa\u7ebf\u7a0b\u6709 3 \u79cd\u65b9\u5f0f\uff1a\u7ee7\u627f Thread \u7c7b\u3001\u5b9e\u73b0 Runnable \u63a5\u53e3\u3001Callable\/Future\u3002<\/p>\n\n\n\n
2.1\u3001\u7ee7\u627f Thread \u7c7b<\/strong><\/p>\n\n\n\n
\u521b\u5efa\u7ebf\u7a0b\u7684\u7b2c\u4e00\u79cd\u65b9\u6cd5\u662f\u5c06\u7c7b\u58f0\u660e\u4e3a Thread \u7684\u5b50\u7c7b\u3002\u8be5\u5b50\u7c7b\u9700\u8981\u91cd\u5199 Thread \u7c7b\u7684 run()\u65b9\u6cd5\uff0c\u7136\u540e\u521b\u5efa\u5b50\u7c7b\u7684\u5b9e\u4f8b\uff0c\u6700\u540e\u8c03\u7528\u5b9e\u4f8b\u7684 start()\u65b9\u6cd5\u542f\u52a8\u7ebf\u7a0b\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
public class MyThread extends Thread {\n\n  @Override\n  public void run() {\n    System.out.println(\"MyThread extends Thread!\");\n  }\n\n  public static void main(String[] args) {\n    MyThread thread = new MyThread();\n    thread.start();\n  }\n}<\/pre>\n\n\n\n
\u4ee3\u7801\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
MyThread extends Thread!<\/pre>\n\n\n\n
2.2\u3001\u5b9e\u73b0 Runnable \u63a5\u53e3<\/strong><\/p>\n\n\n\n
\n\n\n\n
\u521b\u5efa\u7ebf\u7a0b\u7684\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u662f\u58f0\u660e\u4e00\u4e2a\u5b9e\u73b0 Runnable \u63a5\u53e3\u7684\u7c7b\u3002\u7136\u540e\u5728\u7c7b\u4e2d\u5b9e\u73b0 run()\u65b9\u6cd5\uff0c\u5e76\u4e14\u5c06\u8be5\u7c7b\u7684\u5b9e\u4f8b\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u4e00\u4e2a\u7ebf\u7a0b\u7c7b\uff0c\u6700\u540e\uff0c\u8c03\u7528 Thread.start()\u542f\u52a8\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
public class MyRunnable implements Runnable {\n\n  @Override\n  public void run() {\n    System.out.println(\"MyRunnable implements Runnable!\");\n  }\n\n  public static void main(String[] args) {\n    MyRunnable runnable = new MyRunnable();\n    Thread thread = new Thread(runnable);\n    thread.start();\n  }\n}<\/pre>\n\n\n\n
\u4ee3\u7801\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
MyRunnable implements Runnable!<\/pre>\n\n\n\n
2.3\u3001Callable\/Future<\/strong><\/p>\n\n\n\n
\u521b\u5efa\u7ebf\u7a0b\u7684\u7b2c\u4e09\u79cd\u65b9\u6cd5\u662f\u5b9e\u73b0 Callable \u63a5\u53e3\uff0c\u7136\u540e\u901a\u8fc7 Future \u83b7\u53d6\u7ed3\u679c\u503c\u3002\u4e00\u822c\u6765\u8bf4 Callable \u9700\u8981\u914d\u5408\u7ebf\u7a0b\u6c60\u5de5\u5177\u7c7b ExecutorService \u6765\u4f7f\u7528\uff0c\u5982\u4e0b\u4ee3\u7801\uff0c\u5b9a\u4e49\u4e00\u4e2a MyTask \u7c7b\uff0c\u7136\u540e\u8ba9\u8be5\u7c7b\u53bb\u5b9e\u73b0 Callable \u63a5\u53e3\uff0c\u5e76\u4e14\u5b9e\u73b0 call()\u65b9\u6cd5\uff0c\u6700\u540e\u901a\u8fc7 executor.submit()\u63d0\u4ea4\u4efb\u52a1\u3002<\/p>\n\n\n\n
public class MyThread implements Callable {\n  @Override\n  public Object call() throws Exception {\n    return \"MyThread implements Callable\";\n  }\n\n  public static void main(String[] args) throws Exception {\n    ExecutorService executor = Executors.newCachedThreadPool();\n    MyTask task = new MyTask();\n    Future<Integer> future = executor.submit(task);\n    \/\/ get()\u65b9\u6cd5\u4f1a\u963b\u585e\u5f53\u524d\u7ebf\u7a0b\uff0c\u76f4\u5230\u5f97\u5230\u7ed3\u679c\u3002\n    System.out.println(future.get());\n  }\n}<\/pre>\n\n\n\n
\u4ee3\u7801\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n
MyThread implements Callable!<\/pre>\n\n\n\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u770b\u770b Callable \u7684\u6e90\u7801\uff1a<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u901a\u8fc7 Callable \u7684\u6e90\u7801\u53ef\u4ee5\u5f97\u77e5\uff0c Callable \u662f\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u5e76\u4e14\u53ea\u6709\u4e00\u4e2a call() \u62bd\u8c61\u65b9\u6cd5\uff0cCallable \u63a5\u53e3\u4e0e Runnable \u7c7b\u4f3c\uff0c\u4e0d\u8fc7\uff0cRunnable \u4e0d\u8fd4\u56de\u7ed3\u679c\uff0c\u4e5f\u4e0d\u80fd\u629b\u51fa\u68c0\u67e5\u5f02\u5e38\u3002<\/p>\n\n\n\n
\u6211\u4eec\u518d\u770b\u4e0b Future.get()\u662f\u5982\u4f55\u83b7\u53d6\u6570\u636e\u7684\uff1f<\/p>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u901a\u8fc7\u6e90\u7801\u53ef\u4ee5\u770b\u51fa\uff0cget()\u662f\u4e00\u4e2a\u963b\u585e\u65b9\u6cd5\uff0c\u4f1a\u4e00\u76f4\u7b49\u5f85\u76f4\u5230\u5904\u7406\u5b8c\u6210\u8fd4\u56de\u7ed3\u679c\u6216\u8005\u7b49\u5f85\u8d85\u65f6\u4e2d\u65ad\u3002<\/p>\n\n\n\n
Thread\u3001Runnable\u3001Callable\/Future \u6bd4\u8f83<\/strong><\/p>\n\n\n\n
    \n
  • \u7531\u4e8e Java \u662f\u5355\u7ee7\u627f\uff0c\u56e0\u6b64 Runnable \u63a5\u53e3\u6bd4 Thread \u66f4\u7075\u6d3b\uff1b<\/li>\n\n\n\n
  • Runnable \u63a5\u53e3\u66f4\u7b26\u5408\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff1b<\/li>\n\n\n\n
  • Thread \u7c7b\u7684\u65b9\u6cd5\u6bd4\u8f83\u4e30\u5bcc\uff0c\u672c\u8eab\u4e5f\u5b9e\u73b0\u4e86 Runnable \u63a5\u53e3\uff0c\u800c Runnable \u63a5\u53e3\u66f4\u4e3a\u8f7b\u91cf\uff1b<\/li>\n\n\n\n
  • Thread\u3001Runnable \u90fd\u65e0\u6cd5\u8fd4\u56de\u503c\uff0cCallable\/Future \u53ef\u4ee5\u62ff\u5230\u7ebf\u7a0b\u6267\u884c\u7684\u7ed3\u679c\u503c\uff1b<\/li>\n\n\n\n
  • Future.get()\u662f\u901a\u8fc7\u963b\u585e\u65b9\u6cd5\u6765\u83b7\u53d6\u7ed3\u679c\u503c\uff1b<\/li>\n<\/ul>\n\n\n\n
    \u4e09\u3001\u7ebf\u7a0b\u7684\u72b6\u6001<\/strong><\/p>\n\n\n\n
    \n\n\n\n
    \u5728 Java \u4e2d\uff0c\u7ebf\u7a0b\u7684\u72b6\u6001\u4e5f\u53eb\u505a\u7ebf\u7a0b\u751f\u547d\u5468\u671f\uff0c\u4e3b\u8981\u6709 6 \u79cd\uff0c\u5176\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    public class Thread implements Runnable {\n  public enum State {  \n    NEW,\n    RUNNABLE,\n    BLOCKED,\n    WAITING,\n    TIMED_WAITING,\n    TERMINATED;\n  }\n}<\/pre>\n\n\n\n
    3.1\u3001NEW<\/strong><\/p>\n\n\n\n
    NEW\uff1a\u5c1a\u672a\u542f\u52a8\u7684\u7ebf\u7a0b\u5904\u4e8e\u6b64\u72b6\u6001\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u7684\u4ee3\u7801\u6765\u9a8c\u8bc1 NEW\uff1a<\/p>\n\n\n\n
    @Test\npublic void testStateNew(){ \n  Thread thread = new Thread(()->{});\n  System.out.println(thread.getState()); \/\/ \u8f93\u51fa NEW\n}<\/pre>\n\n\n\n
    3.2\u3001RUNNABLE<\/strong><\/p>\n\n\n\n
    RUNNABLE\uff1a\u5904\u4e8e RUNNABLE(\u53ef\u8fd0\u884c)\u72b6\u6001\u7684\u7ebf\u7a0b\u5728 Java \u865a\u62df\u673a\u4e2d\u6267\u884c\uff0c\u4f46\u5b83\u53ef\u80fd\u6b63\u5728\u7b49\u5f85\u6765\u81ea\u64cd\u4f5c\u7cfb\u7edf\u7684\u5176\u4ed6\u8d44\u6e90\uff0c\u4f8b\u5982\u5904\u7406\u5668\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u7684\u4ee3\u7801\u6765\u9a8c\u8bc1 RUNNABLE\uff1a<\/p>\n\n\n\n
    @Test\npublic void testStateNew(){\n  \/\/ \u53ea\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u5e76\u6ca1\u6709\u8c03\u7528 start()\u65b9\u6cd5\n  Thread thread = new Thread(()->{});\n  thread.start(); \n  System.out.println(thread.getState());  \/\/ \u8f93\u51fa RUNNABLE\n}<\/pre>\n\n\n\n
    3.3\u3001BLOCKED<\/strong><\/p>\n\n\n\n
    BLOCKED\uff1a\u5904\u4e8e\u963b\u585e\u72b6\u6001\u7684\u7ebf\u7a0b\u6b63\u5728\u7b49\u5f85\u76d1\u89c6\u5668\u9501\u8fdb\u5165\u540c\u6b65\u5757\/\u65b9\u6cd5\u6216\u8c03\u7528 Object.wait \u540e\u91cd\u65b0\u8fdb\u5165\u540c\u6b65\u5757\/\u65b9\u6cd5\u3002<\/p>\n\n\n\n
    3.4\u3001WAITING<\/strong><\/p>\n\n\n\n
    WAITING\uff1a\u7b49\u5f85\u72b6\u6001\u3002\u8c03\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff0c\u7ebf\u7a0b\u5c31\u4f1a\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\uff1a<\/p>\n\n\n\n
      \n
    • Object.wait()<\/li>\n\n\n\n
    • Thread.join()<\/li>\n\n\n\n
    • LockSupport.park()<\/li>\n<\/ul>\n\n\n\n
      \u5904\u4e8e WAITING \u7b49\u5f85\u72b6\u6001\u7684\u7ebf\u7a0b\uff0c\u9700\u8981\u5176\u4ed6\u7ebf\u7a0b\u5bf9\u5176\u5bf9\u8c61\u6267\u884c\u4e0b\u9762\u4efb\u4e00\u65b9\u6cd5\u624d\u80fd\u5207\u6362\u6210 RUNNABLE \u72b6\u6001\uff1a<\/p>\n\n\n\n
        <\/ul>\n\n\n\n
          \n
        • notify()<\/li>\n\n\n\n
        • notifyAll()<\/li>\n\n\n\n
        • LockSupport.unpark()<\/li>\n<\/ul>\n\n\n\n
          3.5\u3001TIMED_WAITING<\/strong><\/p>\n\n\n\n
          TIMED_WAITING\uff1a\u8d85\u65f6\u7b49\u5f85\u72b6\u6001\u3002\u7ebf\u7a0b\u7b49\u5f85\u7ed9\u5b9a\u7684\u65f6\u95f4\u540e\u4f1a\u88ab\u81ea\u52a8\u5524\u9192\u3002\u8c03\u7528\u4ee5\u4e0b\u65b9\u6cd5\u4f1a\u4f7f\u7ebf\u7a0b\u8fdb\u5165\u8d85\u65f6\u7b49\u5f85\u72b6\u6001\uff1a<\/p>\n\n\n\n
            \n
          • Thread.sleep(long millis)\uff1a\u4f7f\u5f53\u524d\u7ebf\u7a0b\u7761\u7720\u6307\u5b9a\u65f6\u95f4\uff1b<\/li>\n\n\n\n
          • Object.wait(long timeout)\uff1a\u7ebf\u7a0b\u4f11\u7720\u6307\u5b9a\u65f6\u95f4\uff0c\u7b49\u5f85\u671f\u95f4\u53ef\u4ee5\u901a\u8fc7 notify()\/notifyAll()\u5524\u9192\uff1b<\/li>\n\n\n\n
          • Thread.join(long millis)\uff1a\u7b49\u5f85\u5f53\u524d\u7ebf\u7a0b\u6700\u591a\u6267\u884c millis \u6beb\u79d2\uff0c\u5982\u679c millis \u4e3a 0\uff0c\u5219\u4f1a\u4e00\u76f4\u6267\u884c\uff1b<\/li>\n\n\n\n
          • LockSupport.parkNanos(long nanos)\uff1a\u9664\u975e\u83b7\u5f97\u8c03\u7528\u8bb8\u53ef\uff0c\u5426\u5219\u7981\u7528\u5f53\u524d\u7ebf\u7a0b\u8fdb\u884c\u7ebf\u7a0b\u8c03\u5ea6\u6307\u5b9a\u65f6\u95f4\uff1b<\/li>\n\n\n\n
          • LockSupport.parkUntil(long deadline)\uff1a\u540c\u4e0a\uff0c\u4e5f\u662f\u7981\u6b62\u7ebf\u7a0b\u8fdb\u884c\u8c03\u5ea6\u6307\u5b9a\u65f6\u95f4\uff1b<\/li>\n\n\n\n
          • <\/li>\n<\/ul>\n\n\n\n
            \u6211\u4eec\u901a\u8fc7\u4e0b\u9762\u7684\u4ee3\u7801\u6765\u9a8c\u8bc1\u72b6\u6001\uff1a<\/p>\n\n\n\n
            public class ThreadBlocked extends Thread {\n  @Override \n  public void run() { \n    while (true) {\n      try {\n        \/\/ \u7ebf\u7a0b\u8fdb\u5165 TIMED_WAITING \u72b6\u6001\n        TimeUnit.SECONDS.sleep(100);\n      } catch (InterruptedException e) { \n          e.printStackTrace();\n      }\n    }\n  }\n\n  public static void main(String[] args) {\n    Thread threadBlocked = new Thread(new ThreadBlocked(), \"ThreadBlocked\");\n    threadBlocked.start(); \n  }\n}<\/pre>\n\n\n\n
            \u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u8ba9\u7ebf\u7a0b sleep \u7761\u7720 100s\uff0c\u7136\u540e\u53ef\u4ee5\u901a\u8fc7 jstack pid \u6307\u4ee4\u67e5\u770b\u5806\u6808\u4fe1\u606f\uff0c\u4ece\u800c\u89c2\u6d4b\u7ebf\u7a0b\u72b6\u6001\uff1a<\/p>\n\n\n
            \n
            \"\"<\/figure><\/div>\n\n\n
            3.6\u3001TERMINATED<\/strong><\/p>\n\n\n\n
            TERMINATED\uff1a\u5df2\u7ec8\u6b62\u72b6\u6001\uff0c\u4ee3\u8868\u7ebf\u7a0b\u5df2\u5b8c\u6210\u6267\u884c\u3002<\/p>\n\n\n\n
            \u603b\u7ed3<\/strong><\/p>\n\n\n\n
            \u901a\u8fc7\u4e0a\u6587\u7684\u5206\u6790\uff0c\u6211\u4eec\u53ef\u4ee5\u628a Java\u7ebf\u7a0b\u7684 6 \u79cd\u72b6\u6001\u53ca\u5176\u8f6c\u6362\u5173\u7cfb\u603b\u7ed3\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n
            \n
            \"\"<\/figure><\/div>\n\n\n
            \u56db\u3001\u7ebf\u7a0b\u7684\u5de5\u4f5c\u539f\u7406<\/strong><\/p>\n\n\n\n
            \n\n\n\n
            4.1\u3001\u542f\u52a8\u7ebf\u7a0b<\/strong><\/p>\n\n\n\n
            \u5728\u4e0a\u6587\u793a\u4f8b\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7 Thread.start()\u65b9\u6cd5\u5c31\u80fd\u542f\u52a8\u7ebf\u7a0b\uff0c\u90a3\u4e48 start()\u65b9\u6cd5\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u5462\uff1f<\/p>\n\n\n\n
            \u9996\u5148\uff0c\u6211\u4eec\u6765\u5206\u6790 Thread\u548c Runnable\u7684\u6e90\u7801\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n
            \n
            \"\"<\/figure><\/div>\n\n
            \n
            \"\"<\/figure><\/div>\n\n\n
            \u901a\u8fc7 Runnable \u6e90\u7801\u53ef\u4ee5\u770b\u51fa\uff0cRunnable \u662f\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u5185\u90e8\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5 run()\uff0c\u4efb\u4f55\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u7ebf\u7a0b\u7c7b\u90fd\u5fc5\u987b\u5b9e\u73b0 run()\u65b9\u6cd5\uff0c\u800c Thread \u6e90\u7801\u663e\u793a\uff0cThread \u672c\u8eab\u5b9e\u73b0\u4e86 Runnable \u63a5\u53e3\uff0c\u5e76\u4e14\u5b9e\u73b0\u4e86 Runnable\u63a5\u53e3\u7684run()\u65b9\u6cd5\uff0cThread.start()\u6700\u7ec8\u8c03\u7528\u4e86native start0()\u65b9\u6cd5\uff0c\u4e5f\u5c31\u662f\u8bf4 start0()\u662f\u5728 JVM \u4e2d\u5b9e\u73b0\u7684\uff0c\u56e0\u6b64\uff0c\u7ee7\u7eed\u67e5\u9605 JVM \u7684\u6e90\u7801\uff0c\u770b\u770b start0()\u65b9\u6cd5\u5230\u5e95\u505a\u4e86\u4ec0\u4e48\u3002<\/p>\n\n\n\n
            \u4ece JVM\u7684Thread.c \u6e90\u7801\u53ef\u4ee5\u770b\u51fa\uff0cstart0()\u4f1a\u6620\u5c04\u5230 JVM \u4e2d\u7684 JVM_StartThread \u65b9\u6cd5\uff0c\u6620\u5c04\u5173\u7cfb\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n
            \n
            \"\"<\/figure><\/div>\n\n\n
            \u5728 jvm.cpp \u6e90\u7801\u4e2d\uff0cJVM_StartThread \u65b9\u6cd5\u6e90\u7801\u5b9e\u73b0\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n
            \n
            \"\"<\/figure><\/div>\n\n\n
            \u00a0\u901a\u8fc7\u6e90\u7801\uff0c\u53ef\u4ee5 JVM_StartThread \u5b9e\u73b0\u903b\u8f91\u603b\u7ed3\u4e3a\u4e0b\u5217\u6b65\u9aa4\uff1a<\/p>\n\n\n\n
              \n
            • 1. \u5224\u65ad Java \u7ebf\u7a0b\u662f\u5426\u5df2\u7ecf\u542f\u52a8\uff0c\u5982\u679c\u542f\u52a8\u8fc7\uff0c\u5219\u629b\u5f02\u5e38\uff1b<\/li>\n\n\n\n
            • 2. \u5982\u679c Java \u7ebf\u7a0b\u6ca1\u6709\u542f\u52a8\u8fc7\uff0c\u5219\u901a\u8fc7 new JavaThread()\u521b\u5efa Java \u7ebf\u7a0b\uff1b<\/li>\n\n\n\n
            • 3. \u8c03\u7528 Thread::start(native_thread); \u542f\u52a8\u6b65\u9aa4 2 \u521b\u5efa\u7684\u7ebf\u7a0b\uff1b<\/li>\n<\/ul>\n\n\n\n
              \u63a5\u4e0b\u6765\u8981\u5206\u6790JVM\u4e2d\u7ebf\u7a0b\u662f\u5982\u4f55\u521b\u5efa\u7684\uff0c\u6e90\u7801\u4f4d\u4e8e javaThread.cpp \u4e2d\uff0c\u901a\u8fc7 new JavaThread()\u521b\u5efa\u7ebf\u7a0b\u5b9e\u9645\u662f\u4f1a\u8c03\u7528 os::create_thread()\u65b9\u6cd5\u6765\u521b\u5efa Java \u7ebf\u7a0b\u5bf9\u5e94\u7684\u5185\u6838\u7ebf\u7a0b\uff0c\u5176\u6e90\u7801\u622a\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              os::create_thread()\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u5462\uff1f\u6211\u4eec\u5c06\u76ee\u5149\u8f6c\u5411\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u6e90\u7801\uff0c\u8fd9\u91cc\u4ee5Linux\u5185\u6838\u7684os_linux.cpp \u6e90\u7801\u4e3a\u4f8b\uff0cos::create_thread() \u662f\u5229\u7528 pthread_create()\u6765\u521b\u5efa\u5185\u6838\u7ebf\u7a0b\uff0c\u65b9\u6cd5\u5171 4 \u4e2a\u53c2\u6570\u3002<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u5230\u6b64\uff0c\u7ebf\u7a0b\u5df2\u7ecf\u521b\u5efa\u5b8c\u6210\uff0c\u63a5\u4e0b\u6765\u5c31\u662f\u5982\u4f55\u542f\u52a8\u7ebf\u7a0b\uff0c\u5728 JVM\u4e2d\u8c03\u7528 \u7684\u662fThread::start(native_thread)\uff0cstart()\u65b9\u6cd5\u4f1a\u8c03\u7528\u5e73\u53f0\u542f\u52a8\u7ebf\u7a0b\u7684\u65b9\u6cd5: os::start_thread(thread);\uff0c\u6700\u7ec8\u8f6c\u5411 thread.cpp \u6587\u4ef6\u4e2d\u7684 JavaThread::run()\u65b9\u6cd5\uff0c\u6e90\u7801\u622a\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u5728 thread.cpp \u6e90\u7801\u4e2d\uff0cthread->call_run() \u8c03\u7528\u4e86 thread_main_inner()\u3002<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u5728 javaThread.cpp \u6e90\u7801\u4e2d\uff0cthread_main_inner()\u65b9\u6cd5\u4e2d\u7684 this->entry_point(this, this)\u8fd4\u56de\u7684\u5176\u5b9e\u5c31\u662f\u5728 new JavaThread(&thread_entry, sz) \u65f6\u4f20\u5165\u7684 thread_entry\u3002\u56e0\u6b64\uff0cthread_main_inner()\u5c31\u76f8\u5f53\u4e8e\u8c03\u7528\u4e86 thread_entry(this\uff0cthis)\u3002<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u5728 jvm.cpp \u6e90\u7801\u4e2d\uff0cthread_entry \u65b9\u6cd5\u4e2d\uff0cJVM \u901a\u8fc7 JavaCalls \u6a21\u5757\u8c03\u7528 call_virtual\u65b9\u6cd5\uff0c\u800c JavaCalls \u662f C++\u8c03\u7528 Java\u4ee3\u7801\u7684\u4e00\u4e2a\u529f\u80fd\u6a21\u5757\uff0c\u6240\u4ee5\uff0c\u901a\u8fc7JavaCalls\u6a21\u5757\u6700\u540e\u80fd\u8c03\u7528\u5230 Java \u4e2d\u7684 run()\u65b9\u6cd5\uff0c\u6e90\u7801\u622a\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u901a\u8fc7\u4e0a\u6587\u5bf9 JDK \u548c JVM \u7684\u6e90\u7801\u5206\u6790\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\uff1astart()\u65b9\u6cd5\u5148\u662f JDK\u901a\u8fc7 JNI\u7684\u65b9\u5f0f\u8c03\u7528 JVM\u672c\u5730C++\u65b9\u6cd5\uff0c\u7136\u540e JVM \u518d\u548c os\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u4ea4\u4e92\uff0c\u6700\u540e JVM \u518d\u56de\u8c03 Java\u7684run()\u65b9\u6cd5\uff0c\u5b8c\u6210\u4e86\u6574\u4e2a\u6267\u884c\u8fc7\u7a0b\uff0c\u6574\u4e2a\u8fc7\u7a0b\u6574\u7406\u6210\u4e0b\u56fe\uff1a<\/p>\n\n\n
              \n
              \"\"<\/figure><\/div>\n\n\n
              \u4e0a\u6587\u63cf\u8ff0\u4e86\u7ebf\u7a0b\u7684\u542f\u52a8\u8fc7\u7a0b\uff0c\u90a3\u4e48\uff0c\u7ebf\u7a0b\u662f\u5982\u4f55\u505c\u6b62\u7684\u5462\uff1f<\/strong><\/p>\n\n\n\n
              4.2\u3001\u505c\u6b62\u7ebf\u7a0b<\/strong><\/p>\n\n\n\n
              \u8bf4\u8d77\u505c\u6b62\u7ebf\u7a0b\uff0c\u60f3\u5fc5\u5927\u5bb6\u5f88\u81ea\u7136\u4f1a\u60f3\u5230 Thread.stop() \u6216\u8005 Thread.suspend()\uff0c\u4e0d\u8fc7\uff0c\u5f88\u9057\u61be\u7684\u662f\uff0cThread.stop() \u548c Thread.suspend()\u4ece JDK 1.2\u5c31\u5df2\u7ecf\u88ab\u5e9f\u5f03\u4e86\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u5b89\u5168\uff0c\u4f7f\u7528\u5b83\u4eec\u6765\u505c\u6b62\u7ebf\u7a0b\u4f1a\u5bfc\u81f4\u5df2\u9501\u5b9a\u7684\u76d1\u89c6\u5668\u4f1a\u88ab\u89e3\u9501\uff0c\u56e0\u6b64\u63a8\u8350\u4f7f\u7528 Thread.interrupt()\u6765\u4e2d\u65ad\u7ebf\u7a0b\u3002<\/p>\n\n\n\n
              \u4f7f\u7528 interrupt()\u65b9\u6cd5\u6709\u4e24\u4e2a\u91cd\u8981\u4f5c\u7528\uff1a<\/p>\n\n\n\n
                \n
              • \u8bbe\u7f6e\u4e00\u4e2a\u7ebf\u7a0b\u7ec8\u6b62\u7684\u6807\u8bb0\uff08\u5171\u4eab\u53d8\u91cf\u7684\u503c true\uff09<\/li>\n\n\n\n
              • \u5524\u9192\u5904\u4e8e\u963b\u585e\u72b6\u6001\u4e0b\u7684\u7ebf\u7a0b<\/li>\n<\/ul>\n\n\n\n
                \u5982\u4e0b\u4ee3\u7801\uff0c\u5728 run()\u65b9\u6cd5\u4e2d\u8ba9\u7ebf\u7a0b\u7761\u7720 300s\uff0c\u7136\u540e\u5728\u7ebf\u7a0b\u7761\u7720\u8fc7\u7a0b\u4e2d\u8c03\u7528\u7ebf\u7a0b\u4e2d\u65ad\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
                public class MyThread extends Thread {\n    public static void main(String[] args) {\n        MyThread thread = new MyThread();\n        thread.start();\n        \/\/ \u8c03\u7528interrupt\n        thread.interrupt();\n    }\n\n    @Override\n    public void run() {\n        try {\n            TimeUnit.SECONDS.sleep(300);\n        } catch (InterruptedException e) {\n            \/\/ \u6253\u5370\u51fa java.lang.InterruptedException: sleep interrupted\n            e.printStackTrace(); \n        }\n    }\n}<\/pre>\n\n\n\n
                \u6267\u884c\u4e0a\u8ff0\u4ee3\u7801\uff0c\u53ef\u4ee5\u53d1\u73b0\u7ebf\u7a0b\u88ab\u6b63\u5e38\u4e2d\u65ad\uff0ccatch\u4e2d\u4f1a\u6253\u5370\u51fa\u4ee5\u4e0b\u5806\u6808\u4fe1\u606f\uff1ajava.lang.InterruptedException: sleep interrupted<\/p>\n\n\n\n
                \u90a3\u4e48\uff0cThread.interrupt() \u662f\u5982\u4f55\u4e2d\u65ad\u7ebf\u7a0b\u7684\uff1f<\/p>\n\n\n\n
                \u6211\u4eec\u4ece Thread.interrupt() \u8fdb\u884c\u5206\u6790\uff0c\u53d1\u73b0 interrupt()\u8c03\u7528\u4e86 native interrupt0()\uff0c\u4ece\u800c\u8f6c\u5411\u4e86 JVM\u7684\u5b9e\u73b0\uff0cinterrupt()\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n
                \n
                \"\"<\/figure><\/div>\n\n\n
                \u5728 JVM \u7684 Thread.c \u6e90\u7801\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230 interrupt0()\u6620\u5c04\u5230 JVM_Interrupt\u65b9\u6cd5\uff0c\u6e90\u7801\u622a\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n
                \n
                \"\"<\/figure><\/div>\n\n\n
                \u63a5\u7740\u6211\u4eec\u8fdb\u5165 JVM_Interrupt \u65b9\u6cd5\u7684\u6e90\u7801\u7c7bjvm.cpp\uff0c \u5728 JVM_Interrupt\u4e2d\u4f1a\u5224\u65ad\u7ebf\u7a0b\u662f\u5426\u5b58\u6d3b\uff0c\u5982\u679c\u5b58\u6d3b\uff0c\u624d\u4f1a\u8c03\u7528 JavaThread.interrupt()\u65b9\u6cd5\u8fdb\u884c\u7ebf\u7a0b\u4e2d\u65ad\u64cd\u4f5c\uff0c\u5426\u5219\u76f4\u63a5\u7ed3\u675f\u65b9\u6cd5\uff0c\u6e90\u7801\u622a\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n
                \n
                \"\"<\/figure><\/div>\n\n\n
                \u6700\u540e\uff0c\u6211\u4eec\u8fdb\u5165 javaThread.cpp \uff0cinterrupt() \u65b9\u6cd5\u9488\u5bf9\u7ebf\u7a0b\u4e0d\u540c\u7684\u72b6\u6001\uff0c\u4f1a\u91c7\u53d6\u76f8\u5e94\u7684\u65b9\u6cd5\u6765\u8fdb\u884c\u4e2d\u65ad\uff0c\u5177\u4f53\u5b9e\u73b0\u903b\u8f91\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n
                \n
                \"\"<\/figure><\/div>\n\n\n
                \u4e3a\u4ec0\u4e48interrupt()\u65b9\u6cd5\u9700\u8981\u4f7f\u7528 unpark()\u5462\uff1f\u8fd9\u662f\u56e0\u4e3a\u5728\u6f14\u793a\u4ee3\u7801\u4e2d\u4f7f\u7528\u7684\u662fThread.sleep()\u65b9\u6cd5\u8fdb\u884c\u7ebf\u7a0b\u7761\u7720\uff0c\u800c sleep()\u6700\u7ec8\u4f1a\u8c03\u7528park \u51fd\u6570\uff0c\u6e90\u7801\u622a\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n
                \n
                \"\"<\/figure><\/div>\n\n
                \n
                \"\"<\/figure><\/div>\n\n\n
                \u6240\u4ee5 interrupt()\u9700\u8981\u4f7f\u7528unpark()\u5524\u9192\u7761\u7720\u7684\u7ebf\u7a0b\uff0cpark()\u65b9\u6cd5\u5176\u5b9e\u662f\u8c03\u7528\u7cfb\u7edf\u5c42\u9762\u7684\u9501\u6302\u8d77\u7ebf\u7a0b\uff0c\u800cunpark()\u65b9\u6cd5\u8c03\u7528\u7cfb\u7edf\u5c42\u9762\u7684\u5524\u9192\u6761\u4ef6\u53d8\u91cf\u8fbe\u5230\u5524\u9192\u7ebf\u7a0b\u7684\u76ee\u7684\uff0cSleep()\u65b9\u6cd5\u68c0\u6d4b\u5230\u7ebf\u7a0b\u4e2d\u65ad\u6807\u8bc6\uff0c\u629b\u51fa sleep interrupted\u5f02\u5e38\u3002<\/p>\n\n\n
                \n
                \"\"<\/figure><\/div>\n\n\n
                4.3\u3001start() \u548c run()\u6bd4\u8f83<\/strong><\/p>\n\n\n\n
                start()\u548c run()\u65b9\u6cd5\u662f\u5b9e\u9645\u5de5\u4f5c\u4e2d\u6bd4\u8f83\u5bb9\u6613\u641e\u6df7\u7684\u4e24\u4e2a\u65b9\u6cd5\uff0c\u56e0\u6b64\u8fd9\u91cc\u7279\u522b\u62ff\u51fa\u6765\u8fdb\u884c\u6bd4\u8f83\uff0c\u6211\u4eec\u5148\u770b\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/pre>\n\n\n\n
                public class MyThread extends Thread {\n  @Override\n  public void run() {\n    System.out.println(\"ThreadName:\" + Thread.currentThread().getName());\n  }\n\n  public static void main(String[] args) {\n    MyThread thread = new MyThread();\n    thread.run();   \/\/ \u8f93\u51fa ThreadName:main\n    thread.run();   \/\/ \u8f93\u51fa ThreadName:main\n    thread.start(); \/\/ \u8f93\u51fa ThreadName:Thread-0\n    thread.start(); \/\/ \u629b\u51fa java.lang.IllegalThreadStateException \u5f02\u5e38\n  }\n}<\/pre>\n\n\n\n
                \u901a\u8fc7\u4e0a\u9762\u7684\u4ee3\u7801\u6267\u884c\u7ed3\u679c\u6211\u4eec\u53ef\u4ee5\u5f97\u51fa\uff1a<\/p>\n\n\n\n
                  \n
                • start(): \u4f1a\u542f\u52a8\u4e00\u4e2a\u65b0\u7ebf\u7a0b\uff0c\u5728\u65b0\u7ebf\u7a0b\u91cc\u4f1a\u6267\u884c\u76f8\u5e94\u7684 run()\u65b9\u6cd5\uff1bstart()\u4e0d\u80fd\u88ab\u91cd\u590d\u8c03\u7528\uff0cJVM\u6e90\u7801\u4f1a\u5224\u65ad\u7ebf\u7a0b\u662f\u5426\u5df2\u7ecf\u542f\u52a8\u8fc7\u3002<\/li>\n\n\n\n
                • run() : \u76f4\u63a5\u8c03\u7528\u5b9e\u4f8b\u7684 run()\u65b9\u6cd5\uff0c run()\u5c31\u662f\u4e00\u4e2a\u666e\u901a\u65b9\u6cd5\uff0c\u4e0d\u4f1a\u542f\u52a8\u65b0\u7ebf\u7a0b\uff0c\u800c\u662f\u76f4\u63a5\u5728\u5f53\u524d\u7ebf\u7a0b\u4e2d\u6267\u884c\uff1brun()\u53ef\u91cd\u590d\u8c03\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
                  \u65b9\u6cd5<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
                  native void yield()<\/td>\u5f53\u524d\u7ebf\u7a0b\u5c06\u653e\u5f03\u5bf9\u5904\u7406\u5668\u7684\u4f7f\u7528\uff0c\u4e00\u822c\u8c03\u8bd5\u548c\u6d4b\u8bd5\u4e2d\u6bd4\u8f83\u5e38\u7528<\/td><\/tr>
                  native void sleep()<\/td>\u7ebf\u7a0b\u7761\u7720\u6307\u5b9a\u7684\u65f6\u957f\uff0c\u7ebf\u7a0b\u4e0d\u4f1a\u91ca\u653e\u5bf9\u76d1\u89c6\u5668\u7684\u6240\u6709\u6743<\/td><\/tr>
                  synchronizedvoid join()<\/td>\u6700\u591a\u7b49\u5f85\u6307\u5b9a\u6beb\u79d2\u540e\u8ba9\u7ebf\u7a0b\u7ec8\u6b62\u30020\uff1a\u6c38\u8fdc\u7b49\u5f85<\/td><\/tr>
                  void setDaemon()<\/td>\u7528\u5c06\u7ebf\u7a0b\u8bbe\u7f6e\u4e3a\u5b88\u62a4\u7ebf\u7a0b\u6216\u7528\u6237\u7ebf\u7a0b\uff0c\u9700\u5728\u7ebf\u7a0b\u542f\u52a8\u524d\u8bbe\u7f6e<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                  \u5bf9\u7167 JVM\u6e90\u7801\u53ef\u4ee5\u53d1\u73b0\uff0c\u5728 Thread\u7c7b\u4e2d\u7684\u5f88\u591a\u65b9\u6cd5\u6700\u7ec8\u90fd\u4f1a\u6620\u5c04\u5230 JVM\u5185\u90e8\u7684 C++\u65b9\u6cd5\uff0c\u751a\u81f3\u8fd8\u9700\u8981\u548c OS\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n\n\n\n
                  \u4e94\u3001Java\u7ebf\u7a0b\u7ec4<\/strong><\/p>\n\n\n\n
                  \n\n\n\n
                  ThreadGroup\uff1a\u7ebf\u7a0b\u7ec4\uff0c\u5728 Java\u4e2d\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u5fc5\u987b\u5c5e\u4e8e\u4e00\u4e2a\u7ec4\uff0c\u4e0d\u80fd\u72ec\u7acb\u5b58\u5728\uff0c\u5982\u679c\u5728 new Thread()\u65f6\u6ca1\u6709\u663e\u5f0f\u6307\u5b9a\u7ebf\u7a0b\u7ec4\uff0c\u90a3\u4e48\u9ed8\u8ba4\u5c06\u7236\u7ebf\u7a0b\uff08\u5f53\u524d\u6267\u884cnew Thread()\u7684\u7ebf\u7a0b\uff09\u7ebf\u7a0b\u7ec4\u8bbe\u7f6e\u4e3a\u81ea\u5df1\u7684\u7ebf\u7a0b\u7ec4\u3002public static void main(String[] args)\u65b9\u6cd5\u7684\u7ebf\u7a0b\u7ec4\u9ed8\u8ba4\u4e3a main\u3002<\/p>\n\n\n\n
                  \u6211\u4eec\u4ee5\u4e00\u4e2a\u5b9e\u4f8b\u6765\u611f\u53d7\u4e0b\u7ebf\u7a0b\u7ec4\uff0c\u5982\u4e0b\u4ee3\u7801\uff0c\u5b9a\u4e49\u4e00\u4e2a\u7ebf\u7a0b\u7c7b\uff0c\u7136\u540e\u83b7\u53d6\u7ebf\u7a0b\u5bf9\u5e94\u7684\u7ebf\u7a0b\u7ec4\u540d\u79f0\u3002<\/p>\n\n\n\n
                  public class MyThread extends Thread { \n  @Override\n  public void run() { \n    System.out.println(\"MyThread extends Thread!\"); \n  }\n\n  public static void main(String[] args) { \n    MyThread thread = new MyThread(); \n    thread.start(); \n    \/\/ \u8f93\u51fa threadGroup:main \n    System.out.println(\"threadGroup:\" + thread.getThreadGroup().getName()); \n  }\n}<\/pre>\n\n\n\n
                  \u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5e76\u6ca1\u6709\u7ed9 MyThread\u7ebf\u7a0b\u5b9e\u4f8b\u8bbe\u7f6e\u8fc7\u7ebf\u7a0b\u7ec4\u4fe1\u606f\uff0c\u90a3\u4e48\uff0c\u83b7\u53d6\u5230\u7684\u7ebf\u7a0b\u7ec4\u662f\u5728\u4ec0\u4e48\u65f6\u5019\u8bbe\u7f6e\u7684\u5462\uff1f<\/p>\n\n\n\n
                  \u9996\u5148\uff0c\u770b\u770b Thread\u7c7b\u5728\u521b\u5efa\u7ebf\u7a0b\u5b9e\u4f8b\u65f6\u505a\u4e86\u4ec0\u4e48\uff0c\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  public class Thread implements Runnable {\n    \/\/ \u65e0\u53c2\u6784\u9020\u5668 \u521b\u5efa\u7ebf\u7a0b\n  public Thread() {\n    this(null, null, \"Thread-\" + nextThreadNum(), 0);\n  }\n\n  \/\/ \u6307\u5b9a\u7ebf\u7a0b\u7ec4\uff0cRunnable\u548c\u7ebf\u7a0b\u540d\u6765 \u521b\u5efa\u7ebf\u7a0b\n  public Thread(ThreadGroup group, Runnable target, String name, long stackSize) {\n    this(group, target, name, stackSize, null, true);\n  }\n\n  \/\/ \u6700\u5e95\u5c42\u7ebf\u7a0b\u521b\u5efa\u903b\u8f91\n  private Thread(ThreadGroup g, Runnable target, String name,\n                 long stackSize, AccessControlContext acc,\n                 boolean inheritThreadLocals) {\n    if (name == null) {\n      throw new NullPointerException(\"name cannot be null\");\n    }\n\n    this.name = name;\n\n    Thread parent = currentThread();\n    SecurityManager security = System.getSecurityManager();\n    if (g == null) {\n      \/* Determine if it's an applet or not *\/\n\n            \/* If there is a security manager, ask the security manager\n               what to do. *\/\n      if (security != null) {\n        g = security.getThreadGroup();\n      }\n\n            \/* If the security manager doesn't have a strong opinion\n               on the matter, use the parent thread group.\n              \u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u6ca1\u6709\u8bbe\u7f6e\u7ec4\uff0c\u5219\u83b7\u53d6\u7236\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u7ec4\n               *\/\n      if (g == null) {\n        g = parent.getThreadGroup();\n      }\n      \/* checkAccess regardless of whether or not threadgroup is\n           explicitly passed in. *\/\n      g.checkAccess();\n\n      \/*\n       * Do we have the required permissions?\n       *\/\n      if (security != null) {\n        if (isCCLOverridden(getClass())) {\n          security.checkPermission(\n            SecurityConstants.SUBCLASS_IMPLEMENTATION_PERMISSION);\n        }\n      }\n\n      g.addUnstarted();\n\n      this.group = g;\n      this.daemon = parent.isDaemon();\n      this.priority = parent.getPriority();\n      if (security == null || isCCLOverridden(parent.getClass()))\n        this.contextClassLoader = parent.getContextClassLoader();\n      else\n        this.contextClassLoader = parent.contextClassLoader;\n      this.inheritedAccessControlContext =\n        acc != null ? acc : AccessController.getContext();\n      this.target = target;\n      setPriority(priority);\n      if (inheritThreadLocals && parent.inheritableThreadLocals != null)\n        this.inheritableThreadLocals =\n          ThreadLocal.createInheritedMap(parent.inheritableThreadLocals);\n      \/* Stash the specified stack size in case the VM cares *\/\n      this.stackSize = stackSize;\n\n      \/* Set thread ID *\/\n      this.tid = nextThreadID();\n    }\n  }\n}<\/pre>\n\n\n\n
                  \u901a\u8fc7Thread\u6e90\u7801\u53ef\u4ee5\u770b\u51fa\uff0c\u5982\u679c\u521b\u5efa\u7ebf\u7a0b\u65f6\u672a\u6307\u5b9a\u7ebf\u7a0b\u7ec4\uff0c\u90a3\u4e48\u4f1a\u5c06\u7236\u7c7b\u7684\u7ebf\u5c42\u7ec4\u4fe1\u606f\u8bbe\u7f6e\u4e3a\u81ea\u5df1\u7684\u7ebf\u7a0b\u7ec4\uff0c\u63a5\u7740\u5c31\u6765\u770b\u4e0b ThreadGroup\u6e90\u7801\u7c7b\uff1a<\/p>\n\n\n
                  \n
                  \"\"<\/figure><\/div>\n\n\n
                  \u901a\u8fc7\u6e90\u7801\u7684\u63cf\u8ff0\u53ef\u4ee5\u5f97\u77e5\uff1aThreadGroup\uff08\u7ebf\u7a0b\u7ec4\uff09\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u7ebf\u7a0b\u7684\u96c6\u5408\uff0c\u5b83\u662f\u4e00\u4e2a\u6811\u5f62\u7ed3\u6784\uff0c\u5e76\u5448\u7236\u5b50\u5173\u7cfb\uff0c\u9664\u4e86 system \u7ebf\u7a0b\u7ec4\uff08\u53ea\u6709\u5b50\u7ebf\u7a0b\u7ec4\uff09\uff0c\u4e00\u4e2a\u7ebf\u7a0b\u7ec4\u65e2\u53ef\u4ee5\u6709\u7236\u7ebf\u7a0b\u7ec4\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u6709\u5b50\u7ebf\u7a0b\u7ec4\u3002\u4f46\u662f\uff0c\u7ebf\u7a0b\u53ea\u80fd\u8bbf\u95ee\u672c\u7ebf\u7a0b\u7ec4\u7684\u4fe1\u606f\uff0c\u4e0d\u80fd\u8bbf\u95ee\u5176\u7236\u7c7b\u6216\u8005\u5176\u4ed6\u7ebf\u7a0b\u7ec4\u7684\u4fe1\u606f\u3002\u5728 Java \u4e2d\u7ebf\u7a0b\u7ec4\u7684\u6811\u72b6\u7ed3\u6784\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n
                  \n
                  \"\"<\/figure><\/div>\n\n\n
                    \n
                  • system \u7ebf\u7a0b\u7ec4\uff0c\u5b83\u662f\u7528\u6765\u5904\u7406 JVM \u7cfb\u7edf\u4efb\u52a1\u7684\u7ebf\u7a0b\u7ec4\uff0c\u6bd4\u5982\u5bf9\u8c61\u9500\u6bc1\u7b49\uff1b<\/li>\n\n\n\n
                  • main \u7ebf\u7a0b\u7ec4\uff0c\u5b83\u662f system \u7ebf\u7a0b\u7ec4\u7684\u76f4\u63a5\u5b50\u7ebf\u7a0b\u7ec4\uff0c\u8fd9\u4e2a\u7ebf\u7a0b\u7ec4\u81f3\u5c11\u5305\u542b\u4e00\u4e2a main \u7ebf\u7a0b\uff0c\u7528\u4e8e\u6267\u884c main \u65b9\u6cd5\uff1b<\/li>\n\n\n\n
                  • sub \u7ebf\u7a0b\u7ec4\uff0c\u5b83\u662f main \u7ebf\u7a0b\u7ec4\u7684\u5b50\u7ebf\u7a0b\u7ec4\uff0c\u662f\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u7684\u7ebf\u7a0b\u7ec4\uff1b<\/li>\n<\/ul>\n\n\n\n
                    \u6240\u4ee5\uff0cThreadGroup \u7ebf\u7a0b\u7ec4\u662f\u4e00\u4e2a\u6807\u51c6\u7684\u5411\u4e0b\u5f15\u7528\u7684\u6811\u72b6\u7ed3\u6784\uff0c\u8fd9\u6837\u8bbe\u8ba1\u7684\u76ee\u7684\u662f\u9632\u6b62”\u4e0a\u7ea7”\u7ebf\u7a0b\u88ab”\u4e0b\u7ea7”\u7ebf\u7a0b\u5f15\u7528\u800c\u65e0\u6cd5\u6709\u6548\u5730\u88ab GC \u56de\u6536\u3002<\/p>\n\n\n\n
                    ThreadGroup \u5176\u4ed6\u4e00\u4e9b\u91cd\u8981\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
                    \u65b9\u6cd5<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
                    void checkAccess()<\/td>\u5224\u65ad\u7ebf\u7a0b\u80fd\u5426\u8bbf\u95ee\u8be5\u7ebf\u7a0b\u7ec4<\/td><\/tr>
                    int activeCount()<\/td>\u8fd4\u56de\u7ebf\u7a0b\u7ec4\u53ca\u5176\u5b50\u7ec4\u4e2d\u6d3b\u52a8\u7ebf\u7a0b\u6570\u7684\u4f30\u8ba1\u503c<\/td><\/tr>
                    void destroy()<\/td>\u9500\u6bc1\u7ebf\u7a0b\u7ec4\u53ca\u5b50\u7ebf\u7a0b\u7ec4<\/td><\/tr>
                    void interrupt()<\/td>\u4e2d\u65ad\u7ebf\u7a0b\u7ec4\u4e2d\u6240\u6709\u7ebf\u7a0b<\/td><\/tr>
                    void stop()<\/td>\u505c\u6b62\u7ebf\u7a0b\u7ec4\u4e2d\u6240\u6709\u7ebf\u7a0b<\/td><\/tr>
                    void suspend()<\/td>\u6302\u8d77\u7ebf\u7a0b\u7ec4\u4e2d\u7684\u6240\u6709\u7ebf\u7a0b<\/td><\/tr>
                    ThreadLocal.ThreadLocalMap threadLocals<\/td>\u5b58\u653e\u7ebf\u7a0b\u53d8\u91cf\u526f\u672c\uff0c\u548c ThreadLocal \u914d\u5408\u4f7f\u7528<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
                    \u516d\u3001Java\u7ebf\u7a0b\u4f18\u5148\u7ea7<\/strong><\/p>\n\n\n\n
                    \n\n\n\n
                    \u5728 Thread \u7c7b\u4e2d\uff0c\u5173\u4e8e\u7ebf\u7a0b\u4f18\u5148\u7ea7\u7684\u6e90\u7801\u5982\u4e0b\uff0c\u901a\u8fc7\u6e90\u7801\u53ef\u4ee5\u770b\u51fa\uff0c\u7ebf\u7a0b\u7684\u4f18\u5148\u7ea7\u5728 1~10\uff0cJava \u9ed8\u8ba4\u7684\u7ebf\u7a0b\u4f18\u5148\u7ea7\u4e3a 5\uff0c\u53ef\u4ee5\u901a\u8fc7 setPriority()\u8fdb\u884c\u4f18\u5148\u7ea7\u7684\u8bbe\u7f6e\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u9ad8\u4f18\u5148\u7ea7\u7684\u7ebf\u7a0b\u4f1a\u6bd4\u4f4e\u4f18\u5148\u7ea7\u7684\u7ebf\u7a0b\u66f4\u4f18\u5148\u6267\u884c\uff0c\u4f46\u662f\u6700\u7ec8\u6267\u884c\u7684\u987a\u5e8f\u8fd8\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u7684\u8c03\u5ea6\u5668\u6765\u51b3\u5b9a\u3002\u6240\u4ee5\u8bf4\uff0cJava \u4e2d\u7684\u7ebf\u7a0b\u7684\u4f18\u5148\u7ea7\u6765\u662f\u4e00\u4e2a\u53c2\u8003\u503c\uff0c\u5b83\u53ea\u662f\u7ed9\u64cd\u4f5c\u7cfb\u7edf\u4e00\u4e2a\u5efa\u8bae\uff0c\u6700\u7ec8\u7684\u8c03\u7528\u987a\u5e8f\uff0c\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u7684\u7ebf\u7a0b\u8c03\u5ea6\u7b97\u6cd5\u51b3\u5b9a\u7684\u3002<\/p>\n\n\n\n
                    public class Thread implements Runnable { \n    private int priority;\n    \/**\n     * The minimum priority that a thread can have.\n     *\/\n    public static final int MIN_PRIORITY = 1;\n\n    \/**\n     * The default priority that is assigned to a thread.\n     *\/\n    public static final int NORM_PRIORITY = 5;\n\n    \/**\n     * The maximum priority that a thread can have.\n     *\/\n    public static final int MAX_PRIORITY = 10;\n}\n\n\n<\/pre>\n\n\n\n
                    \u4e0a\u6587\u6211\u4eec\u5bf9 Thread \u7684\u5de5\u4f5c\u539f\u7406\uff0c\u7ebf\u7a0b\u7ec4\u7b49\u76f8\u5173\u77e5\u8bc6\u8fdb\u884c\u4e86\u8bb2\u89e3\uff0c\u90a3\u4e48\uff0c\u7ebf\u7a0b\u4f5c\u4e3a Java19 \u4e4b\u524d\u7684\u6700\u5c0f\u8fd0\u884c\u5355\u5143\uff0c\u4ed6\u4eec\u4e4b\u95f4\u662f\u5982\u4f55\u901a\u4fe1\u7684\u5462\uff1f<\/p>\n\n\n\n
                    \u4e03\u3001Java\u7ebf\u7a0b\u901a\u4fe1<\/strong><\/p>\n\n\n\n
                    \n\n\n\n
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                    \u516b\u3001\u603b\u7ed3<\/strong><\/p>\n\n\n\n
                    \n\n\n\n
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