Java守护线程用法实例分析

本文实例讲述了Java守护线程用法。分享给大家供大家参考，具体如下：

一 点睛

针对守护线程，只要有一个用户线程在执行，这个进程就不会结束。

当线程中只剩下守护线程时，JVM会自动退出，反之，如果还有其他任何用户线程存在，JVM都不会退出。

二 代码

public class ThreadDaemon{  public static void main( String args[] )  {   ThreadTest t = new ThreadTest();   Thread tt = new Thread( t );   tt.setDaemon( true ); // 设置后台运行   tt.start( );   try   { // 睡眠1毫秒，避免可能出现的没有输出的现象     Thread.sleep( 1 );   }   catch( InterruptedException e )   {     e.printStackTrace();   }  }}class ThreadTest implements Runnable{  public void run()  {   for( int i = 0; true; ++i )   {     System.out.println( i + " " + Thread.currentThread().getName()        + " is running." );   }  }}

三 运行

0  Thread-0 is running.
1  Thread-0 is running.
2  Thread-0 is running.
3  Thread-0 is running.
4  Thread-0 is running.
5  Thread-0 is running.
6  Thread-0 is running.
7  Thread-0 is running.
8  Thread-0 is running.
9  Thread-0 is running.
10  Thread-0 is running.
11  Thread-0 is running.
12  Thread-0 is running.
13  Thread-0 is running.
14  Thread-0 is running.
15  Thread-0 is running.
16  Thread-0 is running.
17  Thread-0 is running.
18  Thread-0 is running.
19  Thread-0 is running.
20  Thread-0 is running.
21  Thread-0 is running.
22  Thread-0 is running.
23  Thread-0 is running.
24  Thread-0 is running.
25  Thread-0 is running.
26  Thread-0 is running.
27  Thread-0 is running.
28  Thread-0 is running.

更多java相关内容感兴趣的读者可查看本站专题：《Java进程与线程操作技巧总结》、《Java数据结构与算法教程》、《Java操作DOM节点技巧总结》、《Java文件与目录操作技巧汇总》和《Java缓存操作技巧汇总》

希望本文所述对大家java程序设计有所帮助。