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。