07Java多线程-8. 线程API之守护线程

public class ThreadDaemon extends Thread {
  @Override
  public void run() {
    for (int x = 0; x < 100; x++) {
      System.out.println(getName() + ":" + x);
    }
  }
}

/*
 * public final void setDaemon(boolean on):将该线程标记为守护线程或用户线程。
 * 当正在运行的线程都是守护线程时，Java 虚拟机退出。 该方法必须在启动线程前调用。 
 * 
 * 
 */
public class ThreadDaemonDemo {
  public static void main(String[] args) {
    ThreadDaemon td1 = new ThreadDaemon();
    ThreadDaemon td2 = new ThreadDaemon();
 
    td1.setName("关羽");
    td2.setName("张飞");
 
    // 设置守护线程
    td1.setDaemon(true);
    td2.setDaemon(true);
 
    td1.start();
    td2.start();
 
    Thread.currentThread().setName("刘备");
    for (int x = 0; x < 5; x++) {
      System.out.println(Thread.currentThread().getName() + ":" + x);
    }
  }
}