线程 - 守护线程或用户线程（setDaemon）

class StopThread implements Runnable
{
    private boolean flag = true;
    public synchronized void run()
    {
        while(flag)
        {
            try
            {
                wait();
            }
            catch(InterruptedException e)
            {
                System.out.println(Thread.currentThread().getName()+"....Exception");
                flag = false;
            }
            System.out.println(Thread.currentThread().getName()+"....run");
        }
    }
    public void changeFlag()
    {
        flag = false;
    }
}

class StopThreadDemo
{
    public static void main(String[] args)
    {
        StopThread st = new StopThread();
        Thread t1 = new Thread(st);
        Thread t2 = new Thread(st);
        t1.start();
        t2.start();
        int num = 0;
        while(true)
        {
            if(num++==10)
            {
                st.changeFlag();
                break;
            }
            System.out.println(Thread.currentThread().getName()+"....main"+num);
        }
    }
}