public class WindowT1
{
    public static void main(String[] args)
    {
        Windows1 w1 = new Windows1();
        Windows1 w2 = new Windows1();
        Windows1 w3 = new Windows1();
        w1.setName("窗口一");
        w2.setName("窗口二");
        w3.setName("窗口三");
        w1.start();
        w2.start();
        w3.start();
    }
}

class Windows1 extends Thread
{
    static int ticket = 100;
    static Object obj = new Object();
    static boolean isFlag = true;
    public void run()
    {
        while(isFlag)
        {
            show();
        }
    }

    public void show()
    {
        synchronized(Windows1.class)
        {
            if (ticket > 0) {
                try
                {
                    Thread.sleep(10);
                }
                catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
                System.out.println(Thread.currentThread().getName() + ":" + ticket);
                ticket--;
            } else {
                isFlag = false;
            }
        }
    }
}