黑马程序员-多线程-11天-2

/*
死锁。
同步中嵌套同步。

*/

class Ticket implements Runnable
{
    private  int tick = 1000;
    Object obj = new Object();
    boolean flag = true;
    public  void run()
    {
        if(flag)
        {
            while(true)
            {
                synchronized(obj)
                {
                    show();
                }
            }
        }
        else
            while(true)
                show();
    }
    public synchronized void show()//this
    {
        synchronized(obj)
        {
            if(tick>0)
            {
                try{Thread.sleep(10);}catch(Exception e){}
                System.out.println(Thread.currentThread().getName()+"....code : "+ tick--);
            }
        }
    }
}


class  DeadLockDemo
{
    public static void main(String[] args) 
    {

        Ticket t = new Ticket();

        Thread t1 = new Thread(t);
        Thread t2 = new Thread(t);
        t1.start();
        try{Thread.sleep(10);}catch(Exception e){}
        t.flag = false;
        t2.start();


    }
}