/*需求:简单的卖票程序
多窗口同时买票;
*/
/*
死锁:
同步中嵌套同步
*/
class Ticket implements Runnable
{
private int tick=500;
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()
{
synchronized(obj)
{
if(tick >0)
{
try{Thread.sleep(10);}catch(Exception e){}
System.out.println(Thread.currentThread().getName()+" code: "+tick--);
}
}
// if(tick >0)
// {
// try{Thread.sleep(10);}catch(Exception e){}
// System.out.println(Thread.currentThread().getName()+" ...show... "+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();
// Thread t3=new Thread (t);//
// Thread t4=new Thread (t);//
// t3.start();
// t4.start();
}
}
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