/*
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();
}
}
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