多线程的问题 - 黑马程序员技术交流社区

class ThreadDemo3 implements Runnable
{
private int ticket=5000;
String a=new String();
public void run()
{
while(true)
{
synchronized(a)
{
if(ticket>0)
{
try{Thread.sleep(5);} catch(Exception e){}
System.out.println(Thread.currentThread().getName()+"卖出了第"+(5000-(--ticket))+"张票！");
}
}
}
}
}
class ThreadTest3
{
public static void main(String[] args)
{
ThreadDemo3 r=new ThreadDemo3();
Thread t0=new Thread(r,"售票窗口0");
Thread t1=new Thread(r,"售票窗口1");
Thread t2=new Thread(r,"售票窗口2");
Thread t3=new Thread(r,"售票窗口3");
/*
Thread t4=new Thread(new Runnable()
{
private int cola=50;
public void run()
{
while(true)
{
if(cola>0)
{
System.out.println(Thread.currentThread().getName()+"卖出了第"+(50-(--cola))+"杯可乐");
}
}
}
},"可乐窗口");*/
t0.start();
t1.start();
t2.start();
t3.start();
//t4.start();
}
}

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