例子十.txt

Java大学实用教程 耿祥义编著 课件 PPT

class TicketSeller         //负责卖票的类。
{
   int fiveNumber=1,tenNumber=0,twentyNumber=0; 
   public synchronized void  sellTicket(int receiveMoney)
   { 
       if(receiveMoney==5)
       {
          fiveNumber=fiveNumber+1; 
          System.out.printf("%s给我5元钱，这是您的1张入场卷\n",
                             Thread.currentThread().getName()); 
       }
       else if(receiveMoney==10)           
        {  
          while(fiveNumber<1)
            { 
                try { 
                       System.out.printf("%30s靠边等\n",Thread.currentThread().getName());
                       wait();    //如果线程占有CUP期间执行了wait,就进入中断状态。
                       System.out.printf("%30s结束等待\n",Thread.currentThread().getName());
                    }
               catch(InterruptedException e)
                    {
                    }
            }
           fiveNumber=fiveNumber-1;
           tenNumber=tenNumber+1;
           System.out.printf("%s给我10元钱，找您5元，这是您的1张入场卷\n",
                             Thread.currentThread().getName());
        }
       else if(receiveMoney==20)           
        {  
          while(fiveNumber<1||tenNumber<1)
            { 
                try { 
                       System.out.printf("%30s靠边等\n",Thread.currentThread().getName());
                       wait();    //如果线程占有CUP期间执行了wait,就进入中断状态。
                       System.out.printf("%30s结束等待\n",Thread.currentThread().getName());
                    }
               catch(InterruptedException e)
                    {
                    }
            }
           fiveNumber=fiveNumber-1;
           tenNumber=tenNumber-1;
           twentyNumber=twentyNumber+1;
           System.out.printf("%s给20元钱，找您一张5元和一张10元，这是您的1张入场卷",
                             Thread.currentThread().getName());
        }
       notifyAll();
   }
}
class Cinema implements Runnable            //实现Runnable接口的类（电影院）。
{  
   Thread zhang,sun,zhao;                  //电影院中买票的线程。
   TicketSeller seller;                      //电影院的售票员。
  Cinema()
   {
      zhang=new Thread(this);
      sun=new Thread(this);
      zhao=new Thread(this);
      zhang.setName("张小有");
      sun.setName("孙大名");
      zhao.setName("赵中堂");
      seller=new TicketSeller();
   } 
   public void run()
   {
       if(Thread.currentThread()==zhang)
       {
          seller.sellTicket(20);
       }
       else if(Thread.currentThread()==sun)
       {
          seller.sellTicket(10);
       }
       else if(Thread.currentThread()==zhao)
       {
          seller.sellTicket(5);
       }
   }
}
public class Example
{
    public static void main(String args[])
    {
        Cinema a=new Cinema();
        a.zhang.start();
        a.sun.start();
        a.zhao.start();
    }
}