1 class PCDemo  2 { 3     public static void main(String[] args)  4     { 5         Resource r = new Resource(); 6         Producer prd = new Producer(r); 7         Consumer csu = new Consumer(r); 8  9         Thread th0 = new Thread(prd);10         Thread th1 = new Thread(prd);        11         Thread th2 = new Thread(prd);12         Thread th3 = new Thread(prd);13 14         Thread th4 = new Thread(csu);15         Thread th5 = new Thread(csu);16         Thread th6 = new Thread(csu);17         Thread th7 = new Thread(csu);18         th0.start();19         th1.start();20         th2.start();21         th3.start();22         th4.start();23         th5.start();24         th6.start();25         th7.start();26     }27 }28 29 30 class Resource31 {32     private String name;33     private int count =1;34     private boolean flag = false;35 36     public synchronized void set(String name)37     {38         if(flag)39             try40             {41                 wait();42             }43             catch (Exception e)44             {45             }46         this.name = name+"---"+count++;47         System.out.println(Thread.currentThread().getName()+"生產"+this.name);48         flag = true;49         this.notify();50     }51     public synchronized void out()52     {53         if(!flag)54             try55             {56                 wait();57             }58             catch (Exception e)59             {60             }61         System.out.println(Thread.currentThread().getName()+"________消費"+this.name);62         flag = false;63         this.notify();64     }65 66 }67 68 class Producer implements Runnable69 {70     private Resource res;71     Producer(Resource res)72     {73         this.res = res;74     }75     public void run()76     {77         while(true)78         {79             res.set("物件");80         }81     }82 }83 84 class Consumer implements Runnable85 {86     private Resource res;87     Consumer(Resource res)88     {89         this.res = res;90     }91     public void run()92     {93         while(true)94         {95             res.out();96         }97     }98 }