生产者和消费者

 

class  Q ... {
    int n;
    boolean valueSet = false;
    
    synchronized int get()...{
        
        if(!valueSet)...{
            try ...{
                wait();
            } catch (InterruptedException e) ...{
                e.printStackTrace();
            }
        }
        
        System.out.println("Got:" + n);
        
        valueSet = false;
        notify();
        
        return n;
    }
    
    synchronized void put(int n)...{
        if(valueSet)...{
            try ...{
                wait();
            } catch (InterruptedException e) ...{
                e.printStackTrace();
            }
        }
        
        this.n=n;
        System.out.println("Put:" + n);
        
        valueSet = true;
        notify();
    }
}

class  Producer  implements  Runnable ... {
    Q q;
    Thread t;
    Producer(Q q)...{
        this.q=q;
        t = new Thread(this,"Producer");
        t.start();
    }
    
    public void run()...{
        int i=0;
        while(true)...{
            q.put(i++);
        }
    }
    
    public void stop()...{
        t.stop();
    }
}

class  Consumer  implements  Runnable ... {
    Q q;
    Thread t;
    Consumer(Q q)...{
        this.q=q;
        t=new Thread(this,"Consumer");
        t.start();
    }
    
    public void run()...{
        int i=0;
        while(true)...{
            q.get();
        }
    }
    
    public void stop()...{
        t.stop();
    }
}

class  PC ... {
    public static void main(String args[])...{
        Q q=new Q();
        
        Consumer c = new Consumer(q);
        Producer p = new Producer(q);

        try ...{
            Thread.sleep(100);
        } catch (InterruptedException e) ...{
            e.printStackTrace();
        }
        
        p.stop();
        c.stop();
        
        try ...{
            p.t.join();
            c.t.join();
        } catch (InterruptedException e1) ...{
            e1.printStackTrace();
        }
        
    }
}