producerandconsumer.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter10;
public class ProducerAndConsumer
{
    public static void main(String args[]) 
    {
        Quantity q=new Quantity();
        new Producer(q);
        new Consumer(q);
        System.out.println("Press Control-C to stop.");
    }
}
class Quantity 
{
    int n;
    synchronized int get() 
    {
        System.out.println("Got: "+n);
        return n;
    }
    synchronized void put(int n) 
    {
        this.n=n;
        System.out.println("Put: "+n);
    }
}
class Producer implements Runnable 
{
    Quantity q;
    Producer(Quantity q) 
    {
        this.q=q;
        new Thread(this,"Producer").start();
    }
    public void run() 
    {
        int i=0;
        while(true) 
        {
            q.put(i++);
        }
    }
}
class Consumer implements Runnable 
{
    Quantity q;
    Consumer(Quantity q) 
    {
        this.q=q;
        new Thread(this,"Consumer").start();
    }
    public void run() 
    {
        while(true) 
        {
            q.get();
        }
    }
}