本帖最后由 张扬123 于 2012-8-7 21:11 编辑
- class ProducerConsumerDemo
- {
- public static void main(String[] args)
- {
- Resource r = new Resource();
-
- Producer pro = new Producer(r);
- Consumer con = new Consumer(r);
-
- Thread t1 = new Thread(pro);
- Thread t2 = new Thread(pro);
- Thread t3 = new Thread(con);
- Thread t4 = new Thread(con);
- t1.start();
- t2.start();
- t3.start();
- t4.start();
- }
- }
- class Resource
- {
- private String name;
- private int count = 1;
- private boolean flag = false;
- public synchronized void set(String name)
- {
- while(flag)
- try
- {
- wait();
- }
- catch (Exception e)
- {
- }
- this.name=name+"--"+count++;
- System.out.println(Thread.currentThread().getName()+"...生产者..."+this.name);
- flag= true;
- this.notifyAll();
- }
- public synchronized void out()
- {
- while(!flag)
- try
- {
- wait();
- }
- catch (Exception e)
- {
- }
- System.out.println(Thread.currentThread().getName()+"...消费者........."+this.name);
- flag=false;
- this.notifyAll();
- }
- }
- class Producer implements Runnable
- {
- private Resource res;
- Producer(Resource res)
- {
- this.res=res;
- }
- public void run()
- {
- while (true)
- {
- res.set("+商品+");
- }
- }
- }
- class Consumer implements Runnable
- {
- private Resource res;
- Consumer(Resource res)
- {
- this.res=res;
- }
- public void run()
- {
- while (true)
- {
- res.out();
- }
- }
- }
复制代码 代码没有错,也能理解。但是我思考着思考着就钻到一个牛角尖出不来了,我在想一个问题,输出结果总是先打印生产者再打印消费者,这是为什么?为什么不会出现先打印消费者再打印生产者的问题?我觉得这是个很简单的问题,但是由于长时间奋斗现在这个时间我的脑子基本糊涂了,想不下去了,受不了了,求大神简单指导!
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