java 实现生产消费

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知识点：多线程之间的通信；

代码：

public class Resources {
    public static int count=0;
    public static boolean flag=false;
}



public class Producer  implements  Runnable {
    public Resources res;
    public Producer(Resources res) {
        this.res=res;
    }

    @Override
    public void run() {
        while(true){
            synchronized (res){
                while(res.flag){
                    try {
                        res.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
               res.count= res.count+1;
                System.out.println(Thread.currentThread().getName()+"我是生产者，生产第"+res.count+"个产品");
                res.flag=true;
                res.notifyAll();

            }
        }
    }
}



public class Consumer implements Runnable{
    public Resources res;
    public Consumer(Resources res) {
        this.res=res;
    }

    @Override
    public void run() {
        while(true){
            synchronized (res){
                while(!res.flag){
                    try {
                        res.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                System.out.println(Thread.currentThread().getName()+"我是消费者，正在消费第:"+res.count+"个");
                res.flag=false;
                res.notifyAll();

            }
        }
    }
}



public class Test {
    public static void main(String args[]){
      Resources res=new Resources();
      new Thread(new Producer(res),"p1").start();
      new Thread(new Producer(res),"p2").start();
       new Thread(new Consumer(res),"c1").start();
        new Thread(new Consumer(res),"c2").start();
    }
}

执行结果：

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