生产者-消费者模式实现-优快云博客

本文通过Java代码示例详细介绍了生产者-消费者模式的实现方法。利用synchronized关键字和wait/notifyAll方法来同步生产者与消费者的操作，确保线程间的正确交互。此模式在多线程环境下有效地管理资源生产和消费的过程。

package thread;

class Product extends Thread {
String name;
double price;
boolean flag = false;
}

class Producer extends Thread {
Product p;

Producer(Product p) {
    this.p = p;
}

@Override
public void run() {
    // TODO Auto-generated method stub
    int i = 0;
    while (true) {
        synchronized (p) {
            if (p.flag == false) {
                if (i % 2 == 0) {
                    p.price = 6.5;
                    p.name = "苹果";
                } else {
                    p.price = 2.0;
                    p.name = "香蕉";
                }
                System.out.println("生产者生产了" + p.name + p.price);
                i++;//最后改状态
                p.flag = true;
                p.notifyAll();
            } else {

                try {
                    p.wait();
                    System.out.println("生产者等待");
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

        }
    }
}

}

class Consumer extends Thread {
Product p;

public Consumer(Product p) {
    this.p = p;
}

public void run() {
    // TODO Auto-generated method stub
    while (true) {
        synchronized (p) {
            if (p.flag == true) {
                System.out.println("消费者消费产品" + p.name + p.price);
                p.flag = false;
                p.notifyAll();// 唤醒消费者去生产
            } else {
                try {
                    p.wait();
                    System.out.println("消费者等待");
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
}

}

public class Demo5 {
public static void main(String[] args) {
Product p = new Product();
Producer producer = new Producer(p);
Consumer consumer = new Consumer(p);
producer.start();
consumer.start();
}
}