Java多线程--生产者和消费者问题的初尝试

package JavaDay5_18.JavaThread;

import java.util.Queue;

/**
 * @author myvina@qq.com
 * @date 18-5-18  下午4:21
 */

public class Producer implements Runnable{
    private Queue<Integer> product;

    public Producer(Queue<Integer> product) {
        this.product = product;
    }

    @Override
    public void run() {
        for(int i = 0; i <= 4; i++) {
            synchronized (product) {
                while(product.size() >= 2) {
                    System.out.println("商品货存已满");
                    try {
                        product.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                product.add(i);
                System.out.println("Producing " + i);
                product.notifyAll();
            }
        }
    }
}

消费者代码：

package JavaDay5_18.JavaThread;

import java.util.Queue;

/**
 * @author myvina@qq.com
 * @date 18-5-18  下午4:22
 */

public class Consumer implements Runnable {
    private Queue<Integer> product;

    public Consumer(Queue<Integer> product) {
        this.product = product;
    }

    @Override
    public void run() {
        while (true) {
            synchronized (product) {
                if(product.isEmpty()) {
                    System.out.println("商品缺货");
                    try {
                        product.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                int number = product.poll();
                System.out.println("Consuming " + number);
                product.notifyAll();
                if(number == 4) {
                    break;
                }
            }
        }
    }
}

测试代码：

package JavaDay5_18.JavaThread;

import java.util.LinkedList;
import java.util.Queue;

/**
 * @author myvina@qq.com
 * @date 18-5-18  下午4:43
 */

public class Test {
    public static void main(String[] args) {
        Queue<Integer> product = new LinkedList<>();
        Thread producer = new Thread(new Producer(product));
        Thread consumer = new Thread(new Consumer(product));

        producer.start();
        consumer.start();
    }
}

运行结果：