java学习之：多线程编程（6）生产者消费者模式代码

生产者

package 多线程.生产者消费者模式2;

public class Producer implements Runnable {

    private MilkBox box;

    public Producer(MilkBox box){
        this.box = box;
    }
    @Override
    public void run() {
        for (int i = 0; i < 30; i++) {
            box.put(i);
        }
    }
}

消费者

package 多线程.生产者消费者模式2;

public class Consumer implements Runnable {

    private MilkBox box;

    public Consumer(MilkBox box){
        this.box = box;
    }
    @Override
    public void run() {
        while (true){
            box.get();
        }
    }
}

共享数据区

package 多线程.生产者消费者模式2;

public class MilkBox {

    private int milk;
	// state 表示奶箱状态，空的话为 false，非空为 true
    private boolean state = false;

	// 要对 put 和 get 方法实现线程同步安全
    public synchronized void put(int milk){
        if (state){
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        this.milk = milk;
        System.out.println("送奶工将第"+this.milk+"瓶奶放入奶箱");
        state = true;
        // 唤醒其他等待的线程
        notifyAll();
    }


    public synchronized void get(){
        if (!state){
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("用户拿到第"+ this.milk + "瓶奶");
        state = false;
        notifyAll();
    }
}

主程序代码

package 多线程.生产者消费者模式2;

import 多线程.消费者生产者模式.Milk;

import javax.swing.*;
import java.beans.Customizer;

public class Demo {
    public static void main(String[] args) {
        MilkBox b = new MilkBox();
        Producer p = new Producer(b);
        Consumer c = new Consumer(b);

        Thread t1 = new Thread(p);
        Thread t2 = new Thread(c);

        t1.start();
        t2.start();
    }
}

运行结果