Java之间线程的通信

Java之间线程的通信

  • 篮子
  • 生产者
  • 消费者
  • 测试类

篮子里面放水果,默认没有水果。生产者生产水果之后进入等待状态,并通知消费者购买水果。消费者从等待状态被唤醒购买水果使篮子变空之后,又陷入等待状态并通知生产者生产水果。

篮子

package cn1;

public class Basket {
    private boolean isEmpty;
    public void setEmpty(boolean empty){
        isEmpty = empty;
    }
    public boolean isEmpty(){
        return isEmpty;
    }
}

生产者

package cn1;

public class Producer extends Thread{
    private Basket basket;
    public Producer(Basket basket){
        super();
        this.basket = basket;
    }
    public void run(){
        while (true){
            //定义一个同步代码块
            synchronized (basket){
                if(!basket.isEmpty()){
                    //线程挂起,等待
                    try {
                        basket.wait();//现在程序处于阻塞状态
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                    System.out.println("生产者生产水果");
                    basket.setEmpty(false);
                    //通过共享对象通知等待的线程
                    basket.notify();

            }
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

消费者

package cn1;

public class Consumer extends Thread {
    private Basket basket;
    public Consumer(Basket basket){
        super();
        this.basket = basket;
    }
    public void run(){
        while (true){
            //定义一个同步代码块
            synchronized (basket){
                if (basket.isEmpty()){
                    try {
                        basket.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                    System.out.println("消费者购买水果");
                    basket.setEmpty(true);
                    //通过共享对象通知等待的线程
                    basket.notify();

            }
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

测试类

package cn1;

public class Test {
    public static void main(String[] args){
        Basket basket = new Basket();
        Producer producer = new Producer(basket);
        Consumer consumer = new Consumer(basket);
        producer.start();
        consumer.start();
    }
}

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