使用线程实现多生产者，多消费者demo

package com.woniuxy.test2;

import java.util.Arrays;

/**
 * @author wuwenjun
 * @time 2020/11/12/21:07:41
 */
//
class Product{
    private String[] strs = "☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆".split(" ");

    private int i;

    public void put(){//加锁，防止放入时被抢走。
        synchronized (this) {
            while(i==strs.length){//当为最大时等待
                try {
                    this.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            strs[i++] = "★";
            System.out.println(Thread.currentThread().getName()+"放入:"+this);
            this.notifyAll();//只要放入后就唤醒其它线程
        }
    }

    public void get(){//加锁，防止取出时被被抢走中断。
        synchronized (this) {
            while(i==0){//当没有星星时，就等待
                try {
                    this.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            //星星-1
            strs[--i] = "☆";
            System.out.println(Thread.currentThread().getName()+"取出:"+this);
            this.notifyAll();//只要取出后，就唤醒其它线程
        }
    }

    @Override
    public String toString() {
        return Arrays.toString(strs);
    }
}

class Shop implements Runnable{

    private Product product;

    public Shop(Product product) {
        this.product = product;
    }

    @Override
    public void run() {
        synchronized (this) {
            while (true) {//不断的取
                product.put();
            }
        }
    }
}

class Consumer implements Runnable{

    private Product product;

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

    @Override
    public void run() {

        synchronized (this) {
            while (true) {
                product.get();
            }
        }
    }
}


public class ShopConsumer {
    public static void main(String[] args) {
        Product product = new Product();//共用的第三方对象

        Shop shop = new Shop(product);
        Consumer consumer = new Consumer(product);

        Thread th = new Thread(shop,"商家1");
        Thread th2 = new Thread(consumer,"用户1");
        Thread th3 = new Thread(shop,"商家2");
        Thread th4 = new Thread(consumer,"用户2");

        th.start();
        th2.start();
        th3.start();
        th4.start();

    }
}