Java中多线程模拟包子铺造和 吃货吃包子

包子铺:

import java.util.ArrayList;

public class BaoZiPu implements Runnable {
    //定义变量:包子集合
    ArrayList<String> baoZi;

    public BaoZiPu(ArrayList<String> baoZi) {//将包子集合作为构造方法的形参
        this.baoZi = baoZi;
    }
    @Override
    public void run() {
        int number =0;
        while (true) {//模拟不停的造包子
            synchronized (baoZi) {//同步代码块,所对象为包子集合
                if (baoZi.size() > 0) {//有包子
                    try {
                        baoZi.wait();//无限等待
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                baoZi.add("包子" + number);
                System.out.println(Thread.currentThread().getName()+"包子铺造包子"+number);
                try {
                    Thread.sleep(500);//模拟造包子时间
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                baoZi.notifyAll();//唤醒别的同一个所对象的线程
            }
          number++;
            if (number == 20) {
                return;//做20个包子就下班
            }
        }
    }
}

吃货类:

import java.util.ArrayList;

public class ChiHuo implements Runnable {
    //定义变量:包子集合
    ArrayList<String> baoZi;

    public ChiHuo(ArrayList<String> baoZi) {//将包子集合作为构造方法的形参
        this.baoZi = baoZi;
    }
    @Override
    public void run() {
        int number =0;
        while (true) {//模拟不停的吃包子
            synchronized (baoZi) {//同步代码块,所对象为包子集合
                if (baoZi.size() == 0) {//没有包子
                    try {
                        baoZi.wait();//无限等待
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                String str = baoZi.remove(0);
                System.out.println(Thread.currentThread().getName()+"吃货吃包子:  "+str);
                try {
                    Thread.sleep(500);//模拟吃包子时间
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                baoZi.notifyAll();//唤醒别的同一个所对象的线程

            }
            number++;
            if (number == 20) {
                return;//吃20个包子就下班
            }
        }

    }
}

测试类:

import java.util.ArrayList;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Test01 {
    public static void main(String[] args) {
        //在线程中模拟吃包子和包子铺做包子
        //定义包子集合
        ArrayList<String> baOZi = new ArrayList<>();
        BaoZiPu bp = new BaoZiPu(baOZi);//创建包子铺对象
        ChiHuo ch = new ChiHuo(baOZi);//创建吃货对象
        ExecutorService pool = Executors.newFixedThreadPool(4);//创建有4个线程的线程池对象
        pool.submit(bp);//让线程池执行包子铺线程
        pool.submit(ch);//让线程池执行吃货线程
        pool.submit(bp);//让线程池执行包子铺线程
        pool.submit(ch);//让线程池执行吃货线程


    }
}

控制台打印效果: