多线程之包子铺

需求分析：

包子类：皮、馅、是否有货。

包子铺：有个锁对象(包子)、先判断包子是否有货(flag是否等于false)

若有货-》包子铺调用wait()进入休息状态

若无货-》包子铺开始做包子-》做好包子修改包子的flag为true并调用notify()唤醒顾客线程

顾客：有个锁对象(包子)、先判断还有没有包子(flag是否等于true)

若有货-》顾客开始吃包子，吃完包子后将flag设置为false并调用notify()唤醒包子铺开始做包子

若无货-》则调用wait()

具体代码如下：

包子类：

public class BaoZi {
    public String Pi;
    public String Xian;
    public boolean flag;

}

包子铺类：

import java.util.Random;
public class BaoZiPu extends Thread {
    private BaoZi bz;
    public BaoZiPu(BaoZi bz){
        this.bz = bz;
    }
    @Override
    public void run() {
        String pis[]={"玉米皮","小麦皮","大豆皮","无皮"};
        String xians[]={"西葫芦","虾米","韭菜","猪肉大葱"};
        int i=0,j=0;
        while (true){
            synchronized (bz){
                if (bz.flag){
                    try {
                        bz.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                i = (int) (Math.random()*10000)%pis.length;
                j = (int) (Math.random()*10000)%xians.length;
                bz.Pi=pis[i];
                bz.Xian=xians[j];
                System.out.println(i+","+j+"正在做"+bz.Pi+bz.Xian+"馅的包子");
                try {
                    Thread.sleep(3000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                bz.flag=true;
                bz.notify();

            }
        }
    }
}

顾客类：

public class Customer extends Thread {
    private BaoZi bz;
    public Customer(BaoZi bz){
        this.bz = bz;
    }
    @Override
    public void run() {

        while (true){
        synchronized (bz){
            if (!bz.flag){
                try {
                    bz.wait();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            System.out.println("顾客正在吃"+bz.Pi+bz.Xian+"馅的包子");
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            bz.flag=false;
            bz.notify();
            System.out.println("顾客已经吃完"+bz.Pi+bz.Xian+"馅的包子，包子铺正在做包子");
        }
        }
    }
}

最后运行结果图：

 

来源：CSDN

作者：zg97zb

链接：https://blog.csdn.net/zg97zb/article/details/103757157