121.生产者和消费者-代码改写__

最新推荐文章于 2025-12-05 17:02:52 发布

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#java #开发语言 #后端

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本文档展示了在Java中如何使用`Foodie`和`Cooker`线程类共同管理`Desk`资源，通过`synchronized`和`notify/wait`实现并发控制，模拟了生产与消费的场景。

package com.itheima.threaddemo14;

public class Demo {
    public static void main(String[] args) {
        Desk desk =new Desk();
        Foodie f=new Foodie(desk);
        Cooker c=new Cooker(desk);
        f.start();
        c.start();
    }
}

package com.itheima.threaddemo14;

public class Foodie extends Thread{
    private Desk desk;
    public Foodie(Desk desk) {
            this.desk=desk;
    }

    @Override
    public void run() {
        while (true){
            synchronized (desk.getLcok()){
               if(desk.getCount()==0){
                   break;
                } else{
                   //有
                   if (desk.isFlag()){
                       System.out.println("吃货在吃汉堡包");
                       desk.setFlag(false);
                       desk.getLcok().notifyAll();
                       desk.setCount(desk.getCount()-1);
                   }else {
                       try {
                           desk.getLcok().wait();
                       } catch (InterruptedException e) {
                           e.printStackTrace();
                       }
                   }
                }
            }
        }
    }
}

package com.itheima.threaddemo14;

public class Cooker extends Thread{
    private Desk desk;
    public Cooker(Desk desk) {
        this.desk=desk;
    }

    @Override
    public void run() {
       while (true){
           synchronized (desk.getLcok()){
                if (desk.getCount()==0){
                    break;
                }else {
                    if (!desk.isFlag()){
                        //生产
                        System.out.println("厨师生产汉堡包");
                        desk.setFlag(true);
                       desk.getLcok().notifyAll();
                    }else {
                        try {
                            desk.getLcok().wait();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }
           }
       }
    }
}

package com.itheima.threaddemo14;

public class Desk {
    //是否有汉堡包
    //public static boolean flag=false;
    private boolean flag;
    //汉堡包的总数量
    //public static int count=10;
    private  int count=10;
    //锁对象
    //public static final Object lcok= new Object();
    private final Object lcok= new Object();

    public Desk() {
    }

    public Desk(boolean flag, int count) {
        this.flag = flag;
        this.count = count;
    }

    public boolean isFlag() {
        return flag;
    }

    public void setFlag(boolean flag) {
        this.flag = flag;
    }

    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public Object getLcok() {
        return lcok;
    }

    @Override
    public String toString() {
        return "Desk{" +
                "flag=" + flag +
                ", count=" + count +
                ", lcok=" + lcok +
                '}';
    }
}