Java多线程解决生产者和消费者问题（面向对象）

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假设是生产者-->做面包-->>放到面包柜-->>消费者从面包柜买面包

这里我们需要以下几个类

1：首先，是面包类，叫Bread，它有个成员属性叫name，用于区分哪个面包

2：柜，它应该是用来放置面包使用的，叫Container,每个柜应该有自己的容纳空间，定义一个成员属性叫size

3：生产者类，Creator他有个成员方法，实现runnable接口

4：消费者类，Consumer有个成员方法，实现runnable接口

5：主线程类，控制程序运行

废话不多说，上代码：

MainThread.java

import java.util.ArrayList;public class MainThread {public static void main(String[] args){Container container = new Container();container.setIndex(0);container.setSize(20);container.setBreads(new ArrayList<Bread>());Creator creator1 = new Creator();Creator creator2 = new Creator();Consumer consumer = new Consumer();creator1.setContainer(container);creator2.setContainer(container);consumer.setContainer(container);new Thread(creator1).start();new Thread(creator2).start();new Thread(consumer).start();}}

Bread.java

public class Bread {private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}}

Container.java

import java.util.List;public class Container {private int size;private List<Bread> breads;private int index;public int getSize() {return size;}public void setSize(int size) {this.size = size;}public List<Bread> getBreads() {return breads;}public void setBreads(List<Bread> breads) {this.breads = breads;}public int getIndex() {return index;}public void setIndex(int index) {this.index = index;}// 生产面包public synchronized void createBread() {while (index == size) {try {this.wait();} catch (InterruptedException e) {e.printStackTrace();}}this.notifyAll();try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}Bread bread = new Bread();bread.setName("第  " + (index+1) + " 个面包");this.getBreads().add(bread);System.out.println("生产 "+ this.getBreads().get(this.getIndex()).getName());index++;this.setIndex(index);}//消费面包public synchronized void buyBread(){while(index == 0){try {this.wait();} catch (InterruptedException e) {e.printStackTrace();}}this.notifyAll();try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}System.out.println("消费  "+this.getBreads().get(this.getIndex()-1).getName());this.getBreads().remove(index-1);index--;this.setIndex(index);}}

Creator.java

package com.wangkunfeng.threads;public class Creator implements Runnable{private Container container;//得到装面包的容器public void setContainer(Container container){this.container = container;}@Overridepublic void run() {for(int i =0 ;i<10;i++){this.container.createBread();}}}

Consumer.java

package com.wangkunfeng.threads;public class Consumer implements Runnable {private Container container;public void setContainer(Container container) {this.container = container;}@Overridepublic void run() {for (int i = 0; i < 20; i++) {this.container.buyBread();}}}

待解决问题：其实Container类的createBread和buyBread方法面向对象角度应该放在Creator类和Consumer类里面，但是这样子同步问题不好解决。

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