<JAVA学习笔记7>——生产者、消费者案例（1）

多线程开发中经典的案例。生产者、消费者案例

• 若在Food类中，不添加get，set方法，那么没个菜品不会和它的功能对应上。
• 程序一开始，线程将会开始抢占资源

package com.xiaofeng.example;/** * 生产者、消费者案例 * @author XiaoFeng1015 */public class TheadDemo5 {    public static void main(String[] args) {        Food food = new Food();        Producter p = new Producter(food);        Customers c = new Customers(food);        Thread t1 = new Thread(p);        Thread t2 = new Thread(c);        t1.start();        t2.start();    }}class Producter implements Runnable {    private Food food;    public Producter(Food food) {        this.food = food;    }    @Override    public void run() {        for (int i = 0; i < 50; i++) {            if (i % 2 == 0) {                // food.setName("银耳莲子汤！");                // try {                // Thread.sleep(500);                // } catch (InterruptedException e) {                // e.printStackTrace();                // }                // food.setEfficasy("功效：美容养颜！");                food.set("银耳莲子汤！", "功效：美容养颜！");            } else {                // food.setName("糖醋里脊！");                // try {                // Thread.sleep(500);                // } catch (InterruptedException e) {                // e.printStackTrace();                // }                // food.setEfficasy("功效： 酸甜可口！");                food.set("糖醋里脊！", "功效： 酸甜可口！");            }        }    }}class Customers implements Runnable {    private Food food;    public Customers(Food food) {        this.food = food;    }    @Override    public void run() {        for (int i = 0; i < 50; i++) {            // try {            // Thread.sleep(500);            // } catch (InterruptedException e) {            // // TODO Auto-generated catch block            // e.printStackTrace();            // }            // System.out.println(food.getEfficasy() + "-->" + food.getName());            food.get();        }    }}// 使用同步方法将生产和消费包裹起来。class Food {    private String name;    private String efficasy;    public Food() {        super();    }    public Food(String name, String efficasy) {        super();        this.name = name;        this.efficasy = efficasy;    }    public synchronized void set(String name, String efficasy) {        this.setName(name);        try {            Thread.sleep(500);        } catch (InterruptedException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        this.setEfficasy(efficasy);    }    public synchronized void get() {        // 加休眠的目的：为了防止get在一开始时取空        try {            Thread.sleep(500);        } catch (InterruptedException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        System.out.println(this.getName() + "-->" + this.getEfficasy());    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getEfficasy() {        return efficasy;    }    public void setEfficasy(String efficasy) {        this.efficasy = efficasy;    }}

结果：
两种菜品会在一段时间内只显示一个，因为在访问一个同步方法时，另一个同步方法不允许被访问。