面包工厂

package com.aaa;
/*
 * 
 * 面包作坊，如果数量低于100个，工人就会生产，如果数量高于280，工人将不会生产，并通知用户来进行购买
 * 
 * 如果用户面包数量不够，通知工人来生产面包,如果数量够了就购买面包
 * 
 * 
 * 
 * 如果工人发现数量够了就是wait，不够就生产并通知购买
 * 如果用户发现数量够了就买再wait，如果不够就通知生产
 * 
 * notifyAll() ：：唤醒其它正在等待的线程
 * wait（）：让当前线程等待，只到有人唤醒他
 */
public class BreadFactory {
    
    
    private int count = 200;
    
    
    //面包坊生产的方法
    public synchronized void produce(int i){
        
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        if(count >= 280){
            
            
            try {
                wait();//发现数量足够，去等待,等到其它线程将其叫醒来生产
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName()+"--"+"面包数量足够不用生产，现有面包"+count);
        }else{
            count = count + i;
            notifyAll();//通知其它线程，可以醒过来，购买面包或者生产面包
            
            System.out.println(Thread.currentThread().getName()+"--"+"面包数量不足，生产"+i+"个,现有面包"+count);
        }
        
    }
    
   public synchronized void sell(int i){
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
       
       if(i <= count){
            count = count - i;
            System.out.println(Thread.currentThread().getName()+"--"+"面包数量足够，买走面包"+i+"个,还有"+count+"人");
            try {
                wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
       }else{
           System.out.println(Thread.currentThread().getName()+"--"+"面包数量不足,要"+i+"个，但仅有"+count+"个");
           notifyAll();//数量不够来生产
       }
       
       
   }
}

package com.aaa;

public class Worker extends Thread{
    
    private BreadFactory bf;
    private int count;
    public Worker(BreadFactory bf,int count){
        this.bf = bf;
        this.count = count;
    }
    
    public void run(){
        while(true){
            bf.produce(count);
        }
    }

}

package com.aaa;

public class TestBread {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

        BreadFactory bf = new BreadFactory();
        
        Consumer c0 = new Consumer(bf,100);
        c0.setName("c0");
        Consumer c1 = new Consumer(bf,200);
        c1.setName("c1");
        Consumer c2 = new Consumer(bf,80);
        c2.setName("c2");
        Worker w0 = new Worker(bf,30);
        w0.setName("w0");
        Worker w1 = new Worker(bf,100);
        w1.setName("w1");
        Worker w2 = new Worker(bf,60);
        w2.setName("w2");
        
        c0.start();
        c1.start();
        c2.start();
        w0.start();
        w1.start();
        w2.start();
        
        
    }

}