线程 --生产和消费问题

package com.lan;
/**
 * 生产和消费的问题
* @ClassName: ProducerConsumer 
* @Description: TODO
* @author LanHantong
* @date 2011-8-9 下午03:13:39 
*
 */
public class ProducerConsumer {
/**
* @param args
*/
public static void main(String[] args) {

SyncStack ss = new SyncStack();

Producer p = new Producer(ss);

Consumer c = new Consumer(ss);

new Thread(p).start();

new Thread(c).start();

       }

}
//窝头类
class WoTou{

int id;

WoTou(int id){

     this.id = id;

              }

public String toString(){

return "wotou :" + id;

 }

}
//箩筐类
class SyncStack{

int index = 0;

WoTou[] arrWT = new WoTou[6];

//生产方法

public synchronized void push(WoTou wt){

while(index == arrWT.length ){

try {

//等待

this.wait();

} catch (InterruptedException e) {

e.printStackTrace();

}

      }
     //唤醒其他线程
     this.notify();
    arrWT[index] = wt;
    index++;
}

//消费方法
public synchronized WoTou pop(){

while(index == 0){

  try {

      this.wait();

 } catch (InterruptedException e) {

       e.printStackTrace();

}

     }
     this.notify();
     index--; 
     return arrWT[index];
  }
}




//生产线程
class Producer implements Runnable{

SyncStack ss = null;

//构造方法   持有SyncStack的引用

Producer(SyncStack ss){

this.ss = ss;

}

@Override

public void run() {

// TODO Auto-generated method stub

for(int i=0; i<20; i++){

WoTou wt = new WoTou(i);

ss.push(wt);

System.out.println("生产了,"+wt);

try {

Thread.sleep((int)(Math.random()*200));

} catch (InterruptedException e) {

e.printStackTrace();

   }

}

       }
}
//消费线程
class Consumer implements Runnable{

SyncStack ss = null;

//构造方法   持有SyncStack的引用

Consumer(SyncStack ss){

     this.ss = ss;

}

@Override

public void run() {

// TODO Auto-generated method stub

for(int i=0; i<20; i++){

WoTou wt = ss.pop();

System.out.println("消费了,"+wt);

try {

Thread.sleep((int)(Math.random() * 1000));

} catch (InterruptedException e) {

e.printStackTrace();

}

    }

}

}