javaSE基础编程——线程同步

编写程序模拟3个老师分发80份试卷，每个老师分发试卷为一个线程

package com.cissst.software.thread;

public class GivePaper implements Runnable {

 private int paper = 80;

 Object lock = new Object();

 @Override

 public void run() {

  // TODO Auto-generated method stub

  while(paper>0){

   try {

    Thread.sleep(1000);

   } catch (InterruptedException e) {

    // TODO Auto-generated catch block

    e.printStackTrace();

   }

   synchronized(lock){

    if(paper>0){

     System.out.println(Thread.currentThread().getName()

       +"正在发第"+paper+"张试卷");

     //发完一张减一张

     paper--;

    }

   }

  }

 }

}

package com.cissst.software.thread;

public class MainThread {

 /**

  * @param args

  */

 public static void main(String[] args) {

  // TODO Auto-generated method stub

  GivePaper givepaper = new GivePaper();

  new Thread(givepaper,"第一个老师").start();

  new Thread(givepaper,"第二个老师").start();

  new Thread(givepaper,"第三个老师").start();

 }

}