多线程修改单一变量值

 

package org.fanzone.thread;

 

/** 

 * Title: base<br> 

 * Description: Thread Handler<br> 

 * Copyright: Copyright (c) 2011 <br> 

 * Create DateTime: Jun 14, 2011 3:06:51 PM <br> 

 * @author wangmeng

 */

public class ThreadHandle {

 

/**global variable*/

private int count;

public static void main(String[] args){

ThreadHandle th = new ThreadHandle();

/**the initials of the two inner classes*/

ThreadOne to = th.new ThreadOne();

ThreadTwo tt = th.new ThreadTwo();

Thread t = new Thread(to);

t.start();

t.setName("p");

t = new Thread(tt);

t.start();

t.setName("m");

}

/**

* synchronized method to superimposite 

*/

private synchronized void plus(){

count++;

System.out.println(Thread.currentThread().getName()+" -- "+count);

}

/**

* synchronized method to descend

*/

private synchronized void minus(){

count--;

System.out.println(Thread.currentThread().getName()+" -- "+count);

}

/**

* Title: base<br> 

* Description: A inner class which deal with the plus handler<br> 

* Copyright: Copyright (c) 2011 <br> 

* Create DateTime: Jun 14, 2011 3:09:40 PM <br> 

* @author wangmeng

*/ 

class ThreadOne implements Runnable{

public void run(){

for(int i=0;i<100;i++){

plus();

}

}

}

/**

* Title: base<br> 

* Description: A inner class which deal with the minus handler<br> 

* Copyright: Copyright (c) 2011 <br> 

* Create DateTime: Jun 14, 2011 3:09:40 PM <br> 

* @author wangmeng

*/ 

class ThreadTwo implements Runnable{

public void run(){

for(int i=0;i<100;i++){

minus();

}

}

}

}