多线程修改单一变量值

三里小龙

 
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();
}
}
}
}