线程轮循打印ABC...

package com.java.concurrent;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * 使用多线程的方式进行轮循打印ABCABC
 * @author fliay
 *
 */
public class TestABCAlternate {

    public static void main(String[] args) {
        final AlternateDemo ad = new AlternateDemo();
        new Thread(new Runnable() {
            
            public void run() {
                for(int i = 1;i<10;i++){
                    try {
                        ad.loopA(i);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }
        },"线程1").start();
        
    new Thread(new Runnable() {
            
            public void run() {
                for(int i = 1;i<10;i++){
                    try {
                        ad.loopB(i);
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
            }
        },"线程2").start();
    
    
    new Thread(new Runnable() {
        
        public void run() {
            for(int i = 1;i<10;i++){
                try {
                    ad.loopC(i);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    },"线程3").start();
    
    
    
    }

    

}


class AlternateDemo{
    
    private int number=1;//当前正在执行的线程标记
    
    private Lock lock = new ReentrantLock();
    
    private Condition condition1 = lock.newCondition();
    private Condition condition2 = lock.newCondition();
    private Condition condition3 = lock.newCondition();
    
    public void loopA(int totalLoop) throws InterruptedException{
        lock.lock();
        try{
            //1.判断
            if(number!=1){
                condition1.await();
            }
            //2.打印
            System.out.println(Thread.currentThread().getName()+":A"+"-"+totalLoop);
            
            //3.唤醒
            number=2;
            condition2.signal();
        }finally{
            lock.unlock();
        }
    }
    
    public void loopB(int totalLoop) throws InterruptedException{
        lock.lock();
        try{
            //1.判断
            if(number!=2){
                condition2.await();
            }
            //2.打印
            System.out.println(Thread.currentThread().getName()+":B"+"-"+totalLoop);
            
            //3.唤醒
            number=3;
            condition3.signal();
        }finally{
            lock.unlock();
        }
    }
    
    
    public void loopC(int totalLoop) throws InterruptedException{
        lock.lock();
        try{
            //1.判断
            if(number!=3){
                condition3.await();
            }
            //2.打印
            System.out.println(Thread.currentThread().getName()+":C"+"-"+totalLoop);
            
            //3.唤醒
            number=1;
            condition1.signal();
        }finally{
            lock.unlock();
        }
    }
    
    
    
    
    
    
    
    
    
    
    
    
}