java多线程---顺序打印ABC的三种实现---ReentrantLock方式_reentrantlock顺序打印abc

使用jdk1.5并发包中引入的lock方式，这种方式使用比synchronized这种方式更加灵活，也提供了在获取锁时阻塞的办法

代码如下：

package com.zcj.thread;
 
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
 
public class PrintABC {
    private int status =1;
    private ReentrantLock lock = new ReentrantLock();
    private Condition conditionA = lock.newCondition();
    private Condition conditionB = lock.newCondition();
    private Condition conditionC = lock.newCondition();
    
    public void printA(){
    	lock.lock();
    	try{
    		if(status!=1){
    			conditionA.await();
    		}
    		System.out.print("A");
        	status=2;
        	conditionB.signal();
    	}catch(InterruptedException e){
    		e.printStackTrace();
    	}finally{
    		lock.unlock();
    	}
    }
    public void printB(){
    	lock.lock();
    	try{
    		if(status!=2){
    			conditionB.await();
    		}