ReentrantLock的Condition条件实现精确唤醒某个线程

/**
 * 描述: 介绍Reentrantlock的condition条件可以实现精确唤醒某个线程
 * 题目：多线程之间按顺序调用，实现A->B->C三个线程启动，要求AA打印5次BB打印10次CC打印15次，这样循环10轮
 *
 * @author [email protected]
 * @create 2020/2/22 20:25
 * @since 2.16.3
 */
class ShareResource{
    private int number = 1;
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void prints5(){
        lock.lock();
        try{
            // 1.判断
            while(number != 1){
                c1.await();
            }
            //2 干活
            for(int i=1;i<=5;i++){
                System.out.println(Thread.currentThread().getName()+"\t "+i);
            }
            //3修改标志位，通知下一个线程
            number = 2;
            c2.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    public void prints10(){
        lock.lock();
        try{
            // 1.判断
            while(number != 2){
                c2.await();
            }
            //2 干活
            for(int i=1;i<=10;i++){
                System.out.println(Thread.currentThread().getName()+"\t "+i);
            }
            //3修改标志位，通知下一个线程
            number = 3;
            c3.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    public void prints15(){
        lock.lock();
        try{
            // 1.判断
            while(number != 3){
                c3.await();
            }
            //2 干活
            for(int i=1;i<=15;i++){
                System.out.println(Thread.currentThread().getName()+"\t "+i);
            }
            //3修改标志位，通知下一个线程
            number = 1;
            c1.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
}
public class SyncAndReentrantLockDemo {
    public static void main(String[] args) {
        ShareResource shareResource = new ShareResource();
        new Thread(()->{
            for(int i=1;i<=10;i++){
                shareResource.prints5();
            }
        },"AA").start();
        new Thread(()->{
            for(int i=1;i<=10;i++){
                shareResource.prints10();
            }
        },"BB").start();
        new Thread(()->{
            for(int i=1;i<=10;i++){
                shareResource.prints15();
            }
        },"CC").start();
    }
}