Condition实现等待、通知

使用Condition实现等待/通知：

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


public class MyService {
    
    private Lock lock = new ReentrantLock();
    private Condition condition = lock.newCondition();
    
    public void await() {
        try {
            lock.lock();//上锁
            System.out.println("await时间为:" + System.currentTimeMillis());
            condition.await();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
    
    public void signal() {
        try {
            lock.lock();
            System.out.println("signal时间为:" + System.currentTimeMillis());
            condition.signal();
　　　　　　　　　System.out.println("我被唤醒了");
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
}

public class ThreadA extends Thread{

    private MyService service;
    
    public ThreadA(MyService service) {
        this.service = service;
    }
    
    @Override
    public void run() {
        service.await();
    }
}

/**
 *    测试类
 */
public class Run {

    /**
     *    Object类中的wait() 相当于Condition类中的await()
     *    Object类中的wait(long timeout) 相当于Condition类中的await(long time,TimeUnit unit)
     *    Object类中的notify() 相当于Condition类中的signal()
     *    Object类中的notifyAll() 相当于Condition类中的signalAll()
     */
    public static void main(String[] args) {
        MyService service = new MyService();
        
        ThreadA a = new ThreadA(service);
        a.start();
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        service.signal();
    }
}

运行结果如下：