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：