java多线程之Condition的使用

package com.eshroe.sweetop.concurrency; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.TimeUnit; import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; class Car2 { private Lock lock = new ReentrantLock(); private Condition condition = lock.newCondition(); private boolean waxOn = false; public void waxed() { lock.lock(); try { waxOn = true; condition.signalAll(); } finally { lock.unlock(); } } public void buffed() { lock.lock(); try { waxOn = false; condition.signalAll(); } finally { lock.unlock(); } } public void waitForWaxing() throws InterruptedException { lock.lock(); try { while (waxOn == false) { condition.await(); } } finally { lock.unlock(); } } public void waitForBuffing() throws InterruptedException { lock.lock(); try { while (waxOn == true) { condition.await(); } } finally { lock.unlock(); } } } class WaxOn2 implements Runnable { private Car2 car; public WaxOn2(Car2 car) { this.car = car; } public void run() { try { while (!Thread.interrupted()) { System.out.println("Wax On!"); TimeUnit.MILLISECONDS.sleep(200); car.waxed(); car.waitForBuffing(); } } catch (InterruptedException e) { System.out.println("Exiting via interrupt"); } System.out.println("Ending Wax On task"); } } class WaxOff2 implements Runnable { private Car2 car; public WaxOff2(Car2 car) { this.car = car; } public void run() { try { while (!Thread.interrupted()) { car.waitForWaxing(); System.out.println("Wax Off"); TimeUnit.MILLISECONDS.sleep(200); car.buffed(); } } catch (InterruptedException e) { System.out.println("Exiting via interrupt"); } System.out.println("Ending Wax Off task"); } } public class WaxOMatic2 { public static void main(String[] args) throws InterruptedException { Car2 car = new Car2(); ExecutorService exec = Executors.newCachedThreadPool(); exec.execute(new WaxOn2(car)); exec.execute(new WaxOff2(car)); TimeUnit.SECONDS.sleep(5); exec.shutdownNow(); } }