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();}}