package com.weeya.nine;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock;/*** @author skyarac* 三个线程 老大唤醒老二，老二唤醒老三，老三唤醒老大* 2013年12月16日*/public class ThreeConditionCommunication {public static void main(String[] args) {final Business business = new Business();new Thread(new Runnable() { //老大线程@Overridepublic void run() {for (int i = 1; i <= 50; i++) {business.main(i);}}}).start();new Thread(new Runnable() { //老二线程@Overridepublic void run() {for (int i = 1; i <= 50; i++) {business.sub2(i);}}}).start();new Thread(new Runnable() {  //老三线程@Overridepublic void run() {for (int i = 1; i <= 50; i++) {business.sub3(i);}}}).start();}}class Business {Lock lock = new ReentrantLock();Condition condition1 = lock.newCondition();Condition condition2 = lock.newCondition();Condition condition3 = lock.newCondition();private int shouldSub = 1;/** @param i 老大*/public void main(int i) {lock.lock();while (shouldSub != 1) { // 这里可以使用if循环try {condition1.await();// 主线程等待} catch (InterruptedException e) {e.printStackTrace();}}for (int j = 1; j <= 10; j++) {System.out.println("老大 sequence of " + j + ",loop of " + i);}shouldSub = 2;condition2.signal();lock.unlock();}/** @param i 老二*/public void sub2(int i) {lock.lock();while (shouldSub != 2) { // 这里可以使用if循环try {condition2.await(); // 子线程等待} catch (InterruptedException e) {e.printStackTrace();}}for (int j = 1; j <= 10; j++) {System.out.println("老二 sequence of " + j + ",loop of " + i);}shouldSub = 3;condition3.signal();lock.unlock();}/** @param i 老三*/public void sub3(int i) {lock.lock();while (shouldSub != 3) { // 这里可以使用if循环try {condition3.await();} catch (InterruptedException e) {e.printStackTrace();}}for (int j = 1; j <= 10; j++) {System.out.println("老三 sequence of " + j + ",loop of " + i);}shouldSub = 1;condition1.signal();lock.unlock();}}