接上一篇，实现Condition三个条件，有这样一个应用：
1、 有三个进程，第一个进程运行1次，第二个进程运行2次，第三个进程运行3次；
2、 先运行第二个进程，然后第一个，然后第三个；
3、 依次运行5次循环。
分析：
此时若用Object的wait和notify是实现不了的，我们能够用Lock锁的Condition实现，我们须要定义三个信号条件，分别控制这三个进程。
实现例如以下：
package andy.thread.test;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock;/** * @author Zhang,Tianyou * @version 2014年11月9日 下午12:12:44 */public class ThreeThreadCondition { static A tasks = new A(); public static void main(String[] args) { // 2号线程 new Thread(new Runnable() { @Override public void run() { for (int i = 1; i <= 5; i++) { // 循环运行5次 tasks.sub2(i); } } }).start(); // 3号线程 new Thread(new Runnable() { @Override public void run() { for (int i = 1; i <= 5; i++) { // 循环运行5次 tasks.sub3(i); } } }).start(); // 主线程取代1号线程 for (int i = 1; i <= 5; i++) { // 循环运行5次 tasks.sub1(i); } } static class A { Lock lock = new ReentrantLock(); Condition condition1 = lock.newCondition(); Condition condition2 = lock.newCondition(); Condition condition3 = lock.newCondition(); // 先运行2号线程 private int execuNum = 2; public void sub2(int i) { lock.lock(); try { // 若不是2 则堵塞等待 while (execuNum != 2) { try { condition2.await(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } for (int j = 1; j <= 2; j++) { System.out.println("sub2 thread sequence of " + j + ", task is " + i); } // 运行完 交给1线程 execuNum = 1; condition1.signal(); } finally { lock.unlock(); } } public void sub1(int i) { lock.lock(); try { // 若不是1则堵塞等待 while (execuNum != 1) { try { condition1.await(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } System.out.println("sub1 thread sequence of " + 1 + ", task is " + i); // 运行完 交给3线程 execuNum = 3; condition3.signal(); } finally { lock.unlock(); } } public void sub3(int i) { lock.lock(); try { // 若不是2 则堵塞等待 while (execuNum != 3) { try { condition3.await(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } for (int j = 1; j <= 3; j++) { System.out.println("sub3 thread sequence of " + j + ", task is " + i); } // 运行完 交给1线程 execuNum = 2; condition2.signal(); } finally { lock.unlock(); } } }} 执行结果例如以下： sub2 thread sequence of 1, task is 1sub2 thread sequence of 2, task is 1sub1 thread sequence of 1, task is 1sub3 thread sequence of 1, task is 1sub3 thread sequence of 2, task is 1sub3 thread sequence of 3, task is 1sub2 thread sequence of 1, task is 2sub2 thread sequence of 2, task is 2sub1 thread sequence of 1, task is 2sub3 thread sequence of 1, task is 2sub3 thread sequence of 2, task is 2sub3 thread sequence of 3, task is 2sub2 thread sequence of 1, task is 3sub2 thread sequence of 2, task is 3sub1 thread sequence of 1, task is 3sub3 thread sequence of 1, task is 3sub3 thread sequence of 2, task is 3sub3 thread sequence of 3, task is 3sub2 thread sequence of 1, task is 4sub2 thread sequence of 2, task is 4sub1 thread sequence of 1, task is 4sub3 thread sequence of 1, task is 4sub3 thread sequence of 2, task is 4sub3 thread sequence of 3, task is 4sub2 thread sequence of 1, task is 5sub2 thread sequence of 2, task is 5sub1 thread sequence of 1, task is 5sub3 thread sequence of 1, task is 5sub3 thread sequence of 2, task is 5sub3 thread sequence of 3, task is 5