多个线程运行结束之后主线程再执行CountDownLatch

学习了：http://blog.csdn.net/lvyuanj/article/details/50737123  这个要膜拜一下！

http://blog.csdn.net/lynnlovemin/article/details/75604209

膜拜一下：  原文引用：

import java.util.concurrent.CountDownLatch;    /**  * @filename      : MyThread.java  * @description   : 描述(中文)  * @author        : lvyuanjun  * @create        : 2016年2月24日 下午2:04:30   *  * Modification History:修改日志  * Date                 Author       Version               description  * -------------------------------------------------------------------------------  * 2016年2月24日 下午2:04:30      lvyuanjun  */  public class MyThread {            public static void main(String[] args) throws InterruptedException {                    CountDownLatch countDownLatch = new CountDownLatch(3); //子线程计算器                    System.out.println("start...");                    FirstThread f = new FirstThread(countDownLatch);          Thread thread = new Thread(f);          thread.start();                    SecondThread s = new SecondThread(countDownLatch);          Thread thread1 = new Thread(s);          thread1.start();                    ThreeThread t = new ThreeThread(countDownLatch);          Thread thread2 = new Thread(t);          thread2.start();                    countDownLatch.await(); //等待子线程计算器为零时，则所有的子线程都已经运行完成                    System.out.println("end...");      }  }          class FirstThread implements Runnable {            private CountDownLatch countDownLatch;            public FirstThread(CountDownLatch countDownLatch){          this.countDownLatch = countDownLatch;      }            public void run() {          System.out.println("FirstThread start....");          try {              Thread.sleep(1000*5);          } catch (InterruptedException e) {              e.printStackTrace();          }finally{              System.out.println("FirstThread start1....");              countDownLatch.countDown(); //子线程执行完之后，子线程计算器减一，直至到零          }                }  }  class SecondThread implements Runnable{            private CountDownLatch countDownLatch;;            public SecondThread(CountDownLatch countDownLatch){          this.countDownLatch = countDownLatch;      }            @Override      public void run() {          System.out.println("SecondThread start....");          try {              Thread.sleep(1000*9);          } catch (InterruptedException e) {              e.printStackTrace();          }finally{              System.out.println("SecondThread start1....");              countDownLatch.countDown(); //子线程执行完之后，子线程计算器减一，直至到零          }      }  }  class ThreeThread implements Runnable{            private CountDownLatch countDownLatch;;            public ThreeThread(CountDownLatch countDownLatch){          this.countDownLatch = countDownLatch;      }      @Override      public void run() {          System.out.println("ThreeThread start....");          try {              Thread.sleep(1000*3);          } catch (InterruptedException e) {              e.printStackTrace();          }finally{              System.out.println("ThreeThread start1....");              countDownLatch.countDown();  //子线程执行完之后，子线程计算器减一，直至到零         }      }  }