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main thread starting…

 执行结果例如以下:

  main thread starting…

  Thrad 2 staring…

  Thrad 2 end…

  Thrad 4 staring…

  Thrad 4 end…

  Thrad 1 staring…

  Thrad 1 end…

  Thrad 3 staring…

  Thrad 3 end…

  Thrad 5 staring…

  Thrad 5 end…

  main thread end…

  CountDownLatch方式代码例如以下:

  package com.test.thread;

  import java.util.concurrent.CountDownLatch;

  public class MyThread2 extends Thread

  {

  private CountDownLatch count;

  public MyThread2(CountDownLatch count, String name)

  {

  this.count = count;

  this.setName(name);

  }

  @Override

  public void run()

  {

  System.out.println(this.getName() + " staring…");

  System.out.println(this.getName() + " end…")。

  this.count.countDown();

  }

  /**

  * @param args

  */

  public static void main(String[] args)

  {

  System.out.println("main thread starting…");

  CountDownLatch count = new CountDownLatch(5);

  for (int i = 1; i <= 5; i++)

  {

  MyThread2 my = new MyThread2(count, "Thread " + i);

  my.start()。

  }

  try

  {

  count.await();

  }

  catch (InterruptedException e)

  {

  e.printStackTrace();

  }

  System.out.println("main thread end…");

  }

  }

  执行结果例如以下:

  main thread starting…

  Thread 2 staring…

  Thread 2 end…

  Thread 4 staring…

  Thread 4 end…

  Thread 1 staring…

  Thread 1 end…

  Thread 3 staring…

  Thread 3 end…

  Thread 5 staring…

  Thread 5 end…

  main thread end…

main thread starting…