Java示例暂停线程

public class SleepingThread extends Thread {

   private int countDown = 5;

   private static int threadCount = 0;



   public SleepingThread() {

      super("" + ++threadCount);

      start();

   }

   public String toString() {

      return "#" + getName() + ": " + countDown;

   }

   public void run() {

      while (true) {

         System.out.println(this);

         if (--countDown == 0) return;

         try {

            sleep(100);

         } catch (InterruptedException e) {

            throw new RuntimeException(e);

         }

      }

   }

   public static void main(String[] args) throws InterruptedException {

      for (int i = 0; i < 5; i++) new SleepingThread().join();

      System.out.println("The thread has been suspened.");

   }

}