libjava/testsuite/libjava.lang/Thread_Join.java

   1 // Many threads join a single thread.
   2 // Origin: Bryce McKinlay <bryce@albatross.co.nz>
   3
   4 class Sleeper implements Runnable
   5 {
   6   int num = -1;
   7
   8   public Sleeper(int num)
   9   {
  10     this.num = num;
  11   }
  12
  13   public void run()
  14   {
  15     System.out.println("sleeping");
  16     try
  17     {
  18       Thread.sleep(500);
  19     }
  20     catch (InterruptedException x)
  21     {
  22       System.out.println("sleep() interrupted");
  23     }
  24     System.out.println("done");
  25   }
  26 }
  27
  28 class Joiner implements Runnable
  29 {
  30   Thread join_target;
  31
  32   public Joiner(Thread t)
  33   {
  34     this.join_target = t;
  35   }
  36
  37   public void run()
  38   {
  39     try
  40     {
  41       long start = System.currentTimeMillis();
  42       join_target.join(2000);
  43       if ((System.currentTimeMillis() - start) > 1900)
  44         System.out.println("Error: Join timed out");
  45       else
  46         System.out.println("ok");
  47     }
  48     catch (InterruptedException x)
  49     {
  50       System.out.println("join() interrupted");
  51     }
  52   }
  53
  54 }
  55
  56 public class Thread_Join
  57 {
  58   public static void main(String[] args)
  59   {
  60     Thread primary = new Thread(new Sleeper(1));
  61     primary.start();
  62     for (int i=0; i < 10; i++)
  63     {
  64       Thread t = new Thread(new Joiner(primary));
  65       t.start();
  66     }
  67   }
  68 }