libjava/testsuite/libjava.lang/Thread_Alive.java

   1 // Test the status of the isAlive() flag before, during, and after thread
   2 // execution. Check that thread's threadgroup is null after thread exits.
   3 // Origin: Bryce McKinlay <bryce@albatross.co.nz>
   4
   5 public class Thread_Alive implements Runnable
   6 {
   7   public static void main(String args[]) throws InterruptedException
   8   {
   9     Thread_Alive ta = new Thread_Alive();
  10     Thread t = new Thread(ta);
  11     System.out.println(t.isAlive());
  12     t.start();
  13     System.out.println(t.isAlive());
  14
  15     Thread.sleep(100);
  16
  17     synchronized (ta)
  18     {
  19       ta.notifyAll();
  20     }
  21
  22     t.join();
  23     System.out.println(t.isAlive());
  24
  25     try
  26     {
  27       t.start();
  28       System.out.println("Error: dead thread can be restarted.");
  29     }
  30     catch (IllegalThreadStateException x)
  31     {
  32       System.out.println ("ok");
  33     }
  34
  35     System.out.println(t.getThreadGroup());
  36   }
  37
  38   public synchronized void run()
  39   {
  40     try
  41     {
  42       wait();
  43     }
  44     catch (InterruptedException x) {}
  45   }
  46
  47 }