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
   4 public class Thread_Alive implements Runnable
   5 {
   6   public static void main(String args[]) throws InterruptedException
   7   {
   8     Thread_Alive ta = new Thread_Alive();
   9     Thread t = new Thread(ta);
  10     System.out.println(t.isAlive());
  11     t.start();
  12     System.out.println(t.isAlive());
  13
  14     Thread.sleep(50);
  15
  16     synchronized (ta)
  17     {
  18       ta.notifyAll();
  19     }
  20
  21     t.join();
  22     System.out.println(t.isAlive());
  23
  24     try
  25     {
  26       t.start();
  27       System.out.println("Error: dead thread can be restarted.");
  28     }
  29     catch (IllegalThreadStateException x)
  30     {
  31       System.out.println ("ok");
  32     }
  33
  34     System.out.println(t.getThreadGroup());
  35   }
  36
  37   public synchronized void run()
  38   {
  39     try
  40     {
  41       wait();
  42     }
  43     catch (InterruptedException x) {}
  44   }
  45
  46 }