libjava/testsuite/libjava.lang/Thread_Sleep_2.java

   1 // Test that Thread.sleep() is accurate
   2 // and that nanoTime actually measures in nanoseconds.
   3
   4 public class Thread_Sleep_2
   5 {
   6   public static void main(String args[])
   7   {
   8     try
   9     {
  10       boolean ok = true;
  11       for (int i = 0; i < 100; i++)
  12         {
  13           long start = System.nanoTime();
  14           Thread.sleep(10);
  15           long end = System.nanoTime();
  16           if ((end - start) < 10000000)
  17             {
  18               System.out.print ("failed, iteration ");
  19               System.out.print (i);
  20               System.out.print (", time ");
  21               System.out.print (end - start);
  22               System.out.println ("ns");
  23               ok = false;
  24             }
  25         }
  26       if (ok)
  27         System.out.println ("ok");
  28     }
  29     catch (InterruptedException x)
  30     {
  31       System.out.println("error: Thread interrupted.");
  32     }
  33   }
  34 }