libjava/testsuite/libjava.lang/Throw_3.java

   1 // Check that a NPE likely thrown from the first instruction of a
   2 // method (foo) is properly caught.
   3 public class Throw_3
   4 {
   5   public static void main(String[] args)
   6   {
   7     Throw_3 al = new Throw_3();
   8     try
   9       {
  10         al.foo(null);
  11       }
  12     catch (NullPointerException npe)
  13       {
  14         StackTraceElement ste[] = npe.getStackTrace();
  15         StackTraceElement top = ste[0];
  16         if ("foo".equals(top.getMethodName()))
  17           {
  18             System.out.println("ok");
  19             return;
  20           }
  21       }
  22     System.out.println("bad");
  23   }
  24
  25   public int bar(int[] a)
  26   {
  27     System.out.println("Bar");
  28     return 5;
  29   }
  30
  31   /**
  32    * If the second parameter ('this' being the first) is passed in a
  33    * register, then the first machine instruction in foo is likely to
  34    * fault when null is passed.
  35    */
  36   public int foo(int[] a)
  37   {
  38     int l = a.length;
  39     return l + l;
  40   }
  41 }