IN JDK1.1 and 1.2, System.currentTimeMillis has a resolution of 50ms. This
is too inaccurate for many purposes. Here is a test program:

>  class timeres {
>  
>     public static void main(String args[]) {
>  
>        long t1;
>        long t2;
>        t1 = System.currentTimeMillis();
>        t2 = t1;
>        while (t2==t1)
>           t2 = System.currentTimeMillis();
>        System.out.println("Time difference is "+(t2-t1));
>     }
>  }