retain two decimal digits.

 package kju.o;

 import static kju.print.Printer.*;

 import java.text.*;

 class MathDemo

 {

     public static void main(String[] args)

     {

         double d = 1.2458;

         println(round(d));    //prints:1.25

     }

     static String round(double d)

     {

         DecimalFormat nf = new DecimalFormat("#.00");

         return nf.format(d);    //retain two decimal digits.

     }

 }