Define constant in java

class Example3
{
   static final double KMS_PER_MILE = 1.609;    //way of define constant
   static final double YARD_PER_MILE = 1/1760.0;

  public static void main(String args[])
  {
    double kilo;
    int yards = 385;
    int miles =26;
    kilo = (((YARD_PER_MILE*yards)+miles)*KMS_PER_MILE);
   System.out.println("Kilomters ="+kilo+"Km");
  }
}