public class Test {

  // This works.
  // main is overloaded
  // Don't do it!! Just confuse people!!
  public static double main(double x, double y)
  {
    return (x+y)/2;
  }

  // execution starts here
  public static void main(String[] d) {

    double v = main(3,4);
    System.out.println(v); // 3.5

  }

}