public class Square {
  /*
  public static int square(int a) {
    System.out.println("Square of int: " + a);
    return a * a;
  }
  */
  public static double square(double a) {
    System.out.println("Square of double: " + a);
    return a * a;
  }
  public static void main(String args[]) {
    square(1);
    square('a');
  }
}