/*
 * File: Square.java
 * Author: Java, Java, Java
 * Description: This class represents a geometric square, in
 *  terms of the length of its side. It provides methods to
 *  calculate a square's perimeter and area. This class is
 *  runnable because it contains a main() method. To run it
 *  just type:  java Square
 */

public class Square
{
    private double side;
   
    public Square(double s)
    {
        side = s;
    }
   
    public double calcPerimeter()
    {
        return 4 * side;
    }
    public double calcArea()
    {
        return side * side;
    }

    public static void main(String argv[]) 
    {
        Square square1;              // Declare reference variables
        Square square2;
        square1 = new Square( 25 );  // Create instances
        square2 = new Square( 15 ); 
                                     // Statements to test the access methods
        System.out.print("The area of square1 is ");
        System.out.println(square1.calcArea());
        System.out.print("The perimeter of square1 is ");
        System.out.println(square1.calcPerimeter());
        System.out.print("The area of square2 is ");
        System.out.println(square2.calcArea());
        System.out.print("The perimeter of square2 is ");
        System.out.println(square2.calcPerimeter());
    } // main()
} // Square