/**
   A rectangle with a base point, width and height.
   @author Greg Vogl
   last modified 2003-10-14
*/
public class RectangleShape extends Shape
{
   // constructors
   // override defaults
   public RectangleShape() { super(); width = 1; height = 1; }
   public RectangleShape(double x, double y) { super(); width = x; height = y; }

   // additional constructors
   public RectangleShape(double x, double y, double width, double height) 
   { 
      super(x, y); this.width = width; this.height = height; 
   }

   // accessors
   public double width() { return width; }
   public double height() { return height; }

   // calculations
   public double perimeter() { return 2 * (width + height); }
   public double area() { return width * height; }

   // toString
   public String toString()
   {
      return super.toString() + "[width=" + width + ",height=" + height + "]";
   }

   // private variables
   private double width;
   private double height;
}