1 package com.foo;
2 
3 public class RectangularWindow implements IWindow {
4 
5     double	length;
6     double	width;
7 
RectangularWindow(double length, double width)8     public RectangularWindow(double length, double width) {
9         this.length = length;
10         this.width = width;
11     }
12 
getWindowArea()13     public double getWindowArea() {
14         return length * width;
15     }
16 }