program to find area of rectangle using inheritance in java

1// Program to find area of rectangle using inheritance in java
2class RectangleDimension
3{
4   int length;
5   int breadth;
6}
7class Rectangle extends RectangleDimension
8{
9   int area;
10   void findArea()
11   {
12      area = length * breadth;
13   }
14}
15public class AreaOfRectangleUsingInheritance 
16{
17   public static void main(String[] args) 
18   {
19      Rectangle obj = new Rectangle();
20      obj.length = 50;
21      obj.breadth = 20;
22      obj.findArea();
23      int area = obj.length * obj.breadth;
24      System.out.println("Area of rectangle is: " + area);
25   }
26}