Calculate Area of Rectangle using Parameterised Constructor

import java.io.*;; 
         class Rectangle 
            { 
                int l,b,a; 
                Rectangle(int x, int y) 
                   { 
                      l = x; 
                      b = y; 
                   } 
                     void GetArea() 
                       { 
                         a=l*b; 
                         System.out.println("Area of Rectangle is : "+a); 
                       } 
            }  
                        class RectangleParameterisedConstructor 
                          { 
                              public static void main(String args[]) 
                              throws IOException 
                               { 
                                 BufferedReader  Br = new BufferedReader(new InputStreamReader(System.in)); 
                                   String lb; 
                                   int Length,Breadth; 
                                   System.out.println("Enter Length and Breadth"); 
                                   lb=Br.readLine(); 
                                   Length=Integer.parseInt(lb); 
                                   lb=Br.readLine(); 
                                   Breadth=Integer.parseInt(lb); 
                                   Rectangle Rect = new Rectangle(Length,Breadth); 
                                   Rect.GetArea(); 
                               } 
                         }