Java Example to Calculate Area of Rectangle Using Classes, Values Not Given

import java.io.*; 
 class rect 
 { 
             int l,b; 
             void setval(int x,int y) 
             { 
                         l=x; 
                         b=y; 
             } 
             int area() 
             { 
                         return (l*b); 
             } 
 }; 
 class RectangleUsingClasses 
 { 
             public static void main (String args[]) throws IOException 
             { 
                         BufferedReader g=new BufferedReader(new InputStreamReader (System.in)); 
                         String h; 
                         int p,q; 
                         rect k=new rect(); 
                         System.out.println("Enter Length and Breadth : "); 
                         h=g.readLine(); 
                         p=Integer.parseInt(h); 
                         h=g.readLine(); 
                         q=Integer.parseInt(h); 
                         k.setval(p,q); 
                         System.out.println("Area of Rectangle is :"+k.area()); 
             } 
 };