Java Program to find area and perimeter of a rectangle

//Program to find area and perimeter of a rectangle
import java.util.*;
class areaofr
     {
public static void main(String args[])
      {

    int l,b,area;
    System.out.println(" enter  length of a rectangle :");
    Scanner obj=new Scanner(System.in);
    l=obj.nextInt();
    System.out.println(" Enter breadth/width of a rectangle :");
    b=obj.nextInt();
    System.out.println(" Area of a rectangle : "+l*b);
    System.out.println(" Perimeter of rectangle : "+2*(l+b));
      }
     }