Java - Constructor Program

class cons
  {
    int l;
    int b;

    cons() // default constructor
     {
        l=1;
        b=2;
     }

    cons(int tl) // function name is same as class name
     {
         l=tl;
         b=4;
      }

     cons(int tl,int tb) // class name same as function  name with different parameter
      {
         l=tl;
         b=tb;
      }

     void display()
        {
            System.out.println("\n");
            System.out.println("Length of the rectangle = "+l);
            System.out.println("Breadth of the rectangle = "+b);
        }

      public static void main(String arg[])
        {
             cons r1=new cons();
             r1.display();

             cons r2=new cons(6);
             r2.display();

             cons r3=new cons(10,20);
             r3.display();
        }
  }