wap to construct rectengle class with "this" pointer

/*wap to construct rectengle class with "this" pointer*/

import java.lang.*;
class rectangle
{
 int l,b;
 rectangle(int a,int c)
    {
     this.l=a;
     
     this.b=c;
    }
 void display()
    {
     System.out.println("length is="+l);
     System.out.println("breadth is="+b);     
    }
}
class demo_thisrec
{
 public static void main(String arg[])
   {
    rectangle r1=new rectangle(3,4);
    r1.display();
   }
}