Square.java incomplete inheritance code 9.2

class Rectangle{
   private int length;
   private int width;

   public Rectangle(){
      length = 1;
      width = 1;
   }

   public Rectangle(int l, int w){
      length = l;
      width = w;
   }

   public void draw(){
      for(int i=0; i < length; i++)
      {
         for(int j=0; j < width; j++)
            System.out.print("* ");
         System.out.println();
      }
      System.out.println();
   }

}

// 1. Make the class square inherit from Rectangle
public class Square{
   // 2. Add a Square no-argument constructor

   // 3. Add a Square constructor with 1 argument for a side

   public static void main(String[] args){
      Rectangle r = new Rectangle(3,5);
      r.draw();
      // 4. Uncomment these to test
      // Square s1 = new Square();
      // s1.draw();
      // Square s = new Square(3);
      // s.draw();
   }
}