Not getting output | constructor overloading java

public class RectangleDemo
{
   public static void main(String[] args)
   {
      // Create a Rectangle object with default values
      Rectangle rectangle1 = new Rectangle();

      System.out.println("Area of Rectangle is "
                         + rectangle1getArea());
      System.out.println("Perimeter of Rectangle is "
                         + rectangle1getPerimeter());

      // Create a Rectangle object with given set of values
      Rectangle rectangle2 = new Rectangle(3.5, 4.2);

      System.out.println("Area of Rectangle is "
                         + rectangle2getArea());
      System.out.println("Perimeter of Rectangle is "
                         + rectangle2getPerimeter());
   }
}