CircleSubclass

public class Cylinder extends Circle {
   private double height;

   public Cylinder() {
      super.Circle();
       }

   public Cylinder(double height) {
     super.Circle(height);
   }

   public Cylinder(double radius, double height) {
     super.Circle(radius, height);

   }

   public double getHeight() {
      return  height;
   }

   public double getVolume() {
      return  getArea()*height;
   }

   @Override
   public String toString() {
        return "Cylinder: subclass of " + Circle.toString();
          + " height=" + height;
}

}