// Fig. 10.9: Cylinder.java
// Cylinder class inherits from Circle.

public class CylinderAsShape extends CircleAsShape {
  private double height;  // Cylinder's height

  // no-argument constructor; height defaults to 0.0
  public CylinderAsShape()
  {
    // implicit call to Circle constructor occurs here
  }

  // constructor
  public CylinderAsShape( int x, int y, double radius, double heightValue )
  {
    super( x, y, radius );  // call Circle constructor
    setHeight( heightValue );
  }

  // set Cylinder's height
  public void setHeight( double heightValue )
  {
    height = ( heightValue < 0.0 ? 0.0 : heightValue );
  }

  // get Cylinder's height
  public double getHeight()
  {
    return height;
  }

  // override abstract method getArea to return Cylinder area
  public double getArea()
  {
    return 2 * super.getArea() + getCircumference() * getHeight();
  }

  // override abstract method getVolume to return Cylinder volume
  public double getVolume()
  {
    return super.getArea() * getHeight();
  }

  // override abstract method getName to return "Cylinder"
  public String getName()
  {
    return "Cylinder";
  }
  // override toString to return String representation of Cylinder
  public String toString()
  {
    return super.toString() + "; Height = " + getHeight();
  }

} // end class CylinderAsShape