// Fig. 9.14: Cylinder.java
// Definition of class Cylinder
package com.deitel.jhtp4.ch09;

public class Cylinder extends Circle {
   protected double height;  // height of Cylinder

   // no-argument constructor 
   public Cylinder()
   {
      // implicit call to superclass constructor here
      setHeight( 0 );
   }

   // constructor
   public Cylinder( double cylinderHeight, double cylinderRadius,
      int xCoordinate, int yCoordinate )
   {
      // call superclass constructor to set coordinates/radius
      super( cylinderRadius, xCoordinate, yCoordinate );

      // set cylinder height
      setHeight( cylinderHeight );
   }

   // set height of Cylinder
   public void setHeight( double cylinderHeight )  
   { 
      height = ( cylinderHeight >= 0 ? cylinderHeight : 0 ); 
   }

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

   // calculate area of Cylinder (i.e., surface area)
   public double area() 
   {
      return 2 * super.area() + 
             2 * Math.PI * radius * height;
   }

   // calculate volume of Cylinder
   public double volume() 
   {
      return super.area() * height; 
   }

   // convert the Cylinder to a String
   public String toString()
   {
      return super.toString() + "; Height = " + height;
   }

}  // end class Cylinder


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