cylinder.java~6~

来自「java 的几个比较不错的有代表性的案例的源码」· JAVA~6~ 代码 · 共 40 行

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2004</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class Cylinder extends Circle {
  protected double height;

  public Cylinder(double h,double r,double a,double b) {
    super(r,a,b);
    setHeight(h);
  }

  public void setHeight( double h ){
    height = (h>=0?h:0);
  }

  public double getHeight(){
    return height;
  }

  public double area(){
    return 2 * super.area()+
        2*3.1415926 *radius*height;
  }

  public double volume(){
    return super.area()*height;
  }

  public String toString(){
    return super.toString() +"; Height = "+height;
  }

}