cylinder.java

来自「《Java十大经典案例》源代码」· Java 代码 · 共 35 行

/**
 * Cylinder.java
 */

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;
  }

}