cylinder.java

哈工大实验课源代码

package gg;

public class Cylinder extends Circle implements Comparable,Column{
	private double h;
	private double a;
	public Cylinder(double a, double h) {
		super(a);
		this.h = h;
		this.a = super.getA();
	}
	public double getH() {
		return h;
	}
	public void setH(double h) {
		this.h = h;
	}
	public double getA() {
		return a;
	}
	public void setA(double a) {
		this.a = a;
	}
	
	public double calculateArea(double a,double h){
		double area=0;
		area=2*Math.PI*a*a+2*Math.PI*a*h;
		return area;
	}
	
	public double calculateVolumn(){
		Circle c=new Circle(a);
		double vol;
		vol=(c.calculateArea())*h ;
		return vol;
	}
	public int compareTo(Object a){
		Cylinder c=(Cylinder)a;
		if(this.calculateVolumn()<c.calculateVolumn())
			return -1;
		else
			return 1;
	}
	public void print(){
		System.out.println("圆柱体体积是:"+this.calculateVolumn());
	}
	
}