java学习——类之YuanZhu

package hello;

import java.util.Scanner;

public class YuanZhu {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        Yuanzhu1 cys = new Yuanzhu1(in.nextInt(), in.nextInt());
        System.out.println("圆柱的半径是： " + cys.getR() + "
圆柱的高是： " + cys.getHigh());
        System.out.println("圆柱的表面积是： " + cys.biaoArea() + "
圆柱的体积是： " + cys.tiji());
    }
}

class Yuanzhu1 {
    double r, high;

    public Yuanzhu1(double r, double high) {
        this.r = r;
        this.high = high;
    }

    public double getR() {
        return r;
    }

    public void setR(double r) {
        this.r = r;
    }

    public double getHigh() {
        return high;
    }

    public void setHigh(double high) {
        this.high = high;
    }

    public double diArea() {
        return r * r * Math.PI;
    }

    public double biaoArea() {
        return 2 * diArea() + r * 2 * high * Math.PI;
    }

    public double tiji() {
        return diArea() * high;
    }
}