Java实验报告四

一、实验目的
(1)掌握类的继承方法；
(2)变量的继承和覆盖，方法的继承、重载和覆盖实现；

二、实验内容

1）实验代码

import java.util.Scanner;
public class Circle{
    private static  double radius;
    private double perimeter;
    private double area;
    public Circle(){
        this.setRadius(0);
    }
    public Circle(double r) {
        this.setRadius(r);
    }
    public void setRadius(double radius) {
        this.radius=radius;
    }
    public static double getRadius() {
        return radius;
    }
    public void setPerimeter(double perimeter) {
        this.perimeter=perimeter;
    }
    public double getPerimeter(){
        return getRadius()*2*Math.PI;
    }
    public void setArea(double area) {
        this.area=area;
    }
    public double getArea() {
        return getRadius()*getRadius()*Math.PI;
    }
    public void disp() {
        System.out.println("圆的半径为："+getRadius());
        System.out.println("圆的周长为："+getPerimeter());
        System.out.println("圆的面积为："+getArea());
    }
     static class Cylinder extends Circle{
        private double height;
        public Cylinder(double r,double h) {
            this.setRadius(r);
            this.setHeight(h);
        }
        private void setHeight(double height) {
            this.height=height; 
        }
    public  double getHeight() {
        return height;
    }
    public  double getVol() {
        return getRadius()*getRadius()*Math.PI*getHeight();
    }
    public  void dispVol() {
        System.out.println("圆柱体的体积："+getVol());
    }
    public  static void main(String[] args) {
        Scanner s=new Scanner(System.in);
            System.out.println("请输入半径：");
            double r=s.nextInt();
            System.out.println("请输入高：");
            double h=s.nextInt();
            Cylinder s1=new Cylinder(r,h);
            s1.disp();
            s1.dispVol();       
    }
}
}

2)实验结果截图

Java实验报告四

原文：https://www.cnblogs.com/tzmad/p/11608922.html