题目描述
Java编程实现圆柱体表面积和体积的计算，要求从键盘上输入底面圆的半径和圆柱体的高，然后输出结果。
题目分析
首先定义Circle类，然后在main方法中创建Circle类的对象c,利用对象c访问其成员方法setR(),为其成员变量r赋值，访问其成员方法setH(),为其成员变量h赋值。最后通过对象c调用getArea()和getVolume()方法分别计算圆柱体表面积和体积并输出结果。
代码如下
package com.web;
import java.util.Scanner;
class Circle{
public static final double PI=3.14;
private double r;
private double h;
public Circle() {
super();
}
public Circle(double r, double h) {
super();
this.r = r;
this.h = h;
}
public double getR() {
return r;
}
public void setR(double r) {
this.r = r;
}
public double getH() {
return h;
}
public void setH(Double h) {
this.h = h;
}
public static double getPi() {
return PI;
}
public double getArea(){
return PI * r * r * 2 + h * 2 * PI * r;
}
public double getVolume(){
return PI * r * r * h;
}
}
public class CylinderTest {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Circle c = new Circle();
System.out.println("请输入圆的半径:");
c.setR(sc.nextDouble());
System.out.println("请输入圆柱的高:");
c.setH(sc.nextDouble());
System.out.printf("圆柱的面积为:"+ c.getArea());
System.out.printf("圆柱的体积为:"+ c.getVolume());
}
}
