import java.lang.Math;
import java.util.Scanner;
public class test2{
public static void main(String [] args){
Scanner sc = new Scanner(System.in);
Circle [] p = new Cylinder[5];
Circle temp = new Cylinder(1,3);
for(int i=0;i < 5;i++){
double m,n;
System.out.println("请输入半径");
m = sc.nextDouble();
System.out.println("请输入高");
n = sc.nextDouble();
p[i] = new Cylinder(m,n);
}
//排序************
for(int m=0;m < 5;m++){
for(int i=0;i < 5;i++){
if(p[m].compareVolume(p[i]) < 0){
temp = p[m];
p[m] = p[i];
p[i] = temp;
}
}
}
//***************
//输出***************
for(int i=0;i < 5;i++){
System.out.println("圆柱体底面圆的半径: " + p[i].getRadius());
System.out.println("圆的面积: " + p[i].getArea(p[i].getRadius()));
System.out.println("圆的周长: " + p[i].getPerimeter(p[i].getRadius()));
System.out.println("圆柱体的体积: " + p[i].getPerimeter(p[i].getArea(p[i].getRadius())));
}
//*******************
}
}
//*****************************************
class Circle{
private double Radius;
public Circle(){
Radius = 0;
}
public Circle(double r ){
Radius = r;
}
public void setRadius(double r){
Radius = r;
}
public double getRadius(){
return Radius;
}
public double getArea(double r){
return Math.PI * r * r;
}
public double getPerimeter(double r){
return 2 * Math.PI * r;
}
public void show(){
System.out.println("圆的面积: " + this.getArea(Radius));
System.out.println("圆的周长: " + this.getPerimeter(Radius));
}
}
//**************************************
class Cylinder extends Circle {
private double height;
public Cylinder (double r, double h){
super(r);
this.height = h;
}
public double getVolume() {
return Math.PI * super.getRadius() * super.getRadius() * height;
}
public double compareVolume(Cylinder another){
return (this.getVolume() - another.getVolume());
}
public double getArea(double r){
return 2 * super.getArea(r);
}
public void showVolume( ){
System.out.println("圆柱体的高:" + this.height);
System.out.println("圆柱体的半径:" + super.getRadius());
System.out.println("圆柱体的体积:" + this.getVolume());
System.out.println("圆柱体的底面积:" + this.getArea(this.getRadius()));
}
}

一个java报的错,求大佬解答
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7条回答 默认 最新
- CSDN专家-sinJack 2021-05-15 21:50关注
Cylinder [] p = new Cylinder[5];
Cylinder temp = new Cylinder(1,3);改成子类吧。compareVolume方法是子类独有的方法。
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