用java编写一个圆类Circle,该类拥有:一个成员变量...

参考一下这个吧: 创建一个圆类Circle,该类可以接收圆半径,并具有计算圆周长和面积的方法.import java.math.*; import javax.swing.*; class Circle{ int r; Circle(int r){ this.r=r; } public void getS(){ System.out.println("面积是:"+Math.PI*r*r); }

public class Circle { private double radius; public Circle() { radius = 0; } public Circle(double r) { this.radius = r; } public double getArea() { return Math.PI * radius * radius; } public double getPerimeter() { return 2 * Math.PI * radius; } public void disp() {

public class Circle { private static final float PAI = 3.1415926f; private float radius; public Circle(float radius) { this.radius = radius; } public float getArea() { return PAI * radius * radius; } public float getPeremeter() { return 2 * PAI * radius; } public static

#include class Circle { public:Circle():m_radius(5){} Circle(int radius):m_radius(radius){} int getRadius(){return m_radius;} void Setradius(int radius){if(radius int compareCircle(Circle &h) { return m_radius-h.m_radius; } private:int m_radius; }; int main(

class Circle { private double radius; public Circle() { this(1); } public Circle(double r) { radius = r; } public double area() { return Math.PI * radius * radius; } public double circumference() { return 2 * Math.PI * radius; } public double getRadius() { return

class Circle { private double radius; public Circle() { this(1); } public Circle(double r) { radius = r; } public double area() { return Math.PI * radius * radius; } public double

代码如下:import java.util.Scanner; class Circle { private double radius; public Circle(double radius) { this.radius = radius; } public double getRadius() { return radius; } public void setRadius(double radius) { this.radius = radius; } public double getArea(

class Circle{ protected double radius; public Circle(){ radius=0; } public Circle(double radius) { this.radius = radius; } public double getRadius() { return radius; } public void setRadius(double radius) { this.radius = radius; } public double area(){ return 3.

//父类 public class Point { protected double x; protected double y; public Point(){ } public Point(double x,double y){ this.x=x; this.y=y; } public void printInfo(){ System.out.println("横坐标:"+x+"纵坐标:"+y); } } //子类 public class Circle

import java.util.Scanner; class Round{ public double perimeter(double radius){ return radius*2; } public double area(double radius){ return radius*radius*3.14; } public void print(double radius){ System.out.println("圆的周长为-->"+this.perimeter(

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