解析 public class Circle { double radius; public Circle(double rad) { radius = rad; } public double calcArea() { return Math.PI * radius * radius; } public static void main(String[] args) { Circle c = new Circle(3); System.out.println(c.calcArea()); } }...
在main方法中调用printAreas()方法,调用完毕后输出当前半径值。packagestudy03;publicclassCircle {privatedoubleradius;publicvoidsetRadius(doubleradius) {this.radius =radius; }publicdoublegetRadius() {returnradius; }publicdoublefindArea(){return3.14*radius*radius; } }packagestudy03;publicclassPassObject {publ...
编写一个完整的Java Application 程序。包含接口ShapeArea,类Circle、Rectangle、Test,具体要求如下:⑴接口ShapeArea:
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public class Circle implements Circlearea { public double r;public Circle(double r) { this.r = r;} //圆面积 public double area(double r) { return Circlearea.PI * r * r;} } 圆柱体类Cylinder.java：package test;public class Cylinder implements Circlearea { public double r;pub...
import java.util.*;public class Circle { private double r;Scanner sc=new Scanner(System.in);public Circle(){ super();System.out.println("输入圆的半径：");r=sc.nextDouble();setR(r);double s=getArea();System.out.println("圆的面积S="+s);} public void setR(double r){ ...
In this program, we will java Program see how to calculate the area of a circle when the radius is given.
"CalculateTheAreaAndPerimeterOfACircle" 是一个函数,用于计算圆的面积和周长。这个函数接收两个参数:半径(r)和圆周率(pi)。 首先,我们使用公式计算圆的面积(A): A = pi r 2 然后,我们使用公式计算圆的周长(C): C = 2 pi r 最后,我们将这两个结果返回给调用者。例如: def calculate_area_and_perimeter...
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