java基础问题07---定义一个圆Circle类

利用面向对象的编程方法，设计类Circle计算圆的面积和圆的周长

import java.util.Scanner;
public class CircleText {
	public static void main(String[] args) {
		Scanner value = new Scanner(System.in);
		System.out.println("请输入圆的半径 ");
		Circle c1 = new Circle();
	    double radius1 = value.nextDouble();
		c1.getArea(radius1);
		c1.getPerimeter(radius1);
	}
}


class Circle{
	public void  getArea(double radius) {
		double area = Math.PI*radius*radius;
		System.out.println("圆的面积是："+area);
	}
	
	public void getPerimeter(double radius) {
		double perimeter = Math.PI*radius*2;
		System.out.println("圆的周长是："+perimeter);
	}
}