java面向对象求圆的

yf0003

于 2022-09-25 19:24:55 发布

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文章标签： java servlet 开发语言

本文链接：https://blog.youkuaiyun.com/yf0003/article/details/127041615



public class Method05 {
    public static void main(String[] args) {
        Circle c = new Circle();
        c.radius = 2.5;
        System.out.println(c.getInfo());
    }
}


class Circle{
    double radius;
    public double getArea(){
        return 3.14*radius*radius;
    }
    public double getPerimeter(){
        return 2*3.14*radius;
    }
    public String getInfo(){
      double area = getArea();
      double peri = getPerimeter();
      return "半径："+radius+";面积："+area+";周长："+peri;
    }
}