狗蛋同学对final变量运用来算圆面积

class Circle{
 double r;
 double pi=3.14;
 public Circle(double r) {
  this.r = r;
 }
 public void Getarea() {
  System.out.println("狗蛋同学算出来的圆的面积为:"+r*r*pi);
 }
 public void Circle(double r) {
  
  
 }
}
public class Dome {
          public static void main(String []args) {
          Circle c  = new Circle (5.0);
          test(c);
            }
          public static void test(Circle c) {
           c = new Circle(4.0);
           c.Getarea();
          }
}