杭电 2002 ( 计算球体积 ) java

import java.util.Scanner; import java.text.DecimalFormat;public class Main {    public static void main(String[] args) {        Scanner sc=new Scanner(System.in);        while(sc.hasNext()){        double r=sc.nextDouble();        double f=4/3d;        double x= 3.1415927;        double v=f*(r*r*r)*x;        DecimalFormat df2=new DecimalFormat("###.000");        System.out.println(df2.format(v));        }    }    }