Java计算球的体积

```package practice1;
import java.util.Scanner;
public class Xingxing{
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);//键盘输入球半径
		double r=sc.nextDouble();
		double v=0;
		v=Math.PI*r*r*r*4/3;//体积公式
		System.out.printf("%.2f",v);
	}
}