Java Code Example: volume and surface area of a ball

The following code snippet shows the calculation of volume and surface area of a sphere. The calculations are each performed in separate functions.

import java.util.Scanner;

class VolumeSurfaceBall {
    static double getVolume(double r) {
        // Math.pow(base, exponent): Returns base raised to the power exponent
        return (4 * Math.PI * Math.pow(r, 3)) / 3;
    }

    static double getSurfaceArea(double r) {
        return 4 * Math.PI * Math.pow(r, 2);
    }

    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        double r, area, volume;

        System.out.print("Please enter radius: ");
        r = reader.nextDouble();
        reader.close();

        area = getSurfaceArea(r);
        volume = getVolume(r);

        System.out.println("Volume: " + String.format("%1.2f", volume));
        System.out.println("Surface Area: " + String.format("%1.2f", area));
    }
}

Output

Please enter radius: 2.5
Volume: 65.45
Surface Area: 78.54