Class Area

src/main/java/com/thealgorithms/maths/Area.java:6–235

Find the area of various geometric shapes

 * Find the area of various geometric shapes
 */
public final class Area {
    private Area() {
    }

    /**
     * String of IllegalArgumentException for radius
     */
    private static final String POSITIVE_RADIUS = "Radius must be greater than 0";

    /**
     * String of IllegalArgumentException for height
     */
    private static final String POSITIVE_HEIGHT = "Height must be greater than 0";

    /**
     * String of IllegalArgumentException for base
     */
    private static final String POSITIVE_BASE = "Base must be greater than 0";

    /**
     * Calculate the surface area of a cube.
     *
     * @param sideLength side length of cube
     * @return surface area of given cube
     */
    public static double surfaceAreaCube(final double sideLength) {
        if (sideLength <= 0) {
            throw new IllegalArgumentException("Side length must be greater than 0");
        }
        return 6 * sideLength * sideLength;
    }

    /**
     * Calculate the surface area of a cuboid.
     *
     * @param length length of the cuboid
     * @param width width of the cuboid
     * @param height height of the cuboid
     * @return surface area of given cuboid
     */
    public static double surfaceAreaCuboid(final double length, double width, double height) {
        if (length <= 0) {
            throw new IllegalArgumentException("Length must be greater than 0");
        }
        if (width <= 0) {
            throw new IllegalArgumentException("Width must be greater than 0");
        }
        if (height <= 0) {
            throw new IllegalArgumentException("Height must be greater than 0");
        }
        return 2 * (length * width + length * height + width * height);
    }

    /**
     * Calculate the surface area of a sphere.
     *
     * @param radius radius of sphere
     * @return surface area of given sphere