static methods

static.java

package com.alex.static;

class Algorithm {

    public static double pi = 3.14159;

    public static int Factorial(int x) {
        if (x == 1) {
            return 1;
        } else {
            return x * Factorial(x - 1);
        }
    }

    public static int Fibonachi(int x) {
        if (x == 0 || x == 1) {
            return 1;
        } else {
            return Fibonachi(x - 1) + Fibonachi(x - 2);
        }
    }
}

public class Program {

    public static void main(String[] args) throws Exception {
        System.out.println(Algorithm.Factorial(5));
        System.out.println(Algorithm.Fibonachi(5));

        System.out.println(Math.sqrt(5));
        System.out.println(Math.pow(5, 5));
    }
}