Factorial of a number in Java

public class FactorialInJava{
    public static void main(String args[]) {
        //finding factorial of a number in Java using recursion - Example
        System.out.println("factorial of 5 using recursion in Java is: " + factorial(5));

        //finding factorial of a number in Java using Iteration - Example
        System.out.println("factorial of 6 using iteration in Java is: " + fact(6));
    }

    /*
     * Java program example to find factorial of a number using recursion
     * @return factorial of number
     */
    public static int factorial(int number){
        //base case
        if(number == 0){
            return 1;
        }
        return number*factorial(number -1); //is this tail-recursion?
    }

    /*
     * Java program example to calculate factorial using while loop or iteration
     * @return factorial of number
     */
    public static int fact(int number){
        int result = 1;
        while(number != 0){
            result = result*number;
            number--;
        }
        return result;
    }
}