Calculating Factorial Of Int Number

I'm working on some exercises and I'm having some problems with a method. I want to create a method to calculate the Factorial of an int number. I already wrote code that asks the user to input an int number and it calculates the Factorial, and it works fine

i.e.: if I input 5 it outputs

5! = 120

as it should. Here's the code:

import java.util.Scanner;
public class Factorial1 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int number;
int total = 1;
 
[Code] ....

Now I want to make a method to re-use this code in other programs and I wrote this program:

public class TestClass {
public static void main(String[] args) {
System.out.print(factorial(5));
}
  public static int factorial(int x) {
int total = 0;

[Code] ....

But when I run this program it outputs 0 instead of 120. What is wrong with this code as it compiles just fine but doesn't work as intended.