Write a program to find the factorial of a number using recursive method.

import java.util.;
public class factorial {
int factorial(int n)
{
if(n==0)
return 1;
else
return (nfactorial(n-1));
}
public static void main (String[] args) {
factorial ob = new factorial();
int s = ob.factorial(4);
System.out.println(s);
}
}