java - Need explaination on two different approach to find factorial -

i beginner.i learned c. java seeming difficult me. in c programming approach simple , when looked @ book's programs simple task such factorial, given complex programs below -

class factorial {     // recursive method     int fact(int n) {         int result;         if(n==1) return 1;         result = fact(n-1) * n;         return result;     } } class recursion {     public static void main(string args[]) {         factorial f = new factorial();         system.out.println("factorial of 3 " + f.fact(3));         system.out.println("factorial of 4 " + f.fact(4));         system.out.println("factorial of 5 " + f.fact(5));     } } 

instead, when made own program (given below) keeping simple , worked , easy. can tell me what's difference between 2 ?

public class simplefacto {     public static void main(string[] args) {        int n = 7;        int result = 1;        (int = 1; <= n; i++) {            result = result * i;        }        system.out.println("the factorial of 7 " + result);    } } 

also can tell me java ee , java se ?

the first approach of recursion. not fast , easy. (and leads stackoverflowerror, if not careful). second approach of normal loop. interstingly, both approaches valid in "c".

i think should not compare java programs c programs. both languages designed different reasons.