I need the class diagram and the sequence diagram for the following code:

1.

import java.util.Scanner;

public class Factorials { public static void main(String[] args) {

String keepGoing = "y"; Scanner scan = new Scanner(System.in); while (keepGoing.equals("y") || keepGoing.equals("Y")) { System.out.print("Enter an integer: "); int val = scan.nextInt();

try { System.out.println("Factorial(" + val + ") = " + MathUtils.factorial(val)); }catch(IllegalArgumentException ex) { ex.printStackTrace(); }

System.out.print("Another factorial? (y/n) "); keepGoing = scan.next();

} }

}

2.

public class MathUtils {

public static int factorial(int n) throws IllegalArgumentException { if (n < 0) throw new IllegalArgumentException ("Factorial: n("+n+") must be a non-negative"); //Passed message to Constructor if(n>16) throw new IllegalArgumentException ("Factorial: n("+n+") can not be greater than 16"); int fac = 1; for (int i=n; i>0; i--) fac *= i; return fac; } }