I dont know how to remove the '*' in the last step of calculation step

Question

import java.util.Scanner;

public class Factorial2 {
   public static void main( String[] args ) {

      Scanner input = new Scanner(System.in);

      int n = 0;
      int fac = 1;
      int i;

      System.out.print("n? ");
      n = input.nextInt();   

      for (int j = n ;  j  > 0; j--)
         System.out.print( j + "*");

      for (i = 1 ; i <= n ; i++){
         fac = fac*i;
      }
      System.out.print(" = " + fac );
   }
}

OUTPUT:

n? 3
3*2*1* = 6

How do I remove the last * like 3 * 2 * 1 = 6 That's what the output I want. Is there any function or other ways to solve it?