Квадрат от звездички

package FirstStepsInCoding;


import java.util.Scanner;


    public class Pr06SquareOfStar {
        public static void main(String[] args) {
            String star = "*";
            Scanner s2 = new Scanner(System.in);
            int n = s2.nextInt();
            for (int a = 1; a <= n; a++) {
                if (a == 1 || a == n) {
                    for (int i = 1; i <= n; i++) {
                        System.out.print(star);
                    }
                } else for (int b = 1; b <= n; b++) {
                    if (b == 1 || b == n) {
                        System.out.print(star);
                    } else System.out.print(" ");
                }
                System.out.print("\n");
            }
        }
    }