ProgBasicsJavaBook1.0FirstSteps6SquareOfStars

import java.util.Scanner;

public class SquareofStars {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = Integer.parseInt(scan.nextLine());

        String stars = new String(new char[n]).replace("\0", "*");
        System.out.println(stars);

        for (int i = 0; i < n - 2; i++) {
            System.out.printf("*");
            System.out.printf(new String(new char[n - 2]).replace("\0"," "));
            System.out.println("*");

        }

        System.out.println(stars);
    }
}