Square Frame N x N - Drawing with Loops

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        int number = Math.abs(Integer.parseInt(input.nextLine()));

        for (int row = 0; row < 1 ; row++) {
                System.out.println("+ " + repeatStr("- ", number - 2) + "+");
            for (int col = 1; col <= number - 2 ; col++) {
                System.out.println("| " + repeatStr("- ", number - 2) + "|");
            }
             System.out.println("+ " + repeatStr("- ", number - 2) + "+");
        }
    }

    public static String repeatStr(String str, int count) {
        StringBuilder squareFlame = new StringBuilder();

        for (int i = 0; i < count; i++) {
            squareFlame.append(str);
        }
        return squareFlame.toString();
    }
}