Exam Jan-2016 - 10. Rectangle with Stars

/**
 * Project: Exam_101_January_2016 - created by borkins on 2017-05-03.
 */

import java.util.Scanner;

public class _10_RectangleWithStars
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);

        int n = Integer.parseInt(console.nextLine());

        int rows = n + ((n % 2 == 0) ? 1 : 2);
        int cols = n * 2;
        int innerSp = (n * 2) - 2;
        int centerSp = (innerSp / 2) - 1;

        for (int i = 1; i <= rows; i++)
        {
            if (i == 1 || i == rows) {
                System.out.println(newString("%", cols));
                continue;
            }
            System.out.print("%");

            if (i != (rows - (rows / 2))) {
                System.out.print(newString(" ", innerSp));
            }
            else {
                System.out.printf("%s**%s",
                                  newString(" ", centerSp),
                                  newString(" ", centerSp));
            }
            System.out.println("%");
        }
    }

    public static String newString(String str, int count)
    {
        StringBuilder sb = new StringBuilder();

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