Exam 26-Mar-2016 - 05. Butterfly

/**
 * Project: Exam_26_March_2016 - created by borkins on 2017-05-14.
 */

import java.util.Scanner;

public class _05_Butterfly
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);

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

        int rows = 2 * (n - 2) + 1;

        String stars = new String(new char[n - 2]).replace("\0", "*");
        String dashes = new String(new char[n - 2]).replace("\0", "-");
        String wingsOfStars = stars + "\\ " + "/" + stars;
        String wingsOfDashes = dashes + "\\ " + "/" + dashes;

        for (int row = 0; row < rows; row++)
        {
            if (row == rows / 2)
            {
                for (int col = 0; col < n - 1; col++) {
                    System.out.print(" ");
                }
                System.out.println("@");
                continue;
            }

            if (row % 2 == 0)
            {
                if (row < rows / 2) {
                    System.out.println(wingsOfStars);
                }
                else {
                    System.out.println(new StringBuilder(wingsOfStars).reverse());
                }
            }
            else
            {
                if (row < rows / 2) {
                    System.out.println(wingsOfDashes);
                }
                else {
                    System.out.println(new StringBuilder(wingsOfDashes).reverse());
                }
            }
        }
    }
}