تحديات برمجيةالتحدي السابع - حل التمرين الأول بلغة جافا

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int n;

        do {
            System.out.print("Enter an odd number as the number of lines: ");
            n = input.nextInt();
        }
        while (n <= 0 || n%2 == 0);
        
        for (int i = 1; i <= n; i++)
        {
            for (int j = 1; j <= n; j++)
            {
                if ( j == 1 || j == n || i == j || j == n - i + 1 )
                {
                    System.out.print("*");
                }
                else
                {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }

    }

}

Enter an odd number as the number of lines: 11
*         *
**       **
* *     * *
*  *   *  *
*   * *   *
*    *    *
*   * *   *
*  *   *  *
* *     * *
**       **
*         *