printFormation

    public static void main(String[] args) {

		printFormation2(8);

}

private static void printFormation2(int number) {

        number = number * 2 + 1;
        for (int row = 1; row < number; row++) {
            for (int column = 1; column <= number; column++) {

                if ((row == column || column == number - row + 1) && row < number / 2 + 1) {
                    System.out.print(column <= number / 2 ? "\\" : "/");
                } else if (column == number / 2 + 1) {
                    System.out.print("|");
                } else {
                    System.out.print(".");
                }
            }
            System.out.println();
        }
    }