private void showMenu() {
        System.out.println();
        System.out.println(header);
        System.out.println("   --------------------");
        for (int i = 0; i < menuItems.length; i++) {
            System.out.println(String.format("" + (i + 1) + ": " + menuItems[i]));
        }
        System.out.println(String.format("%2d) %s", EXIT_OPTION, "Return"));
    }