Creating a menu with arrays - sorting results alphabetically and storing, loading from a file

I'm trying to create a menu system for a hotel program using arrays; below are my hotel booking options:

A: To Add a customer to a room
V: To View all the rooms
E: To Display all the empty rooms
D: To Delete a customer from a room
F: Find a room from a customers name
S: Store program array data into a plain text file
L: Load program data back from the file into the array
O: View rooms alphabetically by name
e: To end 

I've seem to be able to do from A-F but i'm having trouble ordering the rooms alphabetically and sorting and loading the program array data from a file. Completely lost on the S and L front. A friend has helped with S,L and O but i'm not entirely sure why its not working so i have had to comment it out. If you can help fix the already given solution or something new close to the style i have written the rest of my program in that would be great.

    public class Hotel {
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        //allows you to input selection later

        String roomName;
        int roomNum = 0;

        String[] hotel = new String[10];
        //for (int x = 0; x < 10; x++ ) hotel[x] = "" 

        initialise(hotel); //better to initialise in a procedure

        String MenuChoice; //calling menu choice a String
        char MC; //Reffering menu choice (String) as char

        do {
            System.out.println("Hotel Booking Options");
            System.out.println("=====================================");
            System.out.println("A: To Add a customer to a room");
            System.out.println("V: To View all the rooms");
            System.out.println("E: To Display all the empty rooms");
            System.out.println("D: To Delete a customer from a room");
            System.out.println("F: Find a room from a customers name");
            System.out.println("S: Store program array data into a plain text file");
            System.out.println("L: Load program data back from the file into the array");
            System.out.println("O: View rooms alphabetically by name");
            System.out.println("e: To end ");
            System.out.println(" ");
            System.out.println("Please choose the required option and enter below:  ");
            //Print statement
            MenuChoice = input.next();
            MC = MenuChoice.charAt(0); //(MC)MenuChoice = MenuChoice.charAt(0);

            switch (MC) {
                case 'A':
                    addCustomerToRoom(hotel);//calls the addCustomerToRoom statement below
                    break; //case break A
                case 'V':
                    viewAllRooms(hotel); //calls the viewAllRooms statement below
                    break; //case break V
                case 'E':
                    displayEmptyRooms(hotel); //calls the displayEmptyRooms statement below
                    break; //case break E
                case 'D':
                    deleteCustomer(hotel); //calls the deleteCustomer statement below
                    break; //case break D
                case 'F':
                    findCustomer(hotel); //calls the findCustomer statement below
                    break; //case break F
                case 'S':
//                    storeInTextFile(hotel); //calls the deleteCustomer statement below
                    break; //case break S
                case 'L':
//                    loadFromTextFile(hotel); //calls the findCustomer statement below
                    break; //case break L
                case 'O':
//                    orderAlphabetically(hotel);
                    break; //case break O
            } //end menuChoice MC
            System.out.print(" ");
        } while (MC != 'e');
    }

    private static void initialise(String hRef[]) {
        for (int x = 0; x < 10; x++) {
            hRef[x] = "no customers";
        } //end for loop
        System.out.println("initilise ");
    } //end initialise

    private static void viewAllRooms(String hRef[]) {
        for (int x = 0; x < 10; x++) {
            if (hRef[x].equals("e")) {
                System.out.println("Room " + x + " is empty ");
            } //end if statement
            else {
                System.out.println("Room " + x + " is currently occupied by " + hRef[x]);
            } //end else statement
        } //end for loop
    } //end viewAllRooms

    private static void addCustomerToRoom(String hRef[]) {
        Scanner input = new Scanner(System.in);
        int rNumRef; //different variable to roomNum in Main method
        String rNameRef;

        System.out.println("Enter room number (0-9) or 10 to stop:");
        rNumRef = input.nextInt(); //input the room number

        System.out.println("Enter name for room " + rNumRef + " :");
        rNameRef = input.next(); //input the customer name
        hRef[rNumRef] = rNameRef; //both variables are the same

    } //end addCustomerToRoom

    private static void displayEmptyRooms(String hRef[]) {
        for (int x = 0; x < 10; x++) {
            if (hRef[x].equals("no customers")) {
                System.out.println("Room " + x + " is empty ");
            } //end if statement
        } //end for loop
    } //end displayEmptyRooms

    private static void deleteCustomer(String hRef[]) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter Customer Name");
        String rNameRef;
        rNameRef = input.next(); //input the customer name

        for (int x = 0; x < 10; x++) {
            if (hRef[x].equals(rNameRef)) {
                hRef[x] = "no customers";
                System.out.println("Customer " + rNameRef + " has been removed from Room " + x);
            } //end if statement
        } //end for loop
    } //enddeleteCustomer

    private static void findCustomer(String hRef[]) {
        Scanner input = new Scanner(System.in);
        System.out.println("Enter Customer Name");
        String rNameRef;
        rNameRef = input.next(); //input the customer name

        for (int x = 0; x < 10; x++) {
            if (hRef[x].equalsIgnoreCase(rNameRef)) {
                System.out.println("Room " + x + " is currently occupied by " + hRef[x]);
            } //end if statement
        } //end for loop
    } //end findCustomer

//    private static void storeInTextFile(String hRef[]) throws FileNotFoundException {
//        String HotelFile = "sec/txtFile/HotelCoursework.txt";
//        try (PrintStream HotelStream = new PrintStream(HoteFile)) 
//            for (int x = 0; x < 10; x++) {
//                HotelStream.println(/*x + " " +*/hRef[x]);
//            }
//            HotelStream.close();
//        }
//        /*String HotelFile = "H:HotelCoursework.txt";
//         PrintStream HotelStream = new PrintStream (HotelFile);
//         String rNameRef = new String();
//         for (int x = 0; x < 10; x++) (HotelStream.println(/*x + " " + hRef[x]);
//         HotelStream.close();
//         */
//    } //end storeInTextFile 
//    private static void loadFromTextFile(String hRef[]) throws FileNotFoundException {
//        String HotelScan = new Scanner(new BufferedReader(new FileReader("sec/txtFile/HotelCoursework.txt")));
//        for (int jj = 0; j < 10; j++) {
//            hRef[jj] = HotelScan.nextLine();
//        } //end for loop
//    }//end loadFromTextFile
//    
//    private static void orderAlphabetically(String hRef[]) {
//        boolean flag = true;
//        String temp;
//        int j;
//        while (flag) {
//            flag = false;
//            for (j = 0; j < hotel.length - 1; j++) {
//                if (hRef[j].compareToIgnoreCase(hRef[j + 1]) > 0) {
//                    temp = hRef[j];
//                    hRef[j] = hRef[j + 1];
//                    hRef[j + 1] = temp;
//                    flag = true;
//                } //end if statement
//            } //end for loop
//        } //end while loop
//    } //end orderAlphabetically
} //end public class