Handling arrays with objects

Question

well i have 2 classes a driver and a object creator....
i create an object with 4 arrays inside
the arrays are user, mail, password, diskspace
i need to make a sorting method inside my class so the arrays are displayed in alphabetical order but i just dont know how i can make it... here i post everything i have done
import java.io.*;
public class FinalDriver{
    public static void main (String[] args) throws IOException{
        BufferedReader stdIn = new BufferedReader (new InputStreamReader (System.in));       
        PrintWriter stdOut = new PrintWriter(System.out, true);       
        char option;
        boolean flag;       
        int count = 0;
        FinalClass accounts = new FinalClass();
        do{
            menu();
            option = stdIn.readLine().toUpperCase().charAt(0);
            flag = designation(option, accounts, count);
        while (!flag);
        stdOut.println("Finished");   
        public static void menu(){
        PrintWriter stdOut = new PrintWriter(System.out, true);
        stdOut.println ("***********************");
        stdOut.println ("*    E-mail Service   *");
        stdOut.println ("*---------------------*");
        stdOut.println ("*                     *");
        stdOut.println ("*  A) Add new user    *");
        stdOut.println ("*  B) Display stats.  *");
        stdOut.println ("*  C) Sort by name    *");
        stdOut.println ("*  *) Exit            *");
        stdOut.println ("*                     *");
        stdOut.println ("*---Choose a letter---*");           
        stdOut.println ("***********************");   
        public static boolean designation (char option, FinalClass accounts, int count) throws IOException{
            PrintWriter stdOut = new PrintWriter(System.out, true);
        switch (option){
            case 'A':{
                newUser(accounts , count);
                return false;
            case 'B':{
                displayStats(count, accounts);
                return false;
            case 'C':{
                sortInfo(count, accounts);
                return false;
            case '*':{
                return true;
            default:{
                stdOut.println("Invalid input");   
                return false;
        public static void newUser(FinalClass accounts, int count) throws IOException{
            BufferedReader stdIn = new BufferedReader (new InputStreamReader (System.in));
            PrintWriter stdOut = new PrintWriter(System.out, true);
            RandomStringUtils randomPassword = new RandomStringUtils();
            String name, password, email;
            double diskSpace;
            char nameChar, passChar;
            stdOut.println("You have selected new user");
            stdOut.println("What will the username be?");
            name = stdIn.readLine();
            nameChar= name.charAt(0);
            while(nameChar != '*'){           
                stdOut.println("Do tou want to create the password?");
                passChar= stdIn.readLine().toUpperCase().charAt(0);
                if(passChar == 'Y')
                    password= stdIn.readLine();
                else
                    password= passwordMethod(randomPassword);   
        stdOut.println("What will the email be?");
        email= stdIn.readLine();
        stdOut.println("how much disk space is used?");
        diskSpace= Double.parseDouble(stdIn.readLine());
        accounts.newUser(name, password, email, diskSpace, count);
        stdOut.println("What will the username be?");
        name = stdIn.readLine();
        nameChar= name.charAt(0);
        count = count + 1;
        public static void displayStats(int count, FinalClass accounts){
            PrintWriter stdOut = new PrintWriter(System.out, true);
        stdOut.println("You have chosen the Display Statistics option");
        public static void sortInfo(int count, FinalClass accounts){
            PrintWriter stdOut = new PrintWriter(System.out, true);
        stdOut.println("You have chosen the Sort Information option");
        accounts.printString(count, accounts);   
        public static String passwordMethod(RandomStringUtils randomPassword){
            String password;
            password = randomPassword.randomAlphanumeric(8);
            System.out.println("yor password is: "+ password);
            return password;
public class FinalClass
   private String [] user = new String[100];
   private String [] mail = new String[100];
   private String [] password = new String[100];
   private double [] diskSpace = new double[100];
   private int count;
   public FinalClass(){
      for(count= 0; count<100; count =count +1){
          user[count]= "-1";
          mail[count]= "-1";
          password[count]= "-1";
          diskSpace[count]= -1;
   public void newUser(String tempName, String tempPassword, String tempEmail, double tempDiskSpace, int counting){
              user[counting]= tempName;
              password[counting]=tempPassword;
              mail[counting]=tempEmail;
              diskSpace[counting]=tempDiskSpace;
   public void printString (int count, FinalClass accounts){
       for(int i = 0; count > i; i = i + 1){
           System.out.print(user[i] + "     ");
           System.out.print(mail[i] + "     ");
           System.out.print(password[i] + "     ");
           System.out.println(diskSpace[i] + "     ");

Answer 1

a friend of mine explained me that -1 is returned if the first value is bigger than the second 0 if they are the same and 1 if the second is bigger( bigger meaning in ascci)
then, i need to do a while loop with a for inside that leads to an if statment.. am i right?
public void printString (int count, FinalClass accounts){
        boolean flag = true;
        String tempString;
        double tempDouble;
        int intFlag;
        while (flag){
             flag = false;
             for(int i = 0; count > i ; i = i + 1){
                  intFlag = user.compareToIgnoreCase(user[i+1]);
               if (-1){
               else{
     }i just dont know what to put in the if statmente