kels code

package classIsInSession;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;


public class Facebook{


	ArrayList<FacebookUser> fbArray= new ArrayList<FacebookUser>();
	transient Scanner myScan=new Scanner(System.in);
	transient FacebookUser currentUser= new FacebookUser(null, null);
	Facebook fbObject;
	ArrayList<FacebookUser> hugeFriends=new ArrayList<FacebookUser>(); //for getRecommendations()
	int r=0; //for getRecommendations()
	ArrayList<FacebookUser> groupFriends = new ArrayList<FacebookUser>(); //also for getR...
	FacebookUser split = new FacebookUser(null, null); //must i keep going? (getR...)

	public Facebook() {
//		FacebookUser whatUser=new FacebookUser("auspicious","theOne");
//		hugeFriends.add(whatUser);
	}


	public void quit() {
		serialize(); //stores data

		System.exit(0);
	}

	public void serialize(){ //writes fbArray to a file

		try{
			 ObjectOutputStream ObjectOut= new ObjectOutputStream(new FileOutputStream("notFacebookUsers.dat", true));
	         ObjectOut.writeObject(fbObject);
	         ObjectOut.close();

	       }catch(IOException ioe){
	    	   System.out.println("PC: I caught an IOException @serialize method!");
	            ioe.printStackTrace();
	        }
	}


	public void deSerialize(){ //puts info from file into fbObject

		try {
			ObjectInputStream ObjectIn= new ObjectInputStream(new FileInputStream("notFacebookUsers.dat"));
			this.fbObject = (Facebook) ObjectIn.readObject();
			ObjectIn.close();
			} catch (ClassNotFoundException e1) {
				System.out.print("PC: Class not found.");
			} catch (FileNotFoundException e) {
				System.out.print("PC: File not found.");
			} catch(IOException ioe){
		    	System.out.println("PC: I caught an IOException @deSerialize()!");
		    }
	}
//ignore some code until driver
	public void listUsers() {

		 System.out.println("\tList Of Users");
		 System.out.println(fbArray.toString());
	}

	public void addUser() {
		String username;
		String password="";
		String passwordHint="";

		 System.out.println("Now adding a new user: ");
		 System.out.println("Enter the new username: ");
		 username=myScan.nextLine();
		 String y = fbArray.toString();

		 if (y.contains(username)) {
			 System.out.println("User already exists.");
		 }
		 else {
		 System.out.println("Enter the new password: ");
		 password=myScan.nextLine();
		 System.out.println("Enter the new password hint: ");
		 passwordHint=myScan.nextLine();

		 FacebookUser user=new FacebookUser(username, password);
		 user.setPasswordHint(passwordHint);

		 System.out.println("...\nCreated new user: "+user.getUsername()+", Password: "+user.getPassword()+", Hint: "+user.getPasswordHint());
		 System.out.println("Please save this information for your future.\n");
		 fbArray.add(user);
		 }

	}

	public void deleteUser() {

		System.out.println("Enter the username of the account you want to delete: ");
		String username=myScan.nextLine();

		for(int i=0;i<=fbArray.size();i++) {
			String y = fbArray.get(i).getUsername();

		if(!y.equals(username)) { }//do nothing until after for loop

		if(y.equals(username)) {
			System.out.println("Enter your password: ");
			String password=myScan.nextLine();
			Boolean k=fbArray.get(i).checkPassword(password);
			if(k) {
				fbArray.remove(i);
				System.out.println("User successfully removed.");
				Driver.menu();
			}
		}
		}
		System.out.println("That username doesn't exist.");
	}

	public void getPasswordHint() {

		System.out.println("Enter your username for password help: ");
		String username=myScan.nextLine();

		for(int i=0;i<=fbArray.size();i++) { //checks each user name
			String y = fbArray.get(i).getUsername();

		if (y.equals(username)) { //if the username exists
			fbArray.get(i).getPasswordHelp();
			Driver.menu();
		} if (!y.equals(username)) { } //do nothing until after for loop

		}
		System.out.println("That username doesn't exist.");
	}

==============================================================================
									DRIVER

	public class Driver {
	static Scanner myScan=new Scanner(System.in);
	static Facebook theOne=new Facebook();

	public static void main(String[] args) {

		theOne.deSerialize();

		menu();

		}

	public static void menu() {

		System.out.println("\nMenu");
		System.out.println("\t1. List Users");
		System.out.println("\t2. Add a user");
		System.out.println("\t3. Delete a user");
		System.out.println("\t4. Get password hint");
		System.out.println("\t5. Friend Someone");
		System.out.println("\t6. De-Friend Somone");
		System.out.println("\t7. List Friends");
		System.out.println("\t8. Recommend New Friends");
		System.out.println("\t9. Quit");

			try {
				int choice=0;
				System.out.println("\nWhat would you like to do?(1-9)");
				choice=myScan.nextInt();
				myScan.nextLine();

				switch (choice){
				case 0: System.out.println("Invalid choice, please try again.\n");
				System.exit(0);
					break;
				case 1:
					theOne.listUsers();
					break;
				case 2:
					theOne.addUser();
					break;
				case 3:
					theOne.deleteUser();
					break;
				case 4:
					theOne.getPasswordHint();
					break;
				case 5:
					theOne.addFriend();
					break;
				case 6:
					theOne.removeFriend();
					break;
				case 7:
					theOne.listFriends();
					break;
				case 8:
					theOne.recommendFriends();
					break;
				case 9:
				System.out.println("Goodbye.");
				myScan.close();
					theOne.quit();	//saves users to file and closes
				default: System.out.println("Invalid choice, please try again.\n");
					break;
			}
			}
			catch(InputMismatchException ex){
				System.out.println("Invalid choice, please enter an integer.\n");
			}

		Driver.menu();
	}
}
}