Cant add item ih the list

Question

Problem i have is with method called wordMenu() which is inside method called show(). Problem is that last line of method wordMenu() should add newly created words to the mDatabase.
If i use method listWords() (SWITCH 3) i see newly added words on the bottom of the list which is intended. But they never appear if i run the game test again (SWITCH 1). Those newly created words by user should
be added to the mDatabase and program should be able to use them to create new random word list for test.
I dont understand why newly created words appear if i just list words by method from switch 3 but they do not appear in new test-switch1, can someone help me understand and fix this problem with my program.
import java.util.Scanner;
* Class which interacts with user using scanner.
* And runs the main method of the program.
public class Menu
    public Scanner mScanner;
    private static  TestGenerator mGenerator = new TestGenerator();
    private WordDatabase mDatabase;
    * Constructor for objects of class Menu
   public Menu()
        mScanner = new Scanner(System.in);
        mDatabase = new WordDatabase();
     * Main method that runs our program.
     * From welcome menu trough test or adding new words.
     * Up to the goodbye screen.
   public void show()
        login();
        while(true)
            welcomeMenu();
            if(!mScanner.hasNextInt())
                System.out.println(mScanner.nextLine() + " är inte giltigt input");
                continue;
            int option = mScanner.nextInt();
             switch(option)
                case 1:
                    //clearScreen();
                    Test test = mGenerator.generateNewTest();
                    test.start();                  
                break;
                case 2:
                    clearScreen();
                    wordMenu();
                    clearScreen();
                break;
                case 3:
                    clearScreen();
                    listWords();
                break;
                case 4:
                     clearScreen();
                     if(goodbyeMenu()){
                          return;
                     else{
                break;
                default:
                    System.out.println("--> Förstår inte <--");
                break;
    * Method that list all words currently in database.
   private void listWords()
        for(int i = 0; i < mDatabase.size(); i++)
            System.out.println(mDatabase.get(i));
        System.out.println();
     * Method that prints out welcome text.
     * Helps with keeping main method easier to understand.
   private void welcomeMenu()
        System.out.println("Hej och välkommen till Igor's glostränare!");
        System.out.println();
        System.out.println("1.Kör glostest");
        System.out.println("2.Registera ord");
        System.out.println("3.Skriv ut alla glösor.");
        System.out.println("4.Avsluta testet.");
        System.out.println();
        System.out.print("Vad vill du göra ? --> ");
    * Method that takes users name.
    * Helps with keeping main method easier to understand.
   private void login()
       System.out.print("Ditt namn: ");
       mScanner.nextLine();  
       System.out.print("\f");
     * Method that allows user to add new words into database.
   private void wordMenu()
           System.out.println();
           System.out.println("Lägga till ord menyn");
           System.out.println();
           System.out.print("Svenska:-->");
           String Svenska = mScanner.next();
           System.out.println();
           System.out.print("Engelska:-->");
           String Engelska = mScanner.next();
           System.out.println();
           System.out.print("-->");
           System.out.println(Svenska + ":" + Engelska);
           System.out.println();
           Word word = new Word(Svenska, Engelska);
           mDatabase.add(word);    
     * Method that creates goodbye screen.
   private boolean goodbyeMenu()
        System.out.println("Är du säker att du ska avsluta program");
        System.out.println();
        System.out.println(" 1 - avsluta");
        System.out.println(" 2 - gå tillbaka");
        System.out.print("-->");
        int input = mScanner.nextInt();
        if(input == 1){
            return true;
        else{
            return false;
     * Method that clears the screen allowing better overwiev.
   private void clearScreen()
      System.out.print('\u000C');
}Another class which holds method start()
import java.util.ArrayList;
import java.util.Iterator;
* Class that runs test and counting results.
public class Test
    private ArrayList<Word> mTestWords;
    private int mScore;
     * Constructor for objects of class Test.
     * @param is ArrayList wordlist from class Word.
    public Test(ArrayList<Word> wordList)
       mTestWords = wordList;
       mScore=0;
     * Method which count and print out test results.
    public void start()
        System.out.println("Nu startar testet");
        Iterator<Word> it = mTestWords.iterator();
        while(it.hasNext())
            if(it.next().answer())
                mScore++;
        System.out.println("Testet avlklarat; " + mScore + "/" + mTestWords.size());
} Third class that generates test
mport java.util.ArrayList;
* This class generates tests using class RandomN and WordDatabase.
public class TestGenerator
    private RandomN mRandom;  
    private WordDatabase mDatabase;
     * Constructor for objects of class TestGenerator.
    public TestGenerator()
        mDatabase = new WordDatabase();
        mRandom = new RandomN(mDatabase.size());
     * Method that add new words to our wordlist.
     * @param new (word).
    public void addWord(Word word)
        mDatabase.add(word);
        mRandom = new RandomN(mDatabase.size());
     * Method which randomly pick values from our database.
     * @return  Test randomly picked values from database list.
    public Test generateNewTest()
        ArrayList<Word> wordlist = new ArrayList<Word>();
        for(int i = 0; i < 10; i++)    
            int max = mDatabase.size();
            Word word = mDatabase.get(mRandom.getRandomValue(max));
            while(wordlist.contains(word))
                word = mDatabase.get(mRandom.getRandomValue(max));
            wordlist.add(word);    
        return new Test(wordlist);
}Edited by: 901605 on 2011-dec-10 12:32
Edited by: 901605 on 2011-dec-10 12:35
Edited by: 901605 on 2011-dec-10 12:37

Answer 1

Because you're using 2 word databases, when you apparently want only one.
The mDatabase in your Menu class is used for adding the words and displaying, but in your TestGenerator class you create another mDatabase to be used for creating the random tests.