Как остановить Timer (который использует класс временной шкалы) с помощью функции endtest, которая нуждается в событии

Question

У меня есть программа, которая позволит пользователю сдать экзамен.Экзамен будет приурочен.Библиотека временной шкалы будет использоваться внутри класса initializes, чтобы она запускалась, когда пользователь вводит туда данные для входа.Мне интересно, как бы я завершил тест с помощью функции endtest (), созданной моим партнером ниже.Он принимает событие как параметр.Я пытался использовать нуль, но это не сработало.Нужно ли мне просто создать событие и предоставить поддельные данные?Будет ли это работать, даже если данные являются поддельными? Ссылка на файл сама по себе

public class QuestionsController implements Initializable {

    QuestionsDataFactory test = new JSONQuestionDataFactory();
    List<QuestionsData> data = test.getQuestionsData();
    List<String> possibleAnswers;
    int count = 0;
    ToggleGroup group = new ToggleGroup();
    Toggle selectedAnswer[] = new Toggle[data.size()];

    private Integer timeSeconds = 18;

    @FXML
    private Label timerLabel;

    @FXML
    private Label savedAnswer;

    @FXML
    private Button logOut;

    @FXML
    private Button nextBtn;

    @FXML
    private Button prevBtn;

    @FXML
    private Label questionText;

    @FXML
    private RadioButton answerOne;

    @FXML
    private RadioButton answerTwo;

    @FXML
    private RadioButton answerThree;

    @FXML
    private RadioButton answerFour;

    @FXML
    private void loadLogin(ActionEvent event) throws IOException {
        Parent QuestionPane = FXMLLoader.load(getClass().getResource("Login.fxml"));
        Scene tableViewScene = new Scene(QuestionPane);

        Stage window = (Stage) ((Node) event.getSource()).getScene().getWindow();
        window.setScene(tableViewScene);
        window.show();
    }

    @FXML
    private void loadNextQuestion(ActionEvent event) throws IOException {

        if (count < data.size() - 1) {
            if (group.getSelectedToggle() != null) {
                selectedAnswer[count] = group.getSelectedToggle();
                group.getSelectedToggle().setSelected(false);
            }

            if (selectedAnswer[count + 1] != null) {
                group.selectToggle(selectedAnswer[count + 1]);
            }
        }

        if (count == data.size() - 1) {
            questionText.setText(data.get(count).getQuestionText());
            possibleAnswers = data.get(count).getPossibleAnswers();
            answerOne.setText(possibleAnswers.get(0));
            answerTwo.setText(possibleAnswers.get(1));
            answerThree.setText(possibleAnswers.get(2));
            answerFour.setText(possibleAnswers.get(3));
        } else {
            count++;
            questionText.setText(data.get(count).getQuestionText());
            possibleAnswers = data.get(count).getPossibleAnswers();
            answerOne.setText(possibleAnswers.get(0));
            answerTwo.setText(possibleAnswers.get(1));
            answerThree.setText(possibleAnswers.get(2));
            answerFour.setText(possibleAnswers.get(3));
        }
    }

    @FXML
    private void loadPreviousQuestion(ActionEvent event) throws IOException {
        if (count > 0) {
            if (group.getSelectedToggle() != null) {
                selectedAnswer[count] = group.getSelectedToggle();
                group.getSelectedToggle().setSelected(false);
            }

            if (selectedAnswer[count - 1] != null) {
                group.selectToggle(selectedAnswer[count - 1]);
            }
        }

        if (count == 0) {
            questionText.setText(data.get(count).getQuestionText());
            possibleAnswers = data.get(count).getPossibleAnswers();
            answerOne.setText(possibleAnswers.get(0));
            answerTwo.setText(possibleAnswers.get(1));
            answerThree.setText(possibleAnswers.get(2));
            answerFour.setText(possibleAnswers.get(3));
        } else {
            count--;
            questionText.setText(data.get(count).getQuestionText());
            possibleAnswers = data.get(count).getPossibleAnswers();
            answerOne.setText(possibleAnswers.get(0));
            answerTwo.setText(possibleAnswers.get(1));
            answerThree.setText(possibleAnswers.get(2));
            answerFour.setText(possibleAnswers.get(3));
        }
    }

    @FXML
    private void endTest(ActionEvent event) throws IOException {
        ArrayList<User> users = User.deserializeUsers();
        int[] answers = new int[data.size()];
        double correct = 0;
        int userID = FXMLDocumentController.currentUserID;
        NumberFormat formatter = new DecimalFormat("#0.00");
        User currentUser = users.get(userID);

        if (group.getSelectedToggle() != null) {
            selectedAnswer[count] = group.getSelectedToggle();
        }

        for (int i = 0; i < data.size(); i++) {
            if (selectedAnswer[i] != null) {
                if (selectedAnswer[i].getUserData().equals(0)) {
                    answers[i] = 0;
                }

                if (selectedAnswer[i].getUserData().equals(1)) {
                    answers[i] = 1;
                }

                if (selectedAnswer[i].getUserData().equals(2)) {
                    answers[i] = 2;
                }

                if (selectedAnswer[i].getUserData().equals(3)) {
                    answers[i] = 3;
                }
            } else {
                answers[i] = 4;
            }

            if (answers[i] == data.get(i).getCorrectAnswerIdx()) {
                correct++;
            }
        }

        double score = correct / (double) data.size() * 100;
        currentUser.setScores(score);
        currentUser.setAnswers(answers);
        currentUser.setTests(data);
        User.serializeUsers(users);
        System.out.println("Number of Tests taken: " + currentUser.getNumTests());
        for (int i = 0; i < currentUser.getNumTests(); i++) {
            System.out.println("Score for test " + (i + 1) + ": " + formatter.format(currentUser.getScores(i)) + "%");
        }

        Parent QuestionPane = FXMLLoader.load(getClass().getResource("Login.fxml"));
        Scene tableViewScene = new Scene(QuestionPane);

        Stage window = (Stage) ((Node) event.getSource()).getScene().getWindow();
        window.setScene(tableViewScene);
        window.show();

    }

    @FXML
    private void saveAnswer(ActionEvent event) throws IOException {
        if (group.getSelectedToggle() != null) {
            selectedAnswer[count] = group.getSelectedToggle();
            savedAnswer.setVisible(true);

            PauseTransition pause = new PauseTransition();
            pause.setDuration(Duration.seconds(1.4));

            pause.setOnFinished(e -> {

                savedAnswer.setVisible(false);
            });
            pause.play();
        }
    }

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        answerOne.setUserData(0);
        answerTwo.setUserData(1);
        answerThree.setUserData(2);
        answerFour.setUserData(3);

        answerOne.setToggleGroup(group);
        answerTwo.setToggleGroup(group);
        answerThree.setToggleGroup(group);
        answerFour.setToggleGroup(group);

        questionText.setText(data.get(count).getQuestionText());
        possibleAnswers = data.get(count).getPossibleAnswers();
        answerOne.setText(possibleAnswers.get(0));
        answerTwo.setText(possibleAnswers.get(1));
        answerThree.setText(possibleAnswers.get(2));
        answerFour.setText(possibleAnswers.get(3));

        // update timerLabel
        timerLabel.setText(timeSeconds.toString());
        Timeline timer = new Timeline();
        timer.setCycleCount(Timeline.INDEFINITE);
        timer.getKeyFrames().add(
                new KeyFrame(Duration.seconds(1),
                        new EventHandler() {
                    // KeyFrame event handler
                    @Override
                    public void handle(Event event) {
                        timeSeconds--;
                        // update timerLabel
                        timerLabel.setText(timeSeconds.toString());
                        if (timeSeconds <= 0) {
                            timer.stop();

                            try {
                                endTest(null);
                            } catch (IOException ex) {
                                Logger.getLogger(QuestionsController.class.getName()).log(Level.SEVERE, null, ex);
                            }
                        }
                    }
                }));

        timer.playFromStart();
    }

    private void Timer() {

    }
}