Quiz-Game | A simple quiz game built using Python | Learning library

I'm writing a simple quiz-game application using JavaFx. I want set text on label and buttons with data from a list and table.

I created three class: Main, Controller and Quiz.fxml. I have problem with communication classes and method. In 'Main.java' I created object "Controller controller = new Controller()" and I call method "controller.setText" from 'Controller.java' class.

Now, I have a few options:

-if declate list(ArrayList questions) and tab(String[][] answers) in constuctor 'public Controller(){}' app doesnt work, I get error in this line " "

-if declare everything in 'Text()' method(list, tab and setting text on label) application run but values buttons and label are not changed

-if I declare list and tab in 'setData()', and next I want to change the buttons and label value from 'Text()' method, I cant see the list and I have to declare the same list 'questions' in 'Text()'

I can't figure out what is wrong here, I am sure it's something simple, but it is not easy to search for it, so I apologize if this has been answered already elsewhere.

Situation:

I declare a global array on top of my js file:

I am developing an Alexa Skill with Skill Kit SDK, and now I prepare to publish my Skill's repository on Github. During development I included my Skill's app ID in the according index.js file and diligently committed my work with my local git.

Is there a risk involved in publishing my Skill's repository with my actual app ID? I could imagine that a malicious party might use the app ID (together with the ARN of my Skill's Lambda function) to send lots of requests and thus incur costs on AWS, but maybe there are other risks.

It seems to be good practice not to include the app ID in the public repository, since no example Skill of the official Amazon Alexa organization has their respective app ID included.

i hope someone can help me.

I try to build a Quiz-Game for an event wich should work the following way.

I have a Collection with Games, wich have multiple questions. Those again have different types, answers and a countdown.

The admin has to start a game, the game starts the first question and sets the countdown.

After the countdown ran up, the forminput should be disabled and i want to collect the data from all the client connected to the game.

Is there a way to trigger a method on server side after the countdown ran up to pull data from all clients on server side without a submit on client side?

Im trying to program a Highscore-Screen for a Quiz-Game with a ListView which gives me all the players with their scores. Actually I want to highlight my points, because in the ListView are no nicknames, just ID and points from every Player. The Highscore.js Screen has a connection to a websocket which send me a JSON like this :