Asynchroniczna baza danych w JavieFx

Męczę sie od paru godzin z problemem asynchronicznosci bazy danych w JavieFX. W Swingu miałam SwingWorkera i dawalo to rade bez problemu. W JavieFx czytałam o Taskach ale nie umiem sobie poradzić z problemem aby wyniki z sql były zwracane do zwykłego LinkedListu abym miała swobodny dostep do zawartości.

public class DBConnector {  
  private static Connection conn;  
  private static String url = "jdbc:mysql://localhost:3306/FlightControllerDB";  
  private static String user = "root";
  private static String pass = "Milena123?";  
  public static Connection connect() throws SQLException{  
    try{  
      Class.forName("com.mysql.jdbc.Driver").newInstance();  
    }catch(ClassNotFoundException cnfe){  
      System.err.println("Error: "+cnfe.getMessage());  
    }catch(InstantiationException ie){  
      System.err.println("Error: "+ie.getMessage());  
    }catch(IllegalAccessException iae){  
      System.err.println("Error: "+iae.getMessage());  
    }  
    conn = DriverManager.getConnection(url,user,pass);  
    return conn;  
  }  
  public static Connection getConnection() throws SQLException, ClassNotFoundException{  
    if(conn !=null && !conn.isClosed())  
      return conn;  
    connect();  
    return conn;  
  }  




public class FlightControllerTask extends Task<LinkedList<Flight>>{
private final static int MAX=10000;
ArrayList<Airport> airportList=new ArrayList<>()
@Override
protected LinkedList<Flight> call() throws Exception {
    for (int i = 0; i < MAX; i++) {  
        updateProgress(i, MAX);  
        Thread.sleep(5);  
   }  

    LinkedList<Flight> flightList = new LinkedList<>();
    Connection c ;
    c = DBConnector.connect(); 
    String SQL = "SELECT flight.idflight, airport.nameAirport, airport.nameAirport, flight.departureTime FROM flight INNER JOIN airport";
    ResultSet rs = c.createStatement().executeQuery(SQL);  
    while(rs.next()){  
        flightList.add(new Flight(rs.getInt("idflight"), rs.getString("flightFrom"), rs.getString("flightTo"), rs.getTime("departureTime")));       
   }  

    return flightList;
}



public class FlightControllerService extends Service<LinkedList<Flight>>{
@Override  
protected Task<LinkedList<Flight>> createTask() {  
     return new FlightControllerTask();  
} 

MainController.java

final FlightControllerService service= new FlightControllerService();
    ReadOnlyObjectProperty<LinkedList<Flight>> flightList =service.valueProperty();
    flightList.get();

Zawsze flightlist zwraca mi null.

Umie ktoś pomóc z tym zagadnieniem?