Reading a File "changes" my path and FXMLLoader fails - javafx-8

Question

I've been struggling with my code:
private void longStart() {
Task task = new Task<Void>() {
#Override
protected Void call() throws Exception {
System.out.println("Iniciando");
IOManager io = new IOManager();
System.out.println("Buscando archivo Jugadores");
boolean b = io.BuscarData("Jugadores");
System.out.println("Armando Grupos");
if (!b) {
ServiceManager.CargarGrupos(b);
} else {
if (!io.BuscarData("Grupos")) {
ServiceManager.CargarGrupos(b);
}else{
Grupo.setaGrupos(io.LeerGrupos());
}
}
System.out.println("Cargando Partidos");
ServiceManager.CargarPartidos();
System.out.println("Calculando puntos de Grupos");
ServiceManager.ActualizarPuntos();
//ServiceManager.CargarGoleador();
ready.setValue(Boolean.TRUE);
notifyPreloader(new StateChangeNotification(StateChangeNotification.Type.BEFORE_START));
return null;
}
};
new Thread(task).start();
}
To put it simply, what it does is to ask if a file exists and if it doesn't, then it connects with a web service, does some meaningless object creations and finally creates the File. After all that hustle I can start my UI like this:
try {
root = FXMLLoader.load(getClass().getResource("/fxml/Main.fxml"));
} catch (IOException ex) {
Logger.getLogger(Brasuca.class.getName()).log(Level.SEVERE, null, ex);
}
stage.setTitle("Brasil 2014");
stage.setScene(new Scene(root, 1140, 705));
stage.getIcons().add(new Image("/img/trophy.png"));
stage.setResizable(false);
stage.show();
Which works perfectly when the File its looking for doesn't exist. But when it does Exists it tries to read it:
public ArrayList<Grupo> LeerGrupos() throws FileNotFoundException, IOException, ClassNotFoundException {
ArrayList<Grupo> ag;
try (ObjectInputStream obj = new ObjectInputStream(new FileInputStream("data/Grupos.jug"))) {
ag = (ArrayList<Grupo>) obj.readObject();
}
return ag;
}
Which also works fine, but when the FXMLLoader tries to load, it fails and throws this exception:
GRAVE: null
javafx.fxml.LoadException:
file:/C:/Users/Francisco/Documents/NetBeansProjects/Brasuca/dist/run613176200/Brasuca.jar!/fxml/Main.fxm
Also, if I excecute the loader like this:
root = FXMLLoader.load(getClass().getResource("fxml/Main.fxml"));
The exception changes into:
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException: Location is required.
Any help would be apretiated

Answer 1

root = FXMLLoader.load(getClass().getResource("/fxml/Main.fxml"));
Don't forget the "/" when you try to load fxml class because of it is another package.