javafx fxml ComboBox Error

Question

Im trying to add a String to a javafx comboBox but i keep getting the above error :/

no suitable method found for add(String)
method Collection.add(CAP#         


        

Answer 1

Simply declare the room_id field in your controller class as

@FXML
private ComboBox room_id;

If you're using

@FXML
private ComboBox room_id;

room_id.getItems() returns a ObservableList i.e. a ObservableList with unknown element type and String cannot be assigned to this type.