From the OpenJFX mailing list:

>In my FXML Controllers I have the following member variable:
>
> private ResourceBundle resources;
>
>After loading my Controller via FXML, I would then set this manually so my
>Controllers could access the resources needed.
>
>In version JFX 2.1 and lower this works fine but in version 2.2 it looks
>like JFX has decided it has control over this variable now? As a result JFX
>attempts to inject the resources, but it fails because the variable is
>private and not marked with @FXML.

In 2.2, support for automatic injection of the controller's "resources" and "location" fields was added. This is only done if the controller does not implement Initializable - the thinking being that, if the controller does implement Initializable, it will get the location and resources via the initialize() method. Otherwise, it is assumed that the controller wants to get these values via injection.

However, this logic does not handle the case where a controller does not implement Initializable, but also does not want these fields injected. The fix is simple - FXMLLoader can just ignore the IllegalAccessException when attempting to inject these fields. If Initializable is ever deprecated or removed, FXMLLoader can (should) revert to throwing in this case.