Reusable controllers in FXML. One controller (slightly changed) for multiple fxml files

Question

I would like to know whether it is possible to "reuse" the controller for another fxml after creating it. In other words, can I create a controller for fxml, modify it a bit, and then use (another instance of) it for another fxml without affecting the first one. Otherwise, I am in a way forced to copy the code from the controller, apply the changes and then use the new one.

Answer 1

I don't see many use cases for this, as you will obviously have different controls in different FXML files, so it's not clear how you would manage injection. If you do have a use case (eg the different FXML files just have different layouts for the same basic UI), it is possible:

Remove the fx:controller attribute from the FXML files, and set the controller manually using the following pattern:

FXMLLoader loader = new FXMLLoader(getClass().getResource("/path/to/file.fxml"));
MyConfigurableController controller = new MyConfigurableController(aParam, anotherParam);
loader.setController(controller);
Parent root = loader.load();