Unknown Path FXML document

We're writing an Java application using JavaFX. At this time we have 3 different forms:

• Login
• Game window
• Registration

For our next iteration, we want to implement the Registration form, but we get the IOException error Unknown Path

It's about this piece of code:

FXMLLoader registrationLoader = new FXMLLoader(); try{ mainroot = (Parent)registrationLoader.load(this.getClass().getResource("FXMLRegistration.fxml").openStream()); Stage registrationStage = new Stage(); Scene scene = new Scene(mainroot); registrationStage.setScene(scene); registrationStage.setTitle("Register your account"); registrationStage.show(); } catch(IOException ex) { System.out.print(ex.getMessage()); } 

The above code is working when I change FXMLRegistration.fxml to FXMLDocument.fxml or FXMLLoader.fxml.

When I change

mainroot = (Parent)registrationLoader.load(this.getClass().getResource("FXMLRegistration.fxml").openStream()); 

to

mainroot = (Parent)registrationLoader.load(Paths.get("src/hackattackfx/FXMLRegistration.fxml").toUri().toURL()); 

source

I get the absolute path in the debugger output, which is correct when I use it with the file command in terminal.

I hope someone could help us with this error.

Thanks in advance!

EDIT

I Changed some code to the following:

FXMLLoader registrationLoader = new FXMLLoader(getClass().getResource("/FXMLRegistration.fxml")); mainroot = (Parent)registrationLoader.load(); 

but this will return an IllegalStateException: Location is not set. When I remove / before /FXMLRegistration.fxml, I get to my catch block printing the full path of the file:

file:/Users/juleskreutzer/Documents/github/PTS3/HackAttackFX/dist/run1793658053/HackAttackFX.jar!/hackattackfx/FXMLRegistration.fxml

Also changing the path to src/hackattackfx/FXMLRegistration.fxml will give the IllegalStateException: Location not set.

Project Structure

We use different packages in our application. all these packages are within the default package: hackattackfx

The packages in the default package are:

• Default Package
  • Exceptions
  • Interfaces
  • enums
  • Resources
  • Templates
• JSON Package

My FXML documents are located in the default package (hackattackfx). If it's not 100% clear how I arranged my files, please take a look at my Github repo