“view.Public void start ( Stage primaryStage ) throws Exception Scene Builder If it is inside a certain package, you should specify your package name along with the controller class name with the following convention:įor example: If your controller class named ‘viewController’ is inside the package named ‘view’, you must assign your controller to the FXML file following the method below: Now, before you assign the controller class to the FXML file, it is important for you to know where your controller class is. Remember, this feature is not available for previous versions of scene builder.

If you are using Scene Builder V 2.0, you should be able to see a tab named ‘controller’ on the bottom left corner when you launch scene builder. Assigning Controller from Scene Builder.Below are two different ways of assigning a controller to any FXML files. No matter which process you follow, the result of either process is still the same. If your console is throwing you “no controller assigned” problem when you launch the application, this fresh tutorial from mid-2019 will definitely help you solve the problem and get the ball rolling.įrom the advent of Scene Builder V 2.0, you can assign your FXML controller either manually inside the FXML file or through the scene builder window.

This creates clouds of confusion around new learners which is why I am writing this article.

As the version of Java and Scene Builder is continuously progressing, hundreds of online answers that were effective before are obsolete now. Recently, I came across a problem in my Java application that I thought has a very simple getaway.

How to use eclipse with scene builder