ExpenseManager/ ├── src/main/java/com/example/expensemanager │ ├── HelloApplication.java │ ├── HelloController.java │ └── Expense.java ...

If you don't use Java modules in your application, you also have to import the javafx.controls and javafx.fxml modules: Then, take a look at the JavadocViewerApp class of javadocviewer-app to see an ...