Ordnerstruktur richtig

src/main/java/de/uni_hannover/swt/tictactoe/HelloApplication.java → src/main/java/de/uni_hannover/swt/tictactoe/Main.java

@@ -7,10 +7,10 @@ import javafx.stage.Stage;
 
 import java.io.IOException;
 
-public class HelloApplication extends Application {
+public class Main extends Application {
     @Override
     public void start(Stage stage) throws IOException {
-        FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("hello-view.fxml"));
+        FXMLLoader fxmlLoader = new FXMLLoader(Main.class.getResource("hello-view.fxml"));
         Scene scene = new Scene(fxmlLoader.load(), 320, 240);
         stage.setTitle("Hello!");
         stage.setScene(scene);
@@ -20,4 +20,4 @@ public class HelloApplication extends Application {
     public static void main(String[] args) {
         launch();
     }
-}
\ No newline at end of file
+}

src/main/java/de/uni_hannover/swt/tictactoe/HelloController.java → src/main/java/de/uni_hannover/swt/tictactoe/controller/MainController.java

-package de.uni_hannover.swt.tictactoe;
+package de.uni_hannover.swt.tictactoe.controller;
 
 import javafx.fxml.FXML;
 import javafx.scene.control.Label;
 
-public class HelloController {
+public class MainController {
     @FXML
     private Label welcomeText;
 

src/main/java/module-info.java

@@ -5,4 +5,6 @@ module de.uni_hannover.swt.tictactoe {
 
     opens de.uni_hannover.swt.tictactoe to javafx.fxml;
     exports de.uni_hannover.swt.tictactoe;
+    exports de.uni_hannover.swt.tictactoe.controller;
+    opens de.uni_hannover.swt.tictactoe.controller to javafx.fxml;
 }
\ No newline at end of file

src/main/resources/de/uni_hannover/swt/tictactoe/hello-view.fxml

@@ -6,7 +6,7 @@
 
 <?import javafx.scene.control.Button?>
 <VBox alignment="CENTER" spacing="20.0" xmlns:fx="http://javafx.com/fxml"
-      fx:controller="de.uni_hannover.swt.tictactoe.HelloController">
+      fx:controller="de.uni_hannover.swt.tictactoe.controller.MainController">
     <padding>
         <Insets bottom="20.0" left="20.0" right="20.0" top="20.0"/>
     </padding>