Switched UI over to using SceneBuilder.

src/main/java/module-info.java

@@ -1,4 +1,5 @@
 module net.cuprak.sample {
     requires javafx.controls;
+    requires javafx.fxml;
     exports net.cuprak.sample;
 }

src/main/java/net/cuprak/sample/Controller.java

@@ -0,0 +1,13 @@
+package net.cuprak.sample;
+
+import javafx.fxml.Initializable;
+import java.net.URL;
+import java.util.ResourceBundle;
+
+public class Controller implements Initializable {
+
+    @Override
+    public void initialize(URL location, ResourceBundle resources) {
+        // Initialize your controller
+    }
+}

src/main/java/net/cuprak/sample/JavaFXSkeletonApp.java

@@ -1,19 +1,32 @@
 package net.cuprak.sample;
 
 import javafx.application.Application;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
 import javafx.stage.Stage;
 
+import java.io.IOException;
+import java.util.ResourceBundle;
+
+/**
+ * Skeleton Application
+ */
 public class JavaFXSkeletonApp extends Application {
 
     public static void main(String[] args) {
         launch();
     }
 
     @Override
-    public void start(Stage stage) {
-        stage.setTitle("Demo Application");
-        int width = 640;
-        int height = 480;
+    public void start(Stage stage) throws IOException {
+        ResourceBundle bundle = ResourceBundle.getBundle("net.cuprak.sample.resources");
+        FXMLLoader loader = new FXMLLoader(getClass().getResource("/net/cuprak/sample/App.fxml"),bundle);
+        Parent root = loader.load();
+        Controller controller = loader.getController();
+        Scene scene = new Scene(root);
+        stage.setScene(scene);
+        stage.setTitle(bundle.getString("appTitle"));
         stage.show();
     }
 

src/main/resources/net/cuprak/sample/App.fxml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.layout.FlowPane?>
+
+
+<FlowPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/21" xmlns:fx="http://javafx.com/fxml/1">
+   <children>
+      <Label text="%helloWorld" />
+   </children>
+</FlowPane>

src/main/resources/net/cuprak/sample/resources.properties

@@ -0,0 +1,2 @@
+helloWorld=Hello World!
+appTitle=JavaFX Skeleton