Simple JavaFX App

src/main/java/de/kneitzel/JavaFXApp.java

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+package de.kneitzel;
+
+import javafx.application.Application;
+import javafx.event.ActionEvent;
+import javafx.event.EventHandler;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.layout.StackPane;
+import javafx.stage.Stage;
+
+public class JavaFXApp extends Application {
+
+	@Override
+	public void start(Stage primaryStage) {
+		primaryStage.setTitle("Hello World!");
+		Button btn = new Button();
+		btn.setText("Say 'Hello World'");
+		btn.setOnAction(e -> System.out.println("Hello World!"));
+
+		StackPane root = new StackPane();
+		root.getChildren().add(btn);
+		primaryStage.setScene(new Scene(root, 300, 250));
+		primaryStage.show();
+	}
+
+	public static void main(String[] args) {
+		launch(args);
+	}
+	   
+}

src/main/java/module-info.java

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+module FXAppModule {
+    requires javafx.base;
+    requires javafx.graphics;
+    requires javafx.controls;
+    requires javafx.web;
+
+    exports de.kneitzel;
+    opens de.kneitzel;
+}