Prueba y enunciado

src/sample/Main.java

@@ -18,6 +18,7 @@ public class Main extends Application {
 
 
     public static void main(String[] args) {
-        launch(args);
+        //launch(args);
+        System.out.println("Hola Mundo");
     }
 }

src/sample/sample.fxml

@@ -1,8 +1,3 @@
-<?import javafx.geometry.Insets?>
-<?import javafx.scene.layout.GridPane?>
-
-<?import javafx.scene.control.Button?>
-<?import javafx.scene.control.Label?>
 <GridPane fx:controller="sample.Controller"
           xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
 </GridPane>