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Java Build a JavaFX Application Design a Better App Add a node via FXML

Tojo Alex
PLUS
Tojo Alex
Courses Plus Student 13,331 Points
Posted by Tojo Alex
Tojo Alex
Courses Plus Student 13,331 Points

Help needed

Where am I wrong : Bummer: java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.util.concurrent.ExecutionException: javafx.fxml.LoadException: GridPane.rowIndex is not a valid attribute. /workdir/com/example/boombox.fxml:12 (Look around WaitForAsyncUtils.java line 150)

com/example/boombox.fxml 
<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>
<VBox fx:controller="com.example.Controller"
      xmlns:fx="http://javafx.com/fxml">

    <!-- Add your element below -->
  <Text boombox="Boombox"
        GridPane.rowIndex="0"
        GridPane.columnSpan="2"
        Gridpane.halignment="CENTER"/>


    <Button text="Play"/>
<
com/example/Main.java 
package com.example;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Parent root = FXMLLoader.load(getClass().getResource("boombox.fxml"));
        primaryStage.setTitle("Boombox");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


    public static void main(String[] args) {
        launch(args);
    }
}
com/example/Controller.java 
package com.example;

public class Controller {
}