$//$ E$1$

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.control.Label;

import javafx.scene.layout.VBox;

import javafx.stage.Stage;

public class E$1$ extends Application $\{$

public static void main$($String$[]$ args$)\{$

launch$($args$)$;

$\}$

@Override

public void start$($Stage primaryStage$)\{$

$//$ Create a label to display the "Hello, JavaFX!" message.

Label helloLabel $=$ new Label$("$ Hello, JavaFX!"$)$;

$//$ Create labels to display the Java and JavaFX versions.

Label javaVersionLabel $=$ new Label$("$ Java Version: $"+$ System.getProperty$("$java$.$version"$))$;

Label javafxVersionLabel $=$ new Label$("$ JavaFX Version: $"+$ System.getProperty$("$javafx$.$version"$))$;

$//$ Create a VBox layout to arrange the labels vertically.

VBox root $=$ new VBox$(10)$; $//10$ is the spacing between elements.

root.getChildren$().$addAll$($helloLabel$,$ javaVersionLabel, javafxVersionLabel$)$;

$//$ Create the scene and set it in the stage.

Scene scene $=$ new Scene$($root$,300,150)$; $//$ Width and height of the window.

primaryStage.setScene$($scene$)$;

$//$ Set the title of the window.

primaryStage.setTitle$("$Hello JavaFX App"$)$;

$//$ Show the window.

primaryStage.show$()$;

$\}$

$\}$ Add quit button in program give me whole program again after add for quit button.