What will be displayed on the button? import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.image.Image;

import javafx.scene.image.ImageView;

import javafx.scene.layout.StackPane;

import javafx.stage.Stage;

public class ImageButtonExample extends Application $\{$

@Override

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

Image img $=$ new Image$("$file:icon.png$")$;

ImageView imageView $=$ new ImageView$($img$)$;

Button button $=$ new Button$("",$ imageView$)$;

StackPane layout $=$ new StackPane$()$;

layout.getChildren$().$add$($button$)$;

Scene scene $=$ new Scene$($layout$,400,400)$;

primaryStage.setScene$($scene$)$;

primaryStage.setTitle$("$Image Button Example"$)$;

primaryStage.show$()$;

$\}$

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

launch$($args$)$;

$\}$

$\}$