What will be printed if the user clicks button $1,$ button $1$ again, then button $2?$ public class ButtonApp extends Application $\{$

private boolean enabled $=$ false;

@override

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

Button button$1=$ new Button$("$Enable$")$;

button$1.$setOnAction$($e $->\{$

enabled $=$ true;

System.out.println$("$Enabled: $"+$ enabled$)$;

$\})$;

Button button$2=$ new Button$("$Check Enabled"$)$;

button$2.$setOnAction$($e $->\{$

if $($enabled$)\{$

System.out.println$("$The app is enabled."$)$;

$\}$ else $\{$

System.out.println$("$The app is disabled."$)$;

$\}$

$\})$;

VBox layout $=$ new VBox$(10)$;

layout.getChildren$().$addAll$($button$1,$ button$2)$;

Scene scene $=$ new Scene$($layout$,300,200)$;

primaryStage.setScene$($scene$)$;

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

primaryStage.show$()$;

$\}$

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

launch$($args$)$;

$\}$

$\}$