java - JavaFX fade out stage and close -

i'm having difficulty finding out if possible. common behavior people want fade out extension of node, entirely possible through fadetransition

however, i'm trying fade out entire stage, imagine closing running program , instead of killing windows (i.e. showing -> not showing), window (stage) fade out on 2 seconds toast or notification would.

create timeline keyframe changes opacity of stage's scene's root node. make sure set stage style , scene fill transparent. make program exit once timeline finished.

below application single big button that, when clicked, take 2 seconds fade away, , program close.

public class stagefadeexample extends application {      @override     public void start(stage arg0) throws exception {         stage stage = new stage();         stage.initstyle(stagestyle.transparent); //removes window decorations          button close = new button("fade away");         close.setonaction((actionevent) ->  {             timeline timeline = new timeline();             keyframe key = new keyframe(duration.millis(2000),                            new keyvalue (stage.getscene().getroot().opacityproperty(), 0));              timeline.getkeyframes().add(key);                timeline.setonfinished((ae) -> system.exit(1));              timeline.play();         });          scene scene = new scene(close, 300, 300);         scene.setfill(color.transparent); //makes scene background transparent         stage.setscene(scene);         stage.show();     }      public static void main (string[] args) {         launch();     } }