JavaFX, full screen: app blinks when alert is shown -

i have simple application in javafx: full screen stage 1 exit button. problem time time (no idea why not always) after clicking on "exit" button application blinks (seems minimized , maximized in miliseconds). ideas?

import javafx.application.application; import javafx.application.platform; import javafx.scene.scene; import javafx.scene.control.alert; import javafx.scene.control.button; import javafx.scene.control.buttontype; import javafx.scene.input.keycombination; import javafx.scene.layout.vbox; import javafx.stage.modality; import javafx.stage.stage; import javafx.stage.stagestyle;     import java.util.optional;  public class fullscreenexample extends application {         public static void main(string[] args) {         launch(args);     }      @override     public void start(stage stage) {         button button = new button("exit");         button.setonaction(event -> {             alert alert = new alert(alert.alerttype.confirmation);             alert.initowner(stage);             alert.initstyle(stagestyle.undecorated);             alert.initmodality(modality.window_modal);             optional<buttontype> result = alert.showandwait();             if (result.get() == buttontype.ok){                 platform.exit();             }         });         vbox box = new vbox();         box.getchildren().add(button);         final scene scene = new scene(box);         scene.setfill(null);         stage.setscene(scene);         stage.setfullscreenexithint("");         stage.setfullscreenexitkeycombination(keycombination.no_match);         stage.setfullscreen(true);         stage.show();     } } 

you using stage style undecorated:

  alert.initstyle(stagestyle.undecorated);  

try use

alert.initstyle(stagestyle.transparent); 

this fixes blinking.

its known issue undecorated frame in windows.