I have application written in JavaFX and I set primary stage as full screen and always on top:
primaryStage.setFullScreen(true);
primaryStage.setFullScreenExitHint("");
primaryStage.setFullScreenExitKeyCombination(KeyCombination.NO_MATCH);
primaryStage.setAlwaysOnTop(true);
In background thread I start another application and window from this application appears over my window (this window have also probably property "always on top").
How can I configure my window to be always on top?