JavaFX app in System Tray

Question

I am Making a Simple App using JavaFX UI, The app simply just do that:

• has a systray icon, which when clicked shows a window, when clicked again hides it, on

Answer 1

You should only modify the javafx classes on the javafx thread, the listeners on the tray icon are likely to be running on the swing thread. You can do this by posting a runnable to Platform#runLater like so:

Platform.runLater(new Runnable() {
    public void run() {
        primaryStage.hide();
    }
});