JavaFX app in System Tray

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Wrap the code in the actionListener which calls back to JavaFX in Platform.runLater. This will execute the code which interfaces with the JavaFX system on the JavaFX application thread rather than trying to do it on the Swing event thread (which is what is causing you issues).

For example:

ActionListener listenerTray = new ActionListener() {                
  @Override public void actionPerformed(java.awt.event.ActionEvent event) {
    Platform.runLater(new Runnable() {
      @Override public void run() {
        primaryStage.hide();
      }
    });
  }                   
};

By default the application will shutdown when it’s last window is hidden. To override this default behaviour, invoke Platform.setImplicitExit(false) before you show the first application Stage. You will then need to explicitly call Platform.exit() when you need the application to really shutdown.

I created a demo for using the AWT system tray within a JavaFX application.

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