How to correctly organize the transmission of an event from a separate thread to the GUI on JavaFx?

Question

Java

I have a MainController and a UDPServer class that spins in a separate thread and waits for a message, when a message arrives I need to display it on the GUI. How to organize such interaction?

public class UDPServer implements Runnable {

    // ...

    @Override
    public void run() {

        // ...

        if(message.equals("N1-M")){

            // пришло сообщение и нужно отобразить его в GUI
            // в моем случае отобразить значит изменить цвет vRectangle            
        }

        // ...
    }
}


public class MainController {

    // ...

    @FXML Rectangle vRectangle;

    // ...
}

Answer 1

When you need to perform some action on the JavaFx thread, you need to call Platform.runLater(Runnable r). Those. In the argument, you specify the action that will then be performed. The action is non-blocking and asynchronous. Waiting for the end of this action is already a more difficult task and quite another.