gistfile1.java

public class Controller implements BidListener{

    //Bid emulator
    private static BidEmulator bidEmulator;

    @FXML
    TextArea simulatorConsole;

    @FXML
    private void handleStartSimulationButtonClicked(ActionEvent ae){
        //Initialize bid emulator
        bidEmulator = new BidEmulator();
        //Register this class as a listener
        bidEmulator.addListener(this);
        //start bidding process emulation
        Timer timer = new Timer();
        timer.scheduleAtFixedRate(bidEmulator, 0, 100);
    }

    @Override
    public void bidEvent(Bid bid) {
        Platform.runLater(() -> simulatorConsole.setText(simulatorConsole.getText() +"Received a new bid!\n" ));
    }
    
}