this.currentLocationProperty = this.webEngine.locationProperty();
        currentLocationProperty.addListener(new ChangeListener<String>() {
            @Override
            public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
                log.debug("new URL: {}", newValue);
                if (newValue.contains("access_token")) {
                    log.debug("TOKEN!!!!");
                    token1 = "kuku";
                }
            }
        });

    public String getToken1() {
        return token1;
    }

   public void connect()  {

        log.info("Get access token");
        // получаем URL аутентификации
        String sUrl = UrlCreator.getAuthUrl(Constants.getApplId(), Constants.getScopes());
        log.debug("sUrl: {}", sUrl);

        webEngine.load(sUrl);
}

public class Fb2App extends Application {
    @Override
    public void start(Stage primaryStage) throws Exception {
....

       Parent parent = factory_gui.createLoginForm();
        Scene scene1 = new Scene(parent, 400, 250);
        primaryStage.setScene(scene1);

        DM_Login dm_login = factory_gui.getDm_login();

        dm_login.connect();
        primaryStage.show();
        Thread.sleep(1000);

//        while (dm_login.getToken1() == null) {
//            Thread.sleep(1000);
//        }

        System.out.println("dm_login.getToken1() " + dm_login.getToken1());



    }