FXMLController.java

    @FXML
    public void addressTextFieldAction(ActionEvent event) {
        geocodingService.geocode(address.get(), (GeocodingResult[] results, GeocoderStatus status) -> {
            
            LatLong latLong = null;
            
            if( status == GeocoderStatus.ZERO_RESULTS) {
                Alert alert = new Alert(Alert.AlertType.ERROR, "No matching address found");
                alert.show();
                return;
            } else if( results.length > 1 ) {
                Alert alert = new Alert(Alert.AlertType.WARNING, "Multiple results found, showing the first one.");
                alert.show();
                latLong = new LatLong(results[0].getGeometry().getLocation().getLatitude(), results[0].getGeometry().getLocation().getLongitude());
            } else {
                latLong = new LatLong(results[0].getGeometry().getLocation().getLatitude(), results[0].getGeometry().getLocation().getLongitude());
            }
            
            map.setCenter(latLong);

        });
    }