fxml의 button에서 다른 fxml 띄우기

java fxml button event 생성 후

button method에서 

1) 모달로 띄우기

void onAuthCodeGrantClick(ActionEvent event) {         FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/fxml/AuthenticationCode.fxml"));         Parent root1;         Stage stage;         try {             root1 = (Parent) fxmlLoader.load();             stage = new Stage();             stage.initModality(Modality.APPLICATION_MODAL);             stage.initStyle(StageStyle.UNDECORATED);             stage.setTitle("ABC");             stage.setScene(new Scene(root1));               stage.show();         } catch (IOException ex) {             Logger.getLogger(JanusAgentController.class.getName()).log(Level.SEVERE, null, ex);         }     }

2) 윈도우로 띄우기 (프레임)

try {         FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/fxml/AuthenticationCode.fxml"));                 Parent root1 = (Parent) fxmlLoader.load();                 Stage stage = new Stage();                 stage.setScene(new Scene(root1));                 stage.setTitle("Authentication Code Grant");                 stage.show();         } catch(Exception e) {            e.printStackTrace();         }