java fxml button event 생성 후 button method에서 1) 모달로 띄우기void 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")..