嵌套子调用超级父级

Question

我是javafx的新手，所以请忽略我的愚蠢问题，这是我面临的问题，从2天开始，如果有任何身体帮助我，我们会很好吗 我在那个国家的超级父母（主视图）fxml视图获取加载器 在国家fxml我有一个加载到国家的fxml（调用表） 当用户点击表视图的任何数据新fxml文件加载和该文件我想加载到父我已经使用超级父堆栈窗格ID它抛出一个错误请帮助我为什么这发生任何解决方案链接，代码或建议它会节省我的一天 这是代码

ObservableList<addcountryController> data = FXCollections.observableArrayList();
private Pagination pagination;
@FXML
private AnchorPane cresult;
@FXML
private StackPane stackconsearch;
@FXML
private StackPane stackhome;
@FXML
private AnchorPane stackanc;
@FXML
private StackPane stackcountry;
@FXML
private TableView<addcountryController> tableUser;
@FXML
private TableColumn<addcountryController, String> columnName;
@FXML
private TableColumn<addcountryController, String> columnDesc;
DatabaseHandler databaseHandler;

public void setText(String first,String sec){
    this.country.setText(first);
    this.desc.setText(sec);
}


@Override
public void initialize(URL location, ResourceBundle resources) {
    databaseHandler = DatabaseHandler.getInstance();
    initCol();

        String qu = "SELECT * FROM country_tbl ";
        ResultSet rs = databaseHandler.execQuery(qu);
            try {
                while (rs.next()) {
                 String id= rs.getString("id");
                 String name= rs.getString("countryname");
                 String description = rs.getString("descr");
                 String country2char= rs.getString("country2char");
                 String descrshort = rs.getString("descrshort");
                 data.add(new addcountryController(id,name, description,country2char,descrshort));
                }
            }catch (SQLException ex) {
                Logger.getLogger(addcountryController.class.getName()).log(Level.SEVERE, null, ex);
            }

         tableUser.setItems(null);
         tableUser.setItems(data);

         tableUser.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
         tableUser.getSelectionModel().getSelectedItems().addListener(new ListChangeListener<addcountryController>() {
         public void onChanged(ListChangeListener.Change<? extends addcountryController> c) {
             try {

                 Stage primaryStage=new Stage();
                 FXMLLoader loader =new FXMLLoader();
                 loader.load(getClass().getResource("/region/updatecountry.fxml").openStream());
                 updatecountryController usercontroller=(updatecountryController)loader.getController();
                    for (addcountryController p : c.getList()) {
                     String ADDID=p.getId();
                     String ADD=p.getName();    
                     String ADD1=p.getDescriptionshort();
                     String ADD2=p.getDescription();
                     String ADD3=p.getCountrychar();
                     usercontroller.setText(ADDID,ADD,ADD1,ADD2,ADD3);
                   }
                    StackPane root = loader.getRoot();                      
                    stackconsearch.getChildren().clear();
                    stackconsearch.getChildren().add(root);


             } catch (IOException e) {
                e.printStackTrace();
             }
          }
        });
}

这是我的编辑控制器

         private StackPane stackhome;
@FXML
private StackPane stackconsearch;
@FXML
private AnchorPane cresult;
@FXML
private TextField country;
@FXML
private TextField desc;

public void add(ActionEvent event) {
    String ADD=countrycode.getText();
    try {
        if(ADD.isEmpty()){
                Alert alert=new Alert(Alert.AlertType.ERROR);
                alert.setHeaderText(null);
                alert.setContentText("Please Fill All DATA");
                alert.showAndWait();
                return;
        }
        FXMLLoader loader =new FXMLLoader();
        loader.load(getClass().getResource("/region/newCountry.fxml").openStream());

        MainController usercontroller=(MainController)loader.getController();
        usercontroller.setText(ADD);
        StackPane root = loader.getRoot();
        stackconsearch.getChildren().clear();
        stackconsearch.getChildren().add(root);

        }catch(Exception e) {
            e.printStackTrace();
    }

}

public void search(ActionEvent event) {
    String countrytxt=country.getText();
    String desctxt=desc.getText();
    if(countrytxt.isEmpty() && desctxt.isEmpty())   {
        try{
            FXMLLoader fxmlLoader = new FXMLLoader();
            fxmlLoader.load(getClass().getResource("/region/cresult.fxml").openStream());

            StackPane root = fxmlLoader.getRoot();
            root.getStylesheets().add(getClass().getResource("/application/application.css").toExternalForm());

            countryController usercontroller=(countryController)fxmlLoader.getController();
            usercontroller.setText(countrytxt,desctxt);
            cresult.getChildren().clear();
            cresult.getChildren().add(root);        
        }catch(IOException e){
            e.printStackTrace();
        }
    }else{
        try{
            FXMLLoader fxmlLoader = new FXMLLoader();
            fxmlLoader.load(getClass().getResource("/region/cresult.fxml").openStream());
            StackPane root = fxmlLoader.getRoot();
            countryController usercontroller=(countryController)fxmlLoader.getController();
            usercontroller.setText(countrytxt,desctxt);
            cresult.getChildren().clear();
            cresult.getChildren().add(root);        
        }catch(IOException e){
            e.printStackTrace();
        }
    }
}

这里是主控制器

  @FXML
private StackPane stackhome;
@FXML
private AnchorPane Mainview;
@FXML
private AnchorPane stackanc;
@Override
public void start(Stage primaryStage) {
    try {
        Parent root =FXMLLoader.load(getClass().getResource("Main.fxml"));
        Scene scene = new Scene(root);
        scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
        primaryStage.setScene(scene);
        primaryStage.show();
    } catch(Exception e) {
        e.printStackTrace();
    }
}

@FXML
public void country(ActionEvent event) {

     FXMLLoader fxmlLoader = new FXMLLoader();
        try {
            fxmlLoader.load(getClass().getResource("/region/country.fxml").openStream());
        } catch (IOException e) {

        }
        StackPane root = fxmlLoader.getRoot();
        stackhome.getChildren().clear();
        stackhome.getChildren().add(root);
}

public static void main(String[] args) {
    launch(args);
}

这里是stackhome是超级父级，stackcountry是超级父级的父级和子级，我还有一个父stacksub，它是stackhome，stackcountry的子级，它有一个叫做stackchild的子项我想把这个stackchild加载到stackhome但是它不是提出任何建议