javafx - 为什么我的 TableView 没有刷新或自动更新？

Question

我尝试了很多，但是当单击添加按钮时，我在文本字段中输入的值没有填充到 TableView 中。请给我一个解决方案，以便在我单击添加按钮时将值填充到 TableView 中!

 public class Refreshtable  extends Application {
  @FXML
   private TextField fname;
    private final TableView<Person> table = new TableView<>();
   private final ObservableList<Person> data =
            FXCollections.observableArrayList(
            new Person("Jacob"));
   final HBox hb = new HBox();
 public static void main(String[] args) {
        launch(args);
    }
     @Override
    public void start(Stage primarystage) {
        Scene scene = new Scene(new Group());
//        this.primaryStage.setTitle("Table View Sample");
      primarystage.setWidth(450);
     primarystage.setHeight(550);

        final Label label = new Label("Address Book");
        label.setFont(new Font("Arial", 20));

        table.setEditable(true);

        TableColumn firstNameCol = new TableColumn("First Name");
        firstNameCol.setMinWidth(100);
        firstNameCol.setCellValueFactory(
                new PropertyValueFactory("firstName"));
 table.setItems(data);
        table.getColumns().addAll(firstNameCol);
    final Button addButton = new Button("Add");
        addButton.setOnAction((ActionEvent e) -> {
          System.out.println("u entered");
           try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(Refreshtable.class.getResource("newaddframe.fxml"));
     AnchorPane anchorpane = (AnchorPane) loader.load();
       Stage dialogStage = new Stage();
        dialogStage.setTitle("Main");
            dialogStage.initModality(Modality.WINDOW_MODAL);
       Scene scenee = new Scene(anchorpane);
            dialogStage.setScene(scenee);
dialogStage.showAndWait();
           } catch (IOException es) {
            es.printStackTrace();}
        });
        hb.getChildren().addAll(addButton);
         final VBox vbox = new VBox();
        vbox.setSpacing(5);
        vbox.setPadding(new Insets(10, 0, 0, 10));
        vbox.getChildren().addAll( table, hb);

        ((Group) scene.getRoot()).getChildren().addAll(vbox);

  primarystage.setScene(scene);
        primarystage.show();
    }
    @FXML
    private void addd(){
    data.add(new Person(
                    fname.getText()));
            fname.clear();

            }
 public static class Person {
 private final SimpleStringProperty firstName;
 private Person(String fName) {
 this.firstName = new SimpleStringProperty(fName);
         }
 public String getFirstName() {
            return firstName.get();
        }
 public void setFirstName(String fName) {
            firstName.set(fName);
        }


    }
} 

Answer 1

我不会谈论您的代码的(许多)问题，并保持简短的回答，解决您的原始问题。

您需要将用户输入的数据添加到支持 TableView 的 ObservableList。

@FXML
private void update()
{ 
   ...
   // Create new instance of UserData
   UserData userData = new UserData(name.getText(), country.getText());
   // Add it to the backing list
   data.add(userData);
}