Почему мой TableView не обновляется или автоматически обновляется?

Question

Я пробовал много, но мое значение, введенное в текстовое поле не получает заселена к Tableview когда кнопка Добавить clicked.Please дать мне решение для заполнения значений в Tableview всякий раз, когда я нажимаю на кнопку добавления!

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

Пример кода обновления TableView:

Cloud.java

public class Cloud extends Application { 

    private Stage primaryStage; 
    private BorderPane rootLayout; 

    /** 
    * The data as an observable list of Persons. 
    */ 
    private ObservableList<Person> personData = FXCollections.observableArrayList(); 

    /** 
    * Constructor 
    */ 
    public Cloud() { 
    } 

    /** 
    * Returns the data as an observable list of Persons. 
    * @return 
    */ 
    public ObservableList<Person> getPersonData() { 
     return personData; 
    } 

    @Override 
    public void start(Stage primaryStage) { 
     this.primaryStage = primaryStage; 
     this.primaryStage.setTitle("AddressApp"); 

     // Set the application icon. 
     this.primaryStage.getIcons().add(new Image("file:resources/images/address_book_32.png")); 



     showPersonOverview(); 
    } 

    /** 
    * Initializes the root layout and tries to load the last opened 
    * person file. 
    */ 


    /** 
    * Shows the person overview inside the root layout. 
    */ 
    public void showPersonOverview() { 
     try { 
      // Load person overview. 
      FXMLLoader loader = new FXMLLoader(); 
      loader.setLocation(Cloud.class.getResource("root.fxml")); 
      AnchorPane personOverview = (AnchorPane) loader.load(); 
Stage dialogStagee = new Stage(); 
      dialogStagee.setTitle("Edit Person"); 
      dialogStagee.initModality(Modality.WINDOW_MODAL); 
      dialogStagee.initOwner(primaryStage); 
      Scene scene = new Scene(personOverview); 
      dialogStagee.setScene(scene); 



      // Give the controller access to the main app. 
      rootcontroller controller = loader.getController(); 
      controller.setMainApp(this); 
dialogStagee.showAndWait(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    /** 
    * Opens a dialog to edit details for the specified person. If the user 
    * clicks OK, the changes are saved into the provided person object and true 
    * is returned. 
    * 
    * @param person the person object to be edited 
    * @return true if the user clicked OK, false otherwise. 
    */ 
    public boolean showPersonEditDialog(Person person) { 
     try { 
      // Load the fxml file and create a new stage for the popup dialog. 
      FXMLLoader loader = new FXMLLoader(); 
      loader.setLocation(Cloud.class.getResource("add.fxml")); 
      AnchorPane page = (AnchorPane) loader.load(); 

      // Create the dialog Stage. 
      Stage dialogStage = new Stage(); 
      dialogStage.setTitle("Edit Person"); 
      dialogStage.initModality(Modality.WINDOW_MODAL); 
      dialogStage.initOwner(primaryStage); 
      Scene scene = new Scene(page); 
      dialogStage.setScene(scene); 

      // Set the person into the controller. 
      addcontroller controller = loader.getController(); 
      controller.setDialogStage(dialogStage); 
      controller.setPerson(person); 

      // Set the dialog icon. 
      dialogStage.getIcons().add(new Image("file:resources/images/edit.png")); 

      // Show the dialog and wait until the user closes it 
      dialogStage.showAndWait(); 


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

     } 
     return false; 
    } 


    public Stage getPrimaryStage() { 
     return primaryStage; 
    } 

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

Person.java

public class Person { 

    private final StringProperty firstName; 
    private final StringProperty lastName; 


    /** 
    * Default constructor. 
    */ 
    public Person() { 
     this(null, null); 
    } 

    /** 
    * Constructor with some initial data. 
    * 
    * @param firstName 
    * @param lastName 
    */ 
    public Person(String firstName, String lastName) { 
     this.firstName = new SimpleStringProperty(firstName); 
     this.lastName = new SimpleStringProperty(lastName); 


    } 

    public String getFirstName() { 
     return firstName.get(); 
    } 

    public void setFirstName(String firstName) { 
     this.firstName.set(firstName); 
    } 

    public StringProperty firstNameProperty() { 
     return firstName; 
    } 

    public String getLastName() { 
     return lastName.get(); 
    } 

    public void setLastName(String lastName) { 
     this.lastName.set(lastName); 
    } 

    public StringProperty lastNameProperty() { 
     return lastName; 
    } 


} 

addcontroller.java

 public class addcontroller { 

      @FXML 
      private TextField firstNameField; 
      @FXML 
      private TextField lastNameField; 



      private Stage dialogStage; 
      private Person person; 
      // private boolean okClicked = false; 



      public void setDialogStage(Stage dialogStage) { 
       this.dialogStage = dialogStage; 
      } 

      /** 
      * Sets the person to be edited in the dialog. 
      * 
      * @param person 
      */ 
      public void setPerson(Person person) { 
       this.person = person;} 


      @FXML 
      private void handleOk() { 

        person.setFirstName(firstNameField.getText()); 
        person.setLastName(lastNameField.getText()); 

        dialogStage.close(); 

      } 
     } 

rootcontroller.java

public class rootcontroller { 
      @FXML 
      private TableView<Person> personTable; 
      @FXML 
      private TableColumn<Person, String> firstNameColumn; 
      @FXML 
      private TableColumn<Person, String> lastNameColumn; 



      // Reference to the main application. 
      private Cloud mainApp; 

      /** 
      * The constructor. 
      * The constructor is called before the initialize() method. 
      */ 
      public rootcontroller() { 
      } 
      @FXML 
      private void initialize() { 
       // Initialize the person table with the two columns. 
       firstNameColumn.setCellValueFactory(cellData -> cellData.getValue().firstNameProperty()); 
       lastNameColumn.setCellValueFactory(cellData -> cellData.getValue().lastNameProperty()); 
       } 

      public void setMainApp(Cloud mainApp) { 
       this.mainApp = mainApp; 
       personTable.setItems(mainApp.getPersonData()); 
      } 
      @FXML 
      private void handleNewPerson() { 
       Person tempPerson = new Person(); 
       System.out.println("1"); 
       mainApp.showPersonEditDialog(tempPerson); 
      mainApp.getPersonData().add(tempPerson); 

      } 
      } 

root.fxml

<AnchorPane id="AnchorPane" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="cloud.rootcontroller"> 
     <children> 
      <TableView fx:id="personTable" layoutX="215.0" layoutY="106.0" prefHeight="200.0" prefWidth="200.0"> 
      <columns> 
       <TableColumn fx:id="firstNameColumn" prefWidth="75.0" text="name" /> 
       <TableColumn fx:id="lastNameColumn" prefWidth="75.0" text="country" /> 
      </columns> 
      </TableView> 
      <Button layoutX="415.0" layoutY="334.0" mnemonicParsing="false" onAction="#handleNewPerson" text="add" /> 
     </children> 
    </AnchorPane> 

add.fxml

<AnchorPane id="AnchorPane" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="cloud.addcontroller"> 
    <children> 
     <TextField fx:id="firstNameField" layoutX="97.0" layoutY="113.0" /> 
     <TextField fx:id="lastNameField" layoutX="259.0" layoutY="113.0" /> 
     <Button layoutX="451.0" layoutY="113.0" mnemonicParsing="false" onAction="#handleOk" text="save" /> 
    </children> 
</AnchorPane> 

Answer 2

Я не буду говорить о (много) проблем с вашим кодом и держать ответ короткий, обращаясь к вашей исходной задачи.

Вам необходимо добавить данные, введенные пользователем в ObservableList, поддерживающие TableView.

@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); 
}