**关闭。**此题需要debugging details。目前不接受答复。

编辑问题以包括desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem。这将帮助其他人回答这个问题。
6小时前关闭
Improve this question
ListView不更新JavaFx
在下面的代码中，名为tourList的ListView不会更新，即使Observable ListtourNameList有更新的数据。当我启动程序时，初始列表显示DB条目，但是当我添加新条目时，没有进行更新。谁能帮帮忙...

public class TourListView implements TourListObserver {
    public TourListViewModel tourListViewModel = new TourListViewModel();
    public TourFormViewModel tourFormViewModel = new TourFormViewModel();
    public FormInputManager formInputManager = new FormInputManager();

    Alert alert = new Alert(Alert.AlertType.ERROR);
    Alert successPrompt = new Alert(Alert.AlertType.INFORMATION);

    //Form Components
    @FXML
    public ScrollPane tourForm;
    @FXML
    public TextField formFrom;
    public ChoiceBox<String> formTransportType = new ChoiceBox<>();
    public TextField formTo;
    @FXML
    public TextField formName;
    @FXML
    public TextField formDescription;
    @FXML
    public Button formSubmitButton;
    @FXML
    public ListView<String> tourList = new ListView<>();
    public TextArea formRouteInformation;

    @Override
    public void onTourListUpdated() {
        Platform.runLater(this::updateTourList);  //thread safe update
    }

    public void updateTourList() {
        //check if I am creating a second List
        System.out.println("UPDATE TOUR LIST: TourListView");
        ObservableList<String> tourNameList = tourListViewModel.getTourNameList();
        System.out.println("tourNameList: " + tourNameList.toString() ); //tourNameList has shows new Data
        this.tourList.setItems(tourNameList); //this doesn't show new data
        //this.tourList.getItems().setAll(tourNameList);
        //this.tourList.refresh();
    }

    @FXML
    public void addTour(ActionEvent event) {
        System.out.println("Button clicked: addTour");
        //validate Input
        FormTour formTour = new FormTour(formName.getText(), formDescription.getText(), formFrom.getText(), formTo.getText(), formTransportType.getValue(), formRouteInformation.getText());
        String validationString = formInputManager.validateForm(formTour);

        if (Objects.equals(validationString, FormMessages.VALID_FORM.getMessage())) {
            //post them to DB
            System.out.print("VALID INPUT");
            System.out.printf(validationString);

            tourFormViewModel.postTour(formTour);
            tourListViewModel.updateList();
            successPrompt.setTitle("Tour has been added");
            successPrompt.setContentText(FormMessages.FORM_ADDED.getMessage());
            successPrompt.setHeaderText("");
            successPrompt.showAndWait();
        } else {
            //show error message
            alert.setTitle("INVALID INPUT");
            alert.setContentText(validationString);
            alert.setHeaderText("");
            alert.showAndWait();
            System.out.printf(validationString);
        }

    }

    public void addTourFormShow(ActionEvent event) {
        //make TourList invisible
        if (tourList.isVisible()) {
            tourList.setVisible(false);
            tourForm.setVisible(true);
        } else {
            tourList.setVisible(true);
            tourForm.setVisible(false);
        }
        System.out.println("Button clicked: startForm");
    }

    @javafx.fxml.FXML
    public void initialize() {
        tourListViewModel.registerObserver(this);
        //init List
        ObservableList<String> tourNameListList = FXCollections.observableArrayList();
        tourNameListList = tourListViewModel.getTourNameList();
        this.tourList.setItems(tourNameListList);

        //init ChoiceBox
        String[] choiceBoxChoices = {"public transit", "car", "bike", "foot"};
        formTransportType.getItems().addAll(choiceBoxChoices);
    }
}

我尽力了

this.tourList.getItems().setAll(tourNameList);
this.tourList.refresh();

但也没有用
根据要求，FXML文件：

<SplitPane dividerPositions="0.10738255033557047"
           orientation="VERTICAL"
           prefHeight="300.0"
           prefWidth="174.0"
           AnchorPane.bottomAnchor="0.0"
           AnchorPane.leftAnchor="0.0"
           AnchorPane.rightAnchor="0.0"
           AnchorPane.topAnchor="0.0"
           fx:controller="at.fhtw.app.view.TourListView"
           xmlns="http://javafx.com/javafx/8.0.171"
           xmlns:fx="http://javafx.com/fxml/1">
    <items>
        <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="49.0" prefWidth="172.0"
                    SplitPane.resizableWithParent="false">
            <children>
                <Label layoutY="5.0" text="Tours"/>
                <Button fx:id="addButton" onAction="#addTourFormShow" layoutX="94.0" layoutY="1.0"
                        mnemonicParsing="false" text="+" AnchorPane.rightAnchor="51.0"
                        AnchorPane.topAnchor="0.0"/>
                <Button layoutX="121.0" layoutY="1.0" mnemonicParsing="false" text="-" AnchorPane.rightAnchor="27.0"
                        AnchorPane.topAnchor="0.0"/>
                <Button layoutX="145.0" layoutY="1.0" mnemonicParsing="false" text="..." AnchorPane.rightAnchor="0.0"
                        AnchorPane.topAnchor="0.0"/>
            </children>
        </AnchorPane>
        <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0" prefWidth="160.0">
            <children>
                <fx:include fx:id="tourForm" source="Tour-Form.fxml" visible="false"/>
                <ListView fx:id="tourList" prefHeight="262.0" prefWidth="172.0" AnchorPane.bottomAnchor="0.0"
                          AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0"/>
            </children>
        </AnchorPane>
    </items>
</SplitPane>