在treeview中，当discdetails对象的“changed”布尔属性设置为“true”时，如何在treeitem显示文本的末尾添加星号（*）？
在textfield中进行任何更改时，“changed”布尔值设置为true
下面是一个简短的代码：

public class TreeBind extends Application {

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

    @Override
    public void start(Stage primaryStage) {

        final TreeItem<DiscDetails> treeItemRoot = new TreeItem<DiscDetails>(new DiscDetails("root"));
        final TreeView<DiscDetails> treeView = new TreeView<DiscDetails>(treeItemRoot);

        final DiscDetails disc = new DiscDetails("Title 1");
        treeItemRoot.getChildren().add(new TreeItem<DiscDetails>(disc));
        treeView.setMaxWidth(150);

        final HBox hBox = new HBox();
        final Label lbTitle = new Label("Title");
        final TextField txtTitle = new TextField();

        txtTitle.textProperty().bindBidirectional(disc.textProperty());
        createCommitBinding(txtTitle).addListener((obs, oldText, newText) -> {
            disc.changedProperty().set(true);
            System.out.printf("Text 1 changed from \"%s\" to \"%s\"%n", oldText, newText);
        });

        hBox.getChildren().addAll(lbTitle, txtTitle);

        final HBox root = new HBox();
        root.getChildren().addAll(treeView, hBox);
        final Scene scene = new Scene(root, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

    private StringBinding createCommitBinding(TextField textField) {
        final StringBinding binding = Bindings.createStringBinding(() -> textField.getText());
        textField.addEventHandler(ActionEvent.ACTION, evt -> binding.invalidate());
        textField.focusedProperty().addListener((obs, wasFocused, isFocused) -> {
            if (!isFocused)
                binding.invalidate();
        });
        return binding;
    }
}

还有discdetails类

public class DiscDetails {
    private final StringProperty title;
    private final StringProperty text;
    private final BooleanProperty changed = new SimpleBooleanProperty(false);

    DiscDetails(String title) {
        this.title = new SimpleStringProperty(title);
        text = new SimpleStringProperty("Some text...");
    }

    public StringProperty titleProperty() {
        return title;
    }

    public StringProperty textProperty() {
        return text;
    }

    public BooleanProperty changedProperty() {
        return changed;
    }

    @Override
    public String toString() {
        return title.getValue();
    }
}