Question

我有一个javafx TableView，

public class CellEditingExample extends Application {
        private final TableView table = new TableView();
    private final ObservableList<Person> data =
            FXCollections.observableArrayList( new Person("A"));

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

    @Override
    public void start(Stage stage) {
        Scene scene = new Scene(new Group());
        TableColumn firstNameCol = createSimpleFirstNameColumn();
        table.setItems(data);
        table.getColumns().addAll(firstNameCol);
        table.setEditable(true);

        ((Group) scene.getRoot()).getChildren().addAll(table);
        stage.setScene(scene);
        stage.show();
    }

    private TableColumn createSimpleFirstNameColumn() {
        TableColumn firstNameCol = new TableColumn("First Name");
        firstNameCol.setMinWidth(100);
        firstNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));
        firstNameCol.setCellFactory(TextFieldTableCell.forTableColumn());
        firstNameCol.setOnEditCommit(new EventHandler<TableColumn.CellEditEvent<Person, String>>() {
            @Override
            public void handle(TableColumn.CellEditEvent<Person, String> t) {
                t.getRowValue().setFirstName(t.getNewValue());
                                System.out.println("Table Size is : " + table.getItems().size());
            }
        });
        return firstNameCol;
    }
}

和Person.java是，

public class Person {

    private final SimpleStringProperty firstName;

    public Person(String firstName) {
        this.firstName = new SimpleStringProperty(firstName);
    }

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

    public SimpleStringProperty firstNameProperty() {
        return firstName;
    }
}

如果我们运行该应用程序，我们得到一个表格，其中一行有＆＃34; A＆＃34;作为值，该行可编辑。

我想编辑下一行，即使没有值（也不影响表的项目大小），

我试过了，

FXCollections.observableArrayList( new Person("A"),new Person("")); // This increases getItems().Size();
FXCollections.observableArrayList( new Person("A"),null); // NullPointerException is thrown

有可能吗？

JavaFX TableView编辑一个空行

0 个答案: