TableView: the last line becomes unselectable after row deletion -Is this a bug - tableview

Question

for more information see this link Sometimes TableView cannot select last row after row deletion.
the problem only appears when the TableView must contain exactly 6 lines. if I delete the fourth or fifth line, the last line (necessarily fifth) becomes inaccessible (not selectable). as soon as I make another line suppression, the line that was not unreachable becomes selectable !!.
My Controller has the following code:
public class FXMLIssueController implements Initializable {
#FXML
private TableView<User> userTable;
#FXML
private TableColumn<User, String> nameCol;
#FXML
private TableColumn<User, LocalDate> birthdayCol;
#FXML
private TableColumn<User, String> emailCol;
#FXML
private TextField name;
#FXML
private TextField email;
#FXML
private DatePicker birthday;
private ObservableList<User> data;
private LocalDate birth;
/**
* Initializes the controller class.
*/
#Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
data = FXCollections.observableArrayList();
birthday.setOnAction((ActionEvent evnt) -> {
birth = birthday.getValue();
});
userTable.getSelectionModel().selectedItemProperty().addListener(userListener);
configureColumn();
fill_in();
}
#FXML
private void newUser(ActionEvent event) {
userTable.getSelectionModel().clearSelection();
userTable.getSelectionModel().selectedItemProperty().removeListener(userListener);
name.clear();
birthday.valueProperty().set(null);
email.clear();
userTable.getSelectionModel().selectedItemProperty().addListener(userListener);
}
#FXML
private void addUser(ActionEvent event) {
User u = new User();
u.setName(name.getText());
u.setEmail(email.getText());
u.setBirthday(birthday.getValue());
data.add(u);
}
#FXML
private void deleteUser(ActionEvent event) {
User u = userTable.getSelectionModel().selectedItemProperty().getValue();
if (u != null) {
data.remove(u);
}
}
#FXML
private void populate() {
data.clear();
fill_in();
}
private void configureColumn() {
nameCol.setCellValueFactory(new PropertyValueFactory<User, String>("name"));
emailCol.setCellValueFactory(new PropertyValueFactory<User, String>("email"));
birthdayCol.setCellValueFactory(new PropertyValueFactory<User, LocalDate>("birthday"));
birthdayCol.setCellFactory(p -> {
return new TableCell<User, LocalDate>() {
#Override
protected void updateItem(LocalDate item, boolean empty) {
super.updateItem(item, empty);
if (item == null || empty) {
setText(null);
} else {
final DateTimeFormatter format = DateTimeFormatter.ofPattern("dd/MM/yyyy");
setText(item.format(format));
}
}
};
});
}
private final ChangeListener<User> userListener = (value, oldV, newV) -> {
if (oldV != null) {
name.textProperty().unbindBidirectional(oldV.nameProperty());
email.textProperty().unbindBidirectional(oldV.emailProperty());
birthday.valueProperty().unbindBidirectional(oldV.birthdayProperty());
}
if (newV != null) {
name.textProperty().bindBidirectional(newV.nameProperty());
email.textProperty().bindBidirectional(newV.emailProperty());
birthday.valueProperty().bindBidirectional(newV.birthdayProperty());
}
};
private void fill_in(){
for (int i = 0; i < 6; i++) {
User u = new User();
u.setName("u"+i);
u.setBirthday(LocalDate.now().plusDays(i));
u.setEmail("mail"+i+"#gmail.com");
data.addAll(u);
}
userTable.setItems(data);
userTable.getSelectionModel().select(0);
}
}
My FXML File:
<?import javafx.geometry.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="300.0" prefWidth="381.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="issue.FXMLIssueController">
<bottom>
<TableView fx:id="userTable" prefHeight="141.0" prefWidth="381.0" BorderPane.alignment="CENTER">
<columns>
<TableColumn fx:id="nameCol" prefWidth="75.0" text="Name" />
<TableColumn fx:id="birthdayCol" prefWidth="163.0" text="Birthday" />
<TableColumn fx:id="emailCol" prefWidth="141.0" text="Email" />
</columns>
</TableView>
</bottom>
<top>
<HBox alignment="CENTER_RIGHT" prefHeight="40.0" prefWidth="381.0" spacing="10.0" BorderPane.alignment="CENTER">
<children>
<HBox alignment="CENTER_LEFT" prefHeight="30.0" prefWidth="213.0">
<children>
<Button mnemonicParsing="false" onAction="#populate" text="Populate" />
</children>
</HBox>
<Button mnemonicParsing="false" onAction="#newUser" text="New" />
<Button mnemonicParsing="false" onAction="#addUser" text="Add" />
<Button mnemonicParsing="false" onAction="#deleteUser" text="Delete" />
</children>
<padding>
<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
</padding>
</HBox>
</top>
<center>
<GridPane prefHeight="100.0" prefWidth="600.0" BorderPane.alignment="CENTER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" maxWidth="294.0" minWidth="10.0" prefWidth="91.0" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="477.0" minWidth="10.0" prefWidth="387.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label text="Name:" />
<Label text="Birthday" GridPane.rowIndex="1" />
<Label text="email" GridPane.rowIndex="2" />
<TextField fx:id="name" prefHeight="25.0" prefWidth="375.0" GridPane.columnIndex="1" GridPane.hgrow="ALWAYS" />
<TextField fx:id="email" GridPane.columnIndex="1" GridPane.hgrow="ALWAYS" GridPane.rowIndex="2" />
<DatePicker fx:id="birthday" prefHeight="25.0" prefWidth="346.0" GridPane.columnIndex="1" GridPane.rowIndex="1" />
</children>
<padding>
<Insets bottom="7.0" left="7.0" right="7.0" top="7.0" />
</padding>
</GridPane>
</center>
</BorderPane>
Here is the code of the User Class:
public class User {
private final StringProperty name = new SimpleStringProperty();
private final StringProperty email = new SimpleStringProperty();
private final ObjectProperty<LocalDate> birthday = new SimpleObjectProperty<>();
public StringProperty nameProperty() {
return name;
}
public String getName() {
return name.get();
}
public void setName(String name) {
this.name.set(name);
}
public StringProperty emailProperty() {
return email;
}
public String getEmail() {
return email.get();
}
public void setEmail(String email) {
this.email.set(email);
}
public ObjectProperty<LocalDate> birthdayProperty() {
return birthday;
}
public LocalDate getBirthday() {
return birthday.get();
}
public void setBirthday(LocalDate birthday) {
this.birthday.set(birthday);
}
}
class Main:
public class Test extends Application {
#Override
public void start(Stage stage) throws IOException {
Parent root = FXMLLoader.load(getClass().getResource("/issue/FXMLIssue.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.setResizable(false);
stage.show();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}}
I invite you to test the program as follows:
delete the fourth or fifth line.
try to select the last line using the mouse.
if no problem, click the button populate and try again.
Use the following links to download and test the program:
complete project
executable file