How to fix TableView when scrolling

I'm a newbie in JavaFX and I have no idea how to solve this problem. So, I have a checkbox column in a TableView. For example, I select 3 first boxes and scroll down the table. But when I go to the top of table, checkboxes are not selected. Here is some code:

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import javafx.util.Callback;
import java.util.LinkedList;
import java.util.List;

public class App extends Application
{
List<User> list = new LinkedList<>();
TableColumn<User, Integer> id;
TableColumn<User, String> firstName;
TableColumn<User, Boolean> selected;
TableView<User> tableView;

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

@Override
public void start(Stage stage) throws Exception
{
    stage.setHeight(500);
    stage.setWidth(500);
    stage.setMinHeight(200);
    stage.setMinHeight(100);
    stage.setTitle("Table view");

    tableView = new TableView<>();

    ObservableList<User> list = FXCollections.observableArrayList();
    for(int i = 0; i < 40; i++)
    {
        list.add(new User(i, "first name", "last name"));
    }

    id = new TableColumn("ID");
    id.setCellValueFactory(new PropertyValueFactory<User, Integer>("id"));

    firstName = new TableColumn("First Name");
    firstName.setCellValueFactory(new PropertyValueFactory<User, String>("firstName"));

    TableColumn<User, String> lastName = new TableColumn("Last Name");
    lastName.setCellValueFactory(new PropertyValueFactory<User, String>("lastName"));

    selected = new TableColumn("Select");

    Callback<TableColumn<User, Boolean>, TableCell<User, Boolean>> booleanCellFactory =     new Callback<TableColumn<User, Boolean>, TableCell<User, Boolean>>()
    {
        @Override
        public TableCell<User, Boolean> call(TableColumn<User, Boolean> p)
        {
            return new CheckBoxCell();
        }
    };
    selected.setCellValueFactory(new PropertyValueFactory<User, Boolean>("active"));
    selected.setCellFactory(booleanCellFactory);

    tableView.getColumns().addAll(id, firstName, lastName, selected);
    tableView.setItems(list);

    BorderPane pane = new BorderPane();
    pane.setCenter(tableView);

    Scene scene = new Scene(pane);
    stage.setScene(scene);
    stage.show();
}

class CheckBoxCell extends TableCell<User, Boolean>
{
    private CheckBox checkbox;

    @Override
    protected void updateItem(Boolean item, boolean empty)
    {
        super.updateItem(item, empty);
        checkbox = new CheckBox();
        checkbox.setAlignment(Pos.CENTER);
        setAlignment(Pos.CENTER);
        setGraphic(checkbox);
        checkbox.setOnAction(new EventHandler<ActionEvent>()
        {
            @Override
            public void handle(ActionEvent actionEvent)
            {

                if(!checkbox.isSelected())
                {
                    list.remove(tableView.getItems().get(getTableRow().getIndex()));
                } else
                {
                    list.add(tableView.getItems().get(getTableRow().getIndex()));
                }
                System.out.println(list);
            }
        });
    }
}
}    

And the data class "User":

public class User
{
private int id;
private String firstName;
private String lastName;

User(int id, String firstName, String lastName)
{
    this.id = id;
    this.firstName = firstName;
    this.lastName = lastName;
}

public int getId()
{
    return id;
}

public void setId(int id)
{
    this.id = id;
}

public String getFirstName()
{
    return firstName;
}

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

public String getLastName()
{
    return lastName;
}

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

}