When I run the code below, it is normal on the visual area. When I scrolling down/up to see more rows,the setDisable() execute abnornally.It seems quite random which row be seted to disable.
Is there any way to solve this problem?

package org.vivus.javafx2.table;

import javafx.application.Application;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.CheckBox;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.CheckBoxTableCell;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;

public class TableExample extends Application {
public static void main(String[] args) {
launch(args);
}

@Override
public void start(Stage primaryStage) throws Exception {
init(primaryStage);
primaryStage.show();
}

@SuppressWarnings("unchecked")
private synchronized void init(Stage primaryStage) {
VBox root = new VBox();
primaryStage.setScene(new Scene(root));

final ObservableList<Person> data = FXCollections.observableArrayList(new Person(true,
"Jacob", "Smith", "jacob.smith@example.com"), new Person(false, "Isabella",
"Johnson", "isabella.johnson@example.com"), new Person(true, "Ethan", "Williams",
"ethan.williams@example.com"), new Person(true, "Emma", "Jones",
"emma.jones@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"), new Person(false, "Michael", "Brown",
"michael.brown@example.com"));
final TableView<Person> tableView = new TableView<Person>();
tableView.setItems(data);
tableView.setEditable(true);
root.getChildren().add(tableView);

// "Invited" column
TableColumn<Person, Boolean> invitedCol = new TableColumn<Person, Boolean>();
CheckBox allCheckBox = new CheckBox();
onActionChangeAll(allCheckBox, tableView);
invitedCol.setGraphic(allCheckBox);
invitedCol.setMinWidth(50);
invitedCol.setCellValueFactory(new PropertyValueFactory<Person, Boolean>("invited"));
invitedCol
.setCellFactory(new Callback<TableColumn<Person, Boolean>, TableCell<Person, Boolean>>() {
public TableCell<Person, Boolean> call(TableColumn<Person, Boolean> p) {
return new CheckBoxTableCell<Person, Boolean>() {
@Override
public void updateItem(Boolean item, boolean empty) {
super.updateItem(item, empty);
if (this.getIndex() % 2 == 0) {
this.setDisable(true);
}
}
};
}
});

// "first Name" column
TableColumn<Person, String> firstNameCol = new TableColumn<Person, String>();
firstNameCol.setResizable(false);
firstNameCol.setEditable(false);
firstNameCol.setText("First");
firstNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));
// "Last Name" column
TableColumn<Person, String> lastNameCol = new TableColumn<Person, String>();
lastNameCol.setText("Last");
lastNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName"));
// "Email" column
TableColumn<Person, String> emailCol = new TableColumn<Person, String>();
emailCol.setText("Email");
emailCol.setMinWidth(200);
emailCol.setCellValueFactory(new PropertyValueFactory<Person, String>("email"));

tableView.getColumns().addAll(invitedCol, firstNameCol, lastNameCol, emailCol);
}

protected void onActionChangeAll(final CheckBox allCheckBox, final TableView<Person> tableView) {
allCheckBox.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
boolean value = allCheckBox.selectedProperty().get();
for (Person person : tableView.getItems()) {
person.setInvited(value);
}
}
});
}

class Person {
private BooleanProperty invited;
private IntegerProperty group;
private StringProperty firstName;
private StringProperty lastName;
private StringProperty email;

public Person(boolean invited, String fName, String lName, String email) {
this.invited = new SimpleBooleanProperty(invited);
this.firstName = new SimpleStringProperty(fName);
this.lastName = new SimpleStringProperty(lName);
this.email = new SimpleStringProperty(email);
this.invited.addListener(new ChangeListener<Boolean>() {
public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
System.out.println(firstNameProperty().get() + " invited: " + t1);
}
});
}

public Person(boolean invited, Integer group, String fName, String lName, String email) {
this.invited = new SimpleBooleanProperty(invited);
this.group = new SimpleIntegerProperty(group);
this.firstName = new SimpleStringProperty(fName);
this.lastName = new SimpleStringProperty(lName);
this.email = new SimpleStringProperty(email);
this.invited.addListener(new ChangeListener<Boolean>() {
public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
System.out.println(firstNameProperty().get() + " invited: " + t1);
}
});
}

public BooleanProperty invitedProperty() {
return invited;
}

public DoubleProperty ageProperty() {
return new SimpleDoubleProperty();
}

public IntegerProperty groupProperty() {
return group;
}

public StringProperty firstNameProperty() {
return firstName;
}

public StringProperty lastNameProperty() {
return lastName;
}

public StringProperty emailProperty() {
return email;
}

public void setInvited(boolean invited) {
this.invited.set(invited);
}

public void setGroup(int group) {
this.group.set(group);
}

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

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

public void setEmail(String email) {
this.email.set(email);
}
}
}