JavaFX: TableView's cellvalue is not enough to display in columns, I want..

Question

javaFX: TableView's cellvalue is not enough to display in columns, it will be clipped end of '...', how to show a tip on such cell?
I need a tip because sometimes i can't drag the colunm's head. So i can't see the whole content of the cell.

Answer 1

Create a custom cell and overwrite the updateItem method. Add a tooltip:
                   Tooltip tip = new Tooltip(getString());
                   Tooltip.install(this, tip);
              Here is an example ( a tooltip for the email column) :
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
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.geometry.Insets;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.Tooltip;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import javafx.util.Callback;
public class TableViewToolTipSample extends Application {
    private TableView<Person> table = new TableView<Person>();
    private final ObservableList<Person> data =
            FXCollections.observableArrayList(
            new Person("Jacob", "Smith", "[email protected]"),
            new Person("Isabella", "Johnson", "[email protected]"),
            new Person("Ethan", "Williams", "[email protected]"),
            new Person("Emma", "Jones", "[email protected]"),
            new Person("Michael", "Brown", "[email protected]"));
    final HBox hb = new HBox();
    public static void main(String[] args) {
        launch(args);
    @Override
    public void start(Stage stage) {
        Scene scene = new Scene(new Group());
        stage.setTitle("Table View Sample");
        stage.setWidth(450);
        stage.setHeight(550);
        final Label label = new Label("Address Book");
        label.setFont(new Font("Arial", 20));
        table.setEditable(true);
        Callback<TableColumn, TableCell> cellFactory =
                new Callback<TableColumn, TableCell>() {
                    public TableCell call(TableColumn p) {
                        return new CustomCell();
        TableColumn firstNameCol = new TableColumn("First Name");
        firstNameCol.setMinWidth(100);
        firstNameCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("firstName"));
       // firstNameCol.setCellFactory(cellFactory);
        TableColumn lastNameCol = new TableColumn("Last Name");
        lastNameCol.setMinWidth(100);
        lastNameCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("lastName"));
      //  lastNameCol.setCellFactory(cellFactory);
        TableColumn emailCol = new TableColumn("Email");
        emailCol.setMinWidth(200);
        emailCol.setCellValueFactory(
                new PropertyValueFactory<Person, String>("email"));
        emailCol.setCellFactory(cellFactory);
        table.setItems(data);
        table.getColumns().addAll(firstNameCol, lastNameCol, emailCol);
        final VBox vbox = new VBox();
        vbox.setSpacing(5);
        vbox.setPadding(new Insets(10, 0, 0, 10));
        vbox.getChildren().addAll(label, table, hb);
        ((Group) scene.getRoot()).getChildren().addAll(vbox);
        stage.setScene(scene);
        stage.show();
    public static class Person {
        private final SimpleStringProperty firstName;
        private final SimpleStringProperty lastName;
        private final SimpleStringProperty email;
        private Person(String fName, String lName, String email) {
            this.firstName = new SimpleStringProperty(fName);
            this.lastName = new SimpleStringProperty(lName);
            this.email = new SimpleStringProperty(email);
        public String getFirstName() {
            return firstName.get();
        public void setFirstName(String fName) {
            firstName.set(fName);
        public String getLastName() {
            return lastName.get();
        public void setLastName(String fName) {
            lastName.set(fName);
        public String getEmail() {
            return email.get();
        public void setEmail(String fName) {
            email.set(fName);
    class CustomCell extends TableCell<Person, String> {
        private TextField textField;
        public CustomCell() {
        @Override
        public void updateItem(String item, boolean empty) {
            super.updateItem(item, empty);
            if (empty) {
                setText(null);
                setGraphic(null);
            } else {
                if (isEditing()) {
                    if (textField != null) {
                        textField.setText(getString());
                    setText(null);
                    setGraphic(textField);
                } else {
                    setText(getString());
                    setGraphic(null);
                    Tooltip tip = new Tooltip(getString());
                    Tooltip.install(this, tip);
        private String getString() {
            return getItem() == null ? "" : getItem().toString();
}If you need a tooltip for a column header:
        TableColumn emailCol = new TableColumn();
        Label emailHeaderLabel = new Label("Email header label");
        emailCol.setGraphic(emailHeaderLabel);    
        Tooltip tip = new Tooltip("Email header label");
        Tooltip.install(emailHeaderLabel, tip);Edited: added a tooltip for a column header