Show tooltip on color list

Question

Is it possibile to show a tooltip to display the color name?
http://s10.postimg.org/94rd93scp/Z034.png
Here is my code for ComboBox color rendering
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.ContentDisplay;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
import javafx.util.Callback;
public class ProvaComboRendering extends Application {
    @Override
    public void start(Stage primaryStage) {
        StackPane root = new StackPane();
        ComboBox<String> cb = new ComboBox<String>();
        cb.setPrefSize(150, 20);
        root.getChildren().add(cb);
        Scene scene = new Scene(root, 300, 250);
        primaryStage.setScene(scene);
        primaryStage.show();
    ObservableList<String> data = FXCollections.observableArrayList(
            "chocolate", "salmon", "gold", "coral", "darkorchid",
            "darkgoldenrod", "lightsalmon", "black", "rosybrown", "blue",
            "blueviolet", "brown");
      cb.setItems(data);
      Callback<ListView<String>, ListCell<String>> factory = new Callback<ListView<String>, ListCell<String>>(){
          @Override
          public ListCell<String> call(ListView<String> list){
              return new ColorRectCell();
      cb.setCellFactory(factory);
      cb.setButtonCell(factory.call(null));
      static class ColorRectCell extends ListCell<String>{
          @Override
          public void updateItem(String item, boolean empty){
              super.updateItem(item, empty);
              Rectangle rect = new Rectangle(120,13);
              rect.setStroke(Color.BLACK);
              if(item != null){
                  rect.setFill(Color.web(item));
                  setGraphic(rect);
    public static void main(String[] args) {
        launch(args);
Thanks.

Answer 1

Just add
setTooltip(new Tooltip(item));
in your updateItem(...) method.