JavaFX ListView get selected item list

// Demonstrate a list view. 

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ListView;
import javafx.scene.control.MultipleSelectionModel;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class Main extends Application {
   private Label response;

   public static void main(String[] args) {

      launch(args);//w w w .  java 2s  .c  om
   }

   public void start(Stage myStage) {
      myStage.setTitle("ListView Demo");
      FlowPane rootNode = new FlowPane(10, 10);
      rootNode.setAlignment(Pos.CENTER);
      Scene myScene = new Scene(rootNode, 200, 120);
      myStage.setScene(myScene);
      response = new Label("Select Type");

      ObservableList<String> dataList = FXCollections.observableArrayList("HTML", "CSS", "Java");

      // Create the list view.
      ListView<String> listView = new ListView<String>(dataList);

      // Set the preferred height and width.
      listView.setPrefSize(80, 80);

      // Get the list view selection model.
      MultipleSelectionModel<String> lvSelModel = listView.getSelectionModel();

      lvSelModel.selectedItemProperty().addListener(new ChangeListener<String>() {
         public void changed(ObservableValue<? extends String> changed, String oldVal, String newVal) {

            String selItems = "";
            ObservableList<String> selected = listView.getSelectionModel().getSelectedItems();

             for (int i = 0; i < selected.size(); i++) {
                selItems += "\n      " + selected.get(i); 
             }
               

            response.setText("selected: " + selItems);
         }
      });

      // Add the label and list view to the scene graph.
      rootNode.getChildren().addAll(listView, response);

      // Show the stage and its scene.
      myStage.show();
   }
}