JavaFX How to Display Multiple Selected Items from ObservableList<String>

[AhFai Chan]

The requirement is to display a list of selected items from an ObservableList, but Label isn't doing the job. Only the last selected item is displayed.
Please review test code, it has undergone multiple variations, but cannot get it to display more than one selected item.

import javafx.application.*;
import javafx.scene.*;
import javafx.stage.*;
import javafx.scene.layout.*;
import javafx.scene.control.*;
import javafx.geometry.*;
import javafx.beans.value.*;
import javafx.collections.*;

public class ListViewMultiple extends Application {

	Label response;
	ListView<String> lvGrape;
	
	public static void main(String[] args) {
		// launch the javafx app
		launch(args);
	}
	public void start(Stage myStage) {
	
		myStage.setTitle("ListView allows multiple selection");

		FlowPane rootNode = new FlowPane(10,10);
		
		rootNode.setAlignment(Pos.CENTER);
		
		Scene myScene = new Scene(rootNode, 202,140);
		
		myStage.setScene(myScene);
		
		response = new Label("You can select more than one grape type.");
		response.setWrapText(true);
		
		// Create an observable list of entries for the list view
		// ... in the real world this list will be from the cloud database
		ObservableList<String> grapeTypes = 
				FXCollections.observableArrayList("Barbera",
						"Blauburgunder",
						"Brunello",
						"Cabernet Sauvinon",
						"carignane",
						"Carmenere",
						"Cinsault",
						"Dolcetto",
						"Durif",
						"Edelvernatch",
						"Gamay",
						"Grenache",
						"Grignolino",
						"Kalterersee Auslese",
						"Lagrein",
						"Malbec",
						"Montepulciano",
						"Mourvodre",
						"Nebbiolo",
						"Petit Sirah",
						"Petit Verdot");
		
	
		// Create a list view to hold the collection
		lvGrape = new ListView<String> (grapeTypes);
		lvGrape.setPrefSize(200, 80);
		
		// get the list view selection model, this time use "multiple"
		MultipleSelectionModel<String> lvSelModel =
				lvGrape.getSelectionModel();
		lvSelModel.setSelectionMode(SelectionMode.MULTIPLE);
		
		// use a change event listener to respond to a change of selections
		lvSelModel.selectedItemProperty().addListener(new ChangeListener<String>() {
			
			public void changed(ObservableValue<? extends String> changed, 
				String oldVal, String newVal) {
				
				String selItems = "";
				ObservableList<String> selected = lvSelModel.getSelectedItems();
				// display the selections
				for(String item : selected)
					selItems += "\n Select grape types : " + item;
				
				// testing 123 : lvSelModel.getSelectedItems() is working
				// System.out.println(selItems);

				response.setText("All the selected grape types: " + selItems);  // <--- displays only the most recent selected item
			}
		});
		// add label and its list view to the scene graph
		rootNode.getChildren().addAll(lvGrape, response);
		
		// show the scene on the stage
		myStage.show();
	}

} // end of ListViewMultiple class

[Knute Snortum]

Hmm, it works for me.  Silly question: are you holding down the Ctrl key while you select?

[AhFai Chan]

Knute Snortum wrote:Hmm, it works for me.  Silly question: are you holding down the Ctrl key while you select?

OK, holding down the control bottom makes it work.
Will have to put that into tool tip for the real thing.
Thanks.