The default selection model of JavaFX ListView seems to report wrong values to the listener in the Change object, if the selection mode is SelectionMode.MULTIPLE. (If my interpretation of Change is correct.)

I have a list view with items "Julia", "Ian", "Sue", etc. The code below generates the following output:

Clicking first item "Julia" ("Julia" is selected, output correct):

from 0, to 1, removed 0, added 1
was added
removed:
added:
    Julia
selected:
    Julia

Shift + ArrowDown ("Julia" and "Ian" are selected):

from 0, to 1, removed 0, added 1 <-- should be from 1, to 2
was added
removed:
added:
    Julia <-- should be Ian
selected:
    Julia
    Ian

Shift + ArrowDown ("Julia", "Ian", and "Sue" are selected):

from 0, to 1, removed 0, added 1 <-- should be from 2, to 3
was added
removed:
added:
    Julia <-- should be Sue
selected:
    Julia
    Ian
    Sue



import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.ListView;
import javafx.scene.control.MultipleSelectionModel;
import javafx.scene.control.SelectionMode;
import javafx.stage.Stage;

public class rt36941 extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    public void start(Stage stage) {
        ObservableList<String> items = FXCollections.observableArrayList(
                "Julia", "Ian", "Sue", "Matthew", "Hannah", "Stephan", "Denise");
        ListView<String> listView = new ListView<>(items);

        MultipleSelectionModel<String> selectionModel = listView.getSelectionModel();
        selectionModel.setSelectionMode(SelectionMode.MULTIPLE);
        ObservableList<String> selectedItems = selectionModel.getSelectedItems();

        selectedItems.addListener((ListChangeListener.Change<? extends String> c) -> {
            while (c.next()) {
                System.out.printf("from %d, to %d, removed %d, added %d\n",
                        c.getFrom(), c.getTo(), c.getRemovedSize(), c.getAddedSize());
                if (c.wasAdded()) System.out.println("was added");
                if (c.wasRemoved()) System.out.println("was removed");
                if (c.wasPermutated()) System.out.println("was permutated");
                if (c.wasUpdated()) System.out.println("was updated");
                if (c.wasReplaced()) System.out.println("was replaced");
                System.out.println("removed:");
                for (String e : c.getRemoved()) {
                    System.out.println(" " + e);
                }
                System.out.println("added:");
                for (String e : c.getAddedSubList()) {
                    System.out.println(" " + e);
                }
                System.out.println("selected:");
                for (String e : selectedItems) {
                    System.out.println(" " + e);
                }
                System.out.println();
            }
        });

        Scene scene = new Scene(listView);

        stage.setScene(scene);
        stage.show();
    }
}