int index = list.locationToIndex(anEvent.getPoint()); list.setSelectedIndex(index); list.repaint();
updateListBoxSelectionForEvent(anEvent, false);
    public void mouseMoved(MouseEvent anEvent)    {      // Highlight list cells over which the mouse is located.       // This changes list model, but has no effect on combo box's data model      int index = list.locationToIndex(anEvent.getPoint());      list.setSelectedIndex(index);      list.repaint();    }