valueIsAdjusting = false; visibleRowCount = 7;
visibleRowCount = 8;
  private void init(ListModel m)  {    if (m == null)      throw new IllegalArgumentException("Null model not permitted.");    dragEnabled = false;    fixedCellHeight = -1;    fixedCellWidth = -1;    layoutOrientation = VERTICAL;    opaque = true;    valueIsAdjusting = false;    visibleRowCount = 7;    cellRenderer = new DefaultListCellRenderer();    listListener = new ListListener();    model = m;    if (model != null)      model.addListDataListener(listListener);    selectionModel = createSelectionModel();    if (selectionModel != null)      {        selectionModel.addListSelectionListener(listListener);        selectionModel.setSelectionMode                              (ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);      }    setLayout(null);    updateUI();  }