_actionList.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
_actionList.setSelectedIndex(0);
_actionList.addListSelectionListener(new ListSelectionListener()
_actionList.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
_actionList.setSelectedIndex(0);
_actionList.addListSelectionListener(new ListSelectionListener()