catch (IllegalStateException e)
else
            public void stateChanged(ChangeEvent arg0)            {                try                {                    startTF.setText(addZeros(Integer.toString(start.getValue(),                        16), 6));                    endTF.setText(addZeros(                        Integer.toString(end.getValue(), 16), 6));                    lenTF.setText(Integer.toString(end.getValue()                        - start.getValue() + 1, 16));                }                catch (IllegalStateException e)                {                    //e.printStackTrace();                }            }