if (i >= 0) {   // if positive exponent then
                                                // make integer
                                    NumberFormat format
                                        = getNumberFormatOverride();
                                    if (format != null) {
                                        tickLabel = format.format(tickVal);
                                    }
                                    else {
                                        tickLabel = Long.toString((long)
                                                Math.rint(tickVal));