chart4series1.setLabel("Rising line");
chart4series1.getMarkerOptions().setStyle(PlotMarkerStyle.square);
chart4O.addNewSeries().setLabel("Declining line");
PlotAxes chart4axes = chart4O.getAxes();
chart4axes.getXaxis().setTicks(
Arrays.asList(new PlotTick(0, "zero"), new PlotTick(1, "one"), new PlotTick(2, "two"),
new PlotTick(3, "three"), new PlotTick(4, "four"), new PlotTick(5, "five")));
chart4axes.getYaxis().setTicks(-5, 0, 5, 10, 15, 20, 25, 30).getTickOptions()
.setFormatString("%d");
add(chart4);
}