Logged In: NO

- add "xystepchart" in ChartTypes.java
- add "int XYSTEPCHART = 27;" in ChartConstants.java
- add
" case XYSTEPCHART :
check(data, XYDataset.class, XY);
return ChartFactory.createXYStepChart(title, xAxisLabel,
yAxisLabel, (XYDataset) data, PlotOrientation.VERTICAL,
true, true, true);"
in CewolfChartFactory.java

-> rebuild the project -> ready to use