I am generating the JRXML file depending on different options, but ones I can find out the solution in iReport I will know how generate my jrxml file. I don't wont to use groups with styles for constructing my table because I have the solution of jrTable object but, from java doc of the jasperReports API , the groups of a table dataSet have not visible space, they are used only for calculate values. P.S. I am from Romania also and I am glad to know that you are too.