Hi all, I have same problem. I have created my report from my class and JasperReport run, but I have a problem with subreport. Example: My Class is Persona and his field are: private long id; private String nome; private String cognome; private Collection<Figlio> figli = new ArrayList<Figlio>(0); My report print all Persona correctly but i want print all Figlio collection too. How can i do? Sorry for my english. Help me, please Thanks Luca