validate PDF document with JAVA

good morning,

I'm a littledesperate,I need to knowhow to validateusingjavapdfapibutnot know how.I followedyour steps, which very generouslyput in thepost whosetitleI refertothe subject of thismessage,and gives me thesame erroras you.Did you getit working? Could you send methe code?I ask youplease
I havetwopdf documents,eachwith adate field.In oneof them in thedate field hasamalformeddateand anotherdate isin correct format.Needto distinguish, using the JAVAAPI,each other, but do not knowhow?anyone can help me? thank you very much