what difference there are between x 509 certificate and X509CertificateHolder java? : So i have a problem, i cant´t understand the difference between x509certificate and X509CertificateHolder java, because there are not who explain, of correct form, everybody do code but, they are not specific, what do in those lines, and the documentation is a little hard to understand, if someone can help me, i'll be very grateful, thanks.