JAC (Java Asn1 Compiler) is a tool for you if you want to (1)parse your asn1 file (2)create .java classes and (3)encode/decode instances of your classes. Just forget all asn1 byte streams, and take the advantage of OOP! BER, CER and DER are all supported
An Eclipse plugin to aid development of Java servlet code that is used for HTML presentation.
The plug-in can be used in environments where JSP cannot be used (e.g older J2EE environments) to automatically encode/decode the presentation HTML in the code