problem in generating certificates using JCA

[bhaskarjoshi]

hello
i am doing project on Certification Authority(CA).
i need to generate certificates as a part of it.
i am able to generate public/private keys.
but got stuck as to how to generate digital certificates.
i have read JCA.

so anyone having information about source code for certification authority or ideas
pls suggest.
it's urgent
thanx in advance.