Firstly thanks everyone who helped me. Especially, Roel De Nijs and Roberto Perillo.
After I sent the complain email everyday since 01/05/10, the f***ing Sun/Orcale finally replied me. The told me my exam was passed on 20/March/2010!!!
WTF ! Anyway, the result is what I want.
By the way, it seems you need to login http://www.certmanager.net/sun to activate your account so that they can mail the certificate to you. Because I haven't logined my account for one year, Sun/Oracle said this was the reason I haven't received any news about my SCJD exam.
I have nothing to say about that. At least they can try to email me and let me know the result. They don't need me to send the complain email to they everyday. Oh my God.
Anyway, Thank you everyone! My next target: SCWCD.