How to see the SID in DBA studio?

05-09-02 kzfid
I have encounter the following error when using jsp to connect oracle8i:

javax.servlet.ServletException: IO 常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=135296000)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))

I think that it may be due to the wrong SID in my connection string. Hence, I want to ask how to see the SID in DBA studio.

Any help will be appreciated!!!