Call java method when a trigger is triggered from oracle8i

Hi
Guys..Can u pls help me out how to call a java method when a trigger or stored procedure is called from oracle 8i.
And also tell me where the java class should be loaded.

regds
Venu M

Don't know if the answer is here
http://www.pitchmark.demon.co.uk/java_n_jdbc.htm
but there are some advanced examples using stored procedures and DB stored java classes.
Sean