Setting Linux environment variable

Is there other web site which talks about how to set the environment variable of J2EE for Linux?

I followed this web site

http://www.dougsparling.com/comp/howto/linux_java.html

but after all

when I tired to compile a servlet program... it couldn't be complied. I think the case is that the compiler couldn't find servlet.jar ...

why is that?

[387 byte] By [CYung] at [2007-9-26 13:46:21]