Classpath in JAR file

Question

I have packed my stand alone app, which is using JAVA Mail API in one JAR file (myapp.jar).
Since JAVA Mail requires 2 seperate jar files, I created a lib dir within the jar that contains all required jar files.
How do I add the lib directory inside the jar to my classpath ?
Just adding myapp.jar to the classpath is not enough.
I also tried to put Class-Path into my Manifest.mf file inside the jar
which did not help. What dir does the manifest.mf file go inside the jar ? How would my Class-Path value have to look ? Maybe I did something wrong there ? Or is the whole thing just not possible and I have to deliver all other jar files seperate :(((((((

Answer 1

Yes that is exactly how it looks. And if it looks like
that, the
lib dir has to be outside the jar file. The '.' is the
same dir as the jar dir. Was your reply a guess or did
you actually manage to do something like that ?I thought I had this working myself. After many iterations, I was able to run the jar files I was creating. Right after I figured it all out, your querry came up.
But, just last night, I realized something was wrong. I tested this structure on both machines I write code on (one Linux, one Win2k) and it worked on both. Finally, I wanted to test on my 'depolyment' machine, a Win2k laptop I rarely write code with, and nothing workded. I was getting the same classdef not found errors you were.
I finally realized, as you mention, it worked on my other machines because the "lib/some.jar" structure existed on the disk. Thus, the jar files were in the larger one, but those weren't being used. Argh. Of course the laptop doesn't have those jars somewhere else. So nothing worked.
Guess this was a case of the blind leading the blind. Sorry! I've had to resort to putting out both jars and doing some rearranging of internal packages to get everything to work from a jar file. I need to have all this done for a trade show next week (Java on Wall Street, anyone?), so it works 'well-enough' right now. Hopefully I'll get back to this and find the proper solution after the show.