Thanks Jacob.

After a lot of googling around found this link on how to create a library

http%3A//blackberry-tips-bikas.blogspot.com/2010/02/how-to-create-library-jar-file-and-use.html%5DBlackBerry%20Tricks%20and%20Tips%20and% 20Codes%3A%20How%20to%20create%20library%20jar%20f ile%20and%20use%20that%20jar%20in%20another%20proj ect

I was wondering why all the other files are generated when only the .jad and .cod makes sense.

I guess the .alx is used for installation using a Javaloader or Desktop Manager in the BB.