Using APIs in Bukkit Plugins?

Hi,

So in my plugin, there's something I need to use the Apache Commons API for. The thing is, I can't figure out how to attach it to my plugin so it'll recognize it. How would I go about doing this?

Also, I'm using Eclipse.

 

Add it to your project library.
If you already have an existing project, and want to add the API to it, then download the jar file, and go to your Eclipse, right click your project, and press Properties. Then go to your build path, and in the library, add the jar you downloaded as external jar (Same way as you would add the craftbukkit to your project)

 

http://lmgtfy.com/?q=using+libraries+in+eclipse

 

I've tried that, I still get a ClassNotFoundException.

 

http://wiki.bukkit.org/Using_External_Libraries_with_Plugins

 

Thanks!