This seems fairly obvious, but I feel like I may be missing something. I downloaded 2 necessary jars to use for my project (org.apache.httpclient and org.apache.http), I added these jars to the classpath by going to projet configure build path and going to 'Add External Jar' This takes care of all compile errors, but at runtime I'm getting a class not found exception on these classes. I am not sure if I am missing something or if these are simply bad jars. I don't have a lot of experience doing this. Could anyone offer some guidance?