Java, Classpath, Classloading => Multiple Versions of the same jar/project

Question

I know this may be a silly question for experienced coders. But I have a library (an http client) that some of the other frameworks/jars used in my project require. But all

Answer 1

Each classload picks exactly one class. Usually the first one found.

OSGi aims to solve the problem of multiple versions of the same jar. Equinox and Apache Felix are the common open-source implementations for OSGi.