I have two jar files - jar1 and jar2. Both of them are located in C:\\Eclipse projects\\ and I have added the paths to both of them to the Environment Variable CLASSPATH as foll
In eclipse, right click on a project->Propeties->Java Build Path->Add External JARs (Add JARs if the jar is inside the project's folder) and then choose your jar file.
From now you can use the inner classes of the jars you added. Eclipse will import them when you'll start using them.