What's the purpose: api.jar + impl.jar + bundle.jar?

Question

I see many Java packages have api, impl and bundle jars (name-api.jar, name-impl.jar, name-bundle.jar). Could someone explain what those mean? Are all three needed by the ap

Answer 1

Often :

• name-api.jar contains only the interface of the API.
• name-impl.jar provides an implementation of all interfaces in the name-api.jar
• name-bundle.jar bundles everything with all the needed classes to run a Java application.