I don't understand why Java uses the reverse of a (probably hypothetical) domain name as the name of a package, while mostly there is no connection between the domain name that some people uses and the products that they have. A lot of developers don't even have any domain.
What are the reasons of this naming convention, if any?
Best Answer
Global uniqueness. If everyone, or at least serious developers who distribute their code beyond in-house projects, adheres to that convention, it will never happen that you get name clashes when you add another third-party library to your project. Bear in mind that Java was initially propagated as a solution for code deployment anywhere, anytime (via applets and remote classloading over the internet).