Most IDEs allows you to do this easily for a single interface, but I am looking for classes that implements two interfaces at the same time. Is there anyway to automatically do this (without having to manually open every implementer and check)?
If no IDE supports, does Spring have such feature. (I know I can get a list of beans implementing a specific interface, but I am not sure if I can do it for all classes.)
Possibly org.reflections has what you need – unless I still misunderstand your requirements.