I use TextMate (!) to maintain an Android SDK that's a mix of Java, C and C++ avoiding Android Studio like the plague, to maintain an iOS SDK that's mostly Objective-C, similarly avoiding Xcode's editor, and to maintain the backend written in Python that these SDK's talk to. I've got enough going on in my head w/o having to deal with the complexity of two different IDEs.

Anyway, for me Java-the-language is fine. The tooling, at least as it comes with Android (looking at you gradle and all its Android plugins) is what makes me want to pull my hair out.