They're building an Android app for Apple Music, so Java is used at Apple in some capacity at least, and will be for the foreseeable future — unless Apple's using some crazy cross-compiler techniques like Microsoft is trying to (unlikely), or Google comes up with a new language (hopefully likely).
At the same time, do not let any current trends in which languages are being used at which companies affect your choice in which programming language to learn. Beyond a certain level of proficiency with any given paradigm, switching to other languages that follow the same isn't that big a deal.
Objective-C was the most relevant language for any developers at Apple and third-party iOS and OS X developers, but within the space of just 12 months Swift since its initial release has reached a point where several prominent authorities on Objective-C, including folks like Aaron Hillegass of Big Nerd Ranch who actually wrote the definitive books on it, are advocating switching away from it ASAP insofar as they're writing actual eulogies for the language: https://realm.io/news/altconf-aaron-hillegass-eulogy-for-objective-c/
All that said, while Java isn't the most modern of languages, it's not a half-bad starting point to get into object-oriented programming.
