Job ads at indeed: http://www.indeed.com/jobanalytics/jobtrends?q=Java%2C+C%2B%... (Click Relative to see which are increasing compared to others more easily) Doesn't seem to be losing popularity among employers.
That's because their apps are written in Java and they need people to maintain them. Java isn't going anywhere for a while.
For startups developing in Java is probably not a great idea, because startups need to respond to change fast and get things up and running fast, and languages like Python, Ruby, some kind of LISP are way better at that. You can always re-write your application in Java/Scala if performance/scale becomes an issue (a lot of startups dream about having those kinds of problems :D).