Yes - if you like money and job security - there is very strong demand for java developers and a lot of code to be maintained. Java is entrenched in the corporate world.
If you want to learn something from learning Java - not so much.
If you want to learn something from learning Java - not so much.
Is it a sexy language, no, is it a hip language, no, is it a mature language with some of, if not, the largest support libraries out there, yes, and this is why it is so popular.
Python-related jobs make up 3.36% of permanent IT jobs in the UK. (http://www.itjobswatch.co.uk/jobs/uk/python.do)
Ruby-related jobs make up 3.54% of permanent IT jobs in the UK. (http://www.itjobswatch.co.uk/jobs/uk/ruby.do)
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Java-related jobs make up 14.38% of permanent IT jobs in the UK. (http://www.itjobswatch.co.uk/jobs/uk/java.do)
C#-related jobs make up 16.97% of permanent IT jobs in the UK. (http://www.itjobswatch.co.uk/jobs/uk/csharp.do)
You can't judge the popularity of a language from the stories you're used to seeing on social news websites -- enterprise software, although it may be mundane, employs a huge portion of the developers out there today, and many of them are C# or Java developers.
Reality is well outside what the marketing would have you believe.
Also the reason people pick c#/java etc is simply due to it being a pretty good stable standard for fungible staff with decent productivity output and the ability to scale up really complex functionality pretty fast.