While some new languages have prettier syntax and interesting constructs, Java remains a viable platform despite it's warts. I would guess more production code today (even new) is still written in Java or c++ than anything else.
Java gets a lot of flak around here but its really not so bad when you use modern versions (JDK 8) with modern libraries (Apache Commons or Guava). Even Eclipse is surprisingly good now, defying my expectations years ago that it would remain buggy and hard to use forever. I learned Java in the last year and it's now my favorite language besides c#.
A large code base written in a language that does not have tooling to do automatic refactoring cannot be maintained for as long a time. Gets scrapped sooner and rewritten. Especially in dynamic languages. A dynamic language may be much faster to prototype and get your initial code base written. But just try maintaining it for ten years. Twenty. Etc.