There are a lot of Java jobs out there.not in startup-land but government and big fortune 500 firms wrote a lot of Java applications in the 90s and early 2000's that they are still maintaining. Also, because of this they will often write new applications in Java because that's what their in house developers who were hired to maintain old apps already know.
I worked on a java server application about 10 years ago and I get more recruiters contacting me about Java positions from that one item on my resume than I get from anything more recent or currently popular.