If you are looking for a straight up comparison you could check out either of the the following to determine which is more popular:
The RedMonk Programming Language Rankings here - http://redmonk.com/sogrady/2015/07/01/language-rankings-6-15/
In both you can see that Java is the most popular.
Is the question more along the lines of what is more market accepted?
- Or -
Which of the two languages should I use?