We can see that, comparing to the 2014 TIOBE Index, JAVA is back on top of the hill, surpassing the C programming language.
The comparison chart published by TIOBE is based on the most popular search engines, online shopping and media delivery websites data, such as: Google, Bing, Yahoo, Baidu, Amazon or YouTube.
In order to better understand the complexity of the programming languages environment and its dynamics I think that TIOBE's Programming Community Index for a twelve years period would be a good start.
TIOBE is broader in scope, in that it uses Google, Bing, Yahoo, Wikipedia, Amazon, YouTube and Baidu to calculate the ratings.
According to TIOBE's December 2012 results, Objective-C is the language of the year, rising 4.3 percent in popularity during 2012.