Google Trends is a google application that shows lot of information about a search term. You can see a graph of search volume, news reference volume besides the top cities that most look for that term and so on. You can see the cities by region as well.
So, I put the "java" word in the text field and I got a surprise, Manaus, the city where I live, is in fifth place between the cities that most search by java word in Brazil:
See the complete result here