Is there any API in Java to access wikipedia data

Question

I want to know: is there any API or a query interface through which I can access Wikipedia data?

Answer 1

Mediawiki, the wiki platform that wikipedia uses does have an HTTP based API. See MediaWiki API.

For example, to get pages with the title stackoverflow, you call

http://en.wikipedia.org/w/api.php?action=query&titles=Stackoverflow

There are some (incomplete) Java wrappers around the API - see the Client Code - Java section of the API page for more detail.