Is there any API in Java to access wikipedia data

Question

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.

For the use with Java, try http://code.google.com/p/wiki-java. It is only one class, but a great one!

I had the same question and the closest I came to an out-of-the-box solution is bliki, hosted at http://code.google.com/p/gwtwiki/. I also wrote an article at Integrating Stuff to help you get started with it: http://www.integratingstuff.com/2012/04/06/hook-into-wikipedia-using-java-and-the-mediawiki-api/

You can use Jwiki to get Wikipedia data Example :

Jwiki jwiki = new Jwiki("elon musk");
System.out.println("Title :"+jwiki.getDisplayTitle()); //get title
System.out.println("Text : "+jwiki.getExtractText());  //get summary text
System.out.println("Image : "+jwiki.getImageURL());    //get image URL

MediaWiki is a free and open-source wiki software. Originally developed by Magnus Manske and improved by Lee Daniel Crocker, it runs on many websites, including Wikipedia, Wiktionary and Wikimedia Commons.[5][6]

There is list of Java libraries that can help you to connect wiki by java code . https://www.mediawiki.org/wiki/API:Client_code#Java

but after use some of them because of their limitations , we try to call REST services from mediawiki directly.