Using the Apache Mahout machine learning libraries [closed]
This article is fairly thorough and has good examples:https://www.ibm.com/developerworks/java/library/j-mahout/index.html
I used Mahout to implement a distributed recommender system. Our project was to develop a mobile platform to create collaborative filtering recommendations.We gathered data from the users and then used Mahout + Hadoop to make the recommendations.
The projects is described here
http://ceur-ws.org/Vol-676/paper9.pdf
http://egc2012.labri.fr/abstracts/139.pdf
And some of it in my blog here:http://girlincomputerscience.blogspot.com.br/