This Hadoop tutorial on MapReduce Example ( Mapreduce Tutorial Blog Series: https://goo.gl/w0on2G ) will help you understand how to write a MapReduce program in Java. You will also get to see multiple mapreduce examples on Analytics and Testing. Check our complete Hadoop playlist here: https://goo.gl/ExJdZs Below are the topics covered in this tutorial: 1) MapReduce Way 2) Classes and Packages in MapReduce 3) Explanation of a Complete MapReduce Program 4) MapReduce Examples on Analytics 5) MapReduce Example on Testing - MRUnit