It's representing the algorithms such as Pair, Stripes and Hybrid approaches in Map Reduce.
Create the HDFS file system by using below command
Hadoop fs -put file.txt file.txt
View the HDFS file system (Check whether our file exist or not) by using below command
Hadoop fs -ls
Run the project by using created HDFS by using below command
Hadoop jar wordcount.jar WordCount file.txt wordcountoutput
Please read this post for more information and setup: http://ranjithdroid.blogspot.com/2015/09/setup-for-mapreduce-program-with.html