We have seen the use of the WordCount example program in Chapter 2, Getting Hadoop Up and Running. Now we will explore our own Java implementation by performing the following steps:
Enter the following code into the
WordCount1.java
file:Import java.io.* ; import org.apache.hadoop.conf.Configuration ; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.IntWritable; import org.apache.hadoop.io.Text; import org.apache.hadoop.mapreduce.Job; import org.apache.hadoop.mapreduce.Mapper; import org.apache.hadoop.mapreduce.Reducer; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; public class WordCount1 { public static class WordCountMapper extends Mapper<Object, Text, Text, IntWritable> { private final static IntWritable one = new IntWritable(1); private Text word = new Text(); public void map(Object key, Text...