Main.java

import java.io.IOException;
import java.util.StringTokenizer;

import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

public class Main {
    	
	public static void main(String[] args) throws Exception {
		
		Configuration conf = new Configuration();
		
		Job job = Job.getInstance(conf, "hw1_wordcount");
		job.setJarByClass(Main.class);
		
		job.setMapperClass(Map.class);
	    job.setReducerClass(Reduce.class);
		
	    job.setOutputKeyClass(Text.class);
	    job.setOutputValueClass(IntWritable.class);
	    //System.out.println(new Path(args[0]));
	    //System.out.println(new Path(args[1]));
	    FileInputFormat.addInputPath(job, new Path(args[1]));
	    FileOutputFormat.setOutputPath(job, new Path(args[2]));
	    
	    System.exit(job.waitForCompletion(true) ? 0 : 1);
	}
}