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 public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();

    Job job = new Job(conf, "macID");
    job.setJarByClass(MacFilter.class);
    //job.setOutputKeyClass(Text.class);
    //job.setOutputValueClass(IntWritable.class);

    job.setMapperClass(Map.class);
    job.setReducerClass(Reduce.class);

    job.setInputFormatClass(KeyValueInputFormat.class);
    job.setOutputFormatClass(TextOutputFormat.class);