Average age of male and female people died in titanic

import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.conf.*;
import org.apache.hadoop.io.*;
import org.apache.hadoop.mapreduce.*;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
           
   public class Average_age {
           
    public static class Map extends Mapper<LongWritable, Text, Text, IntWritable> {
       
       private Text gender = new Text();
       private IntWritable age = new IntWritable();    
       public void map(LongWritable key, Text value, Context context ) throws IOException, InterruptedException {
           String line = value.toString();
           String str[]=line.split(",");
           if(str.length>6){
               gender.set(str[4]);
           if((str[1].equals("0")) ){   
               if(str[5].matches("\\d+")){
                   int i=Integer.parseInt(str[5]);
                   age.set(i);

               }
        }
     }
     context.write(gender, age);

      }       
               
    } 
           
    public static class Reduce extends Reducer<Text,IntWritable, Text, IntWritable> {
   
       public void reduce(Text key, Iterable<IntWritable> values, Context context) 
         throws IOException, InterruptedException {
           int sum = 0;
           int l=0;
           for (IntWritable val : values) {
               l+=1;
               sum += val.get();
           }
           sum=sum/l;
           context.write(key, new IntWritable(sum));
       }
    }
           
    public static void main(String[] args) throws Exception {
       Configuration conf = new Configuration();
           
           @SuppressWarnings("deprecation")
        Job job = new Job(conf, "Averageage_survived");
           job.setJarByClass(Average_age.class);
       
           job.setMapOutputKeyClass(Text.class);
           job.setMapOutputValueClass(IntWritable.class);
        //  job.setNumReduceTasks(0);
       job.setOutputKeyClass(Text.class);
       job.setOutputValueClass(IntWritable.class);
           
       job.setMapperClass(Map.class);
       job.setReducerClass(Reduce.class);
           
       job.setInputFormatClass(TextInputFormat.class);
       job.setOutputFormatClass(TextOutputFormat.class);
           
       FileInputFormat.addInputPath(job, new Path(args[0]));
       FileOutputFormat.setOutputPath(job, new Path(args[1]));
        Path out=new Path(args[1]);
        out.getFileSystem(conf).delete(out);
       job.waitForCompletion(true);
    }
           
  }