RVIM

public class AddTwoIntegers {
    public static void main(String[] args) {
     
        int first = 10;
        int second = 20;
        int sum = first + second;
        System.out.println("The sum is: " + sum);
    }
}

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import java.util.Scanner;

public class Main {

  public static void main(String[] args) 

  {

    Scanner input = new Scanner (System.in);

    System.out.print("Input the first number: ");

    int num1 = input.nextInt();

    System.out.print("Input the second number: ");

    int num2 = input.nextInt();

    int sum = num1 + num2;

    System.out.println();

    System.out.println("Sum: "+sum);

  }

}

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public class WordCount { 

      static int wordcount(String string) 

        { 

          int count=0; 

     

            char ch[]= new char[string.length()];    

            for(int i=0;i<string.length();i++) 

            { 

                ch[i]= string.charAt(i); 

                if( ((i>0)&&(ch[i]!=' ')&&(ch[i-1]==' ')) || ((ch[0]!=' ')&&(i==0)) ) 

                    count++; 

            } 

            return count; 

        } 

      public static void main(String[] args) { 

          String string ="    Hi How are you I am fine"; 

         System.out.println(wordcount(string) + " words.");  

    } 

}
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Mapreduce Addition

package aa;

import java.io.IOException;

import java.util.StringTokenizer;

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.lib.input.FileInputFormat;

import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;

public class GlobalNumberAddition {

 public static class GlobalNumberAdditionMapper

 extends Mapper < Object, Text, Text, IntWritable > {

  int sum = 0;

  public void map(Object key, Text value, Context context) throws IOException,

  InterruptedException {

   StringTokenizer itr = new StringTokenizer(value.toString());

   while (itr.hasMoreTokens()) {

    String str = itr.nextToken();

    sum = sum + Integer.parseInt(str);

   }

  }

  public void cleanup(Context context) throws IOException,

  InterruptedException {

   context.write(new Text("Addition of numbers is"), new IntWritable(sum));

  }

 }

 public static void main(String[] args) throws Exception {

  Configuration conf = new Configuration();

  Job job = Job.getInstance(conf, "Global Addition of Numbers");

  job.setJarByClass(GlobalNumberAddition.class);

  job.setMapperClass(GlobalNumberAdditionMapper.class);

  job.setNumReduceTasks(0);

  job.setOutputKeyClass(Text.class);

  job.setOutputValueClass(IntWritable.class);

  FileInputFormat.addInputPath(job, new Path(args[0]));

  FileOutputFormat.setOutputPath(job, new Path(args[1]));

  System.exit(job.waitForCompletion(true) ? 0 : 1);

 }

}