// Program demonstrating use of a map to count the frequency of words in a file.

import java.io.File;
import java.io.IOException;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class SimpleWordCounter
{

    public static void main(String[] args)
    {
        try
            {
                File f = new File("ciaFactBook2008.txt");
                Scanner sc;
                sc = new Scanner(f);
                // sc.useDelimiter("[^a-zA-Z']+");
                Map<String, Integer> wordCount = new TreeMap<String, Integer>();
                while(sc.hasNext())
                    {
                        String word = sc.next();
                        if(!wordCount.containsKey(word))
                            wordCount.put(word, 1);
                        else
                            wordCount.put(word, wordCount.get(word) + 1);
                    }
                // show results
                for(String word : wordCount.keySet())
                    System.out.println(word + " " + wordCount.get(word));
                System.out.println(wordCount.size());
            }
        catch(IOException e)
            {
                System.out.println("Unable to read from file.");
            }
    }
}