320feb28WordFrequency

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.StringTokenizer;

public class WordFrequency {
    private Map<String, WordCounter> words;

    public WordFrequency(){
        this(16);
    }

    public WordFrequency(int capacity){
        words = new HashMap((int)(capacity*1.25));
    }

    public void count(String fileName) throws FileNotFoundException{
        File file = new File(fileName);
        Scanner sc = new Scanner(file);
        String line = null;
        String word = null;

        while(sc.hasNextLine()){
            line = sc.nextLine();
            StringTokenizer stk = new StringTokenizer(line, ",;:'\".");

            while(stk.hasMoreElements()){
                word = stk.nextToken();

                if(words.get(word) != null){
                    words.get(word).increment();
                }else{
                    words.put(word, new WordCounter(word));
                }
            }

        }

            sc.close();
    }

    @Override
    public String toString() {
        StringBuilder stb = new StringBuilder(15*words.size());
        for(WordCounter wc : words.values()){
            stb.append(String.format("%-10s %2d \n" , wc.getWord(), wc.getCount()));
        }
        return stb.toString();
    }

    public Collection<WordCounter> getFrequency(){
        return words.values();
    }

}