WordCounter.java

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package textandfiles;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.StringTokenizer;
import java.util.Hashtable;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author grvcoelho
 */
public class WordCounter {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        String texto = "";
        

        File file = new File("/Users/grvcoelho/NetBeansProjects/TextAndFiles/src/file.txt");
        StringBuilder sb = new StringBuilder();
        
        try {
            FileInputStream fileStream = new FileInputStream(file);
            
            while(fileStream.available() > 0) {
                String word = Character.toString((char) fileStream.read());
                
                sb.append(word);
            }
            
            texto = sb.toString();
        } catch (IOException e) {
            System.out.println(e.getMessage());
        }
        
        String delimiters = " ,.?!<>(){}[]0123456790'";
        StringTokenizer st = new StringTokenizer(texto, delimiters);
        
        Hashtable table = new Hashtable();
        
        while(st.hasMoreTokens()) {
            String word = st.nextToken().toLowerCase();
            
            if(table.containsKey(word)) {
                int ocurrencies = (int) table.get(word);
                ocurrencies++;
                
                table.put(word, ocurrencies);
            } else {
                table.put(word, 1);
            }          
        }
        
        System.out.println("Texto: " + texto);
        System.out.println(table.toString());
    }
    
}