Inputting strings from a file?

import java.io.*;
import java.util.*;
public class Example
{
    public static void main() throws IOException
    {
         //set up input stream
        BufferedReader filein = 
         new BufferedReader(new FileReader("C:\\Program Files\\farrago.txt"));

        //set up output stream
        PrintWriter fileout = 
         new PrintWriter(new FileWriter("C:\\Program Files\\fileout.txt"));

        String nextLine;  //a line read from file 
        StringTokenizer t; //the words within the line
        ArrayList a = new ArrayList(); //store all words here
        String s; //next word
        String letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWX  YZ"; 
        boolean isAWord; //true if string represents a Word
        int countGood=0, countBad=0;
        char d; //a digit
        
        System.out.println("\nGo through text\n"); 

        //start 
        while(true)   //potentially infinite loop
        {
            nextLine = filein.readLine();     //read from input file
            if (nextLine == null) break;   //if no more lines, get out
 
            t = new StringTokenizer(nextLine); //identify words
            while (t.hasMoreTokens()) 
            {
                a.add(t.nextToken()); //add next word to list
            }
        } //finished reading file
        
        
     
        
        
        //go through list
        for (int i=0; i<a.size(); i++)
        {
            s = (String)a.get(i); //get next word
            isAWord = true; //assume it represents a Word
            d = s.charAt(0); //first character
            if (letters.indexOf(d) == -1 && d != ',' && d != '.' && d != ';' && d != ':' && d != '!' && d != '?')
            {
                isAWord = false; //NOT SURE IF THIS LOOP IS CORRECT?
            }
           
            else
            {
                for (int j=1; j<s.length(); j++)
                {
                    d = s.charAt(j); //j+1st character
                    if (letters.indexOf(d) == -1)
                    {
                        isAWord = false; //it is not a Word
                        break; //no need to look further
                    }
                }
            }
            if (isAWord) 
            {
                fileout.println(s);
                countGood++;
            }
            else countBad++;
        } //all words processed
   System.out.println("\nA total of " + a.size() + " tokens appeared\n");
        
        System.out.println("\nFinished.\n");
    }
}