How do I compare these text files (aka spell check)

Question

I'm having the hardest time figuring out how to get this spell check to work. Basically, I need to open the dictionary.txt file and then another file which will be spell checked. Ignoring case sensitivity, punctuation, and word endings (such as ly, ing, s). And then output to the user the words that were not found in the dictionary. Here is what I have so far (and it is very basic.... there is no attempt to compare yet since I don't know how to approach this). I only have it outputting to a JTextArea what is opened minus punctuation and upper case....
import java.util.Scanner;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//  Created Sept 4, 2004
*   @version 1.0
*   This program will store dictionary.txt to a String array and
*   open another text file to be specified by the user of the program.
*   As the scanner proceeds through the document, it will spell check
*   and output any (case insensitive) words not found in the
*   dictionary.txt file.
public class Spell extends JFrame {
    /** Area to place the individual words in the file */
    JTextArea outputDictionary, outputWord;
*  Constructor for the class.  Sets up the swing components.
*  Prompts the user for the files to be processed.  Then invokes
*  the process method to actually do the work.
public Spell() {
     // A JTextArea is used to display each word found in the file.
     outputDictionary=new JTextArea("Dictionary List\n\n");
     add (new JScrollPane(outputDictionary));
     //Set the size to 300 wide by 600 pixels high
     setSize(300,600);
     setVisible(true);
        outputWord=new JTextArea("Opened Document\n\n");
        add (new JScrollPane(outputWord));
        setSize(300,600);
        setVisible(true);
    //Prompts user for the dictionary.txt file
    JFileChooser dictionary = new JFileChooser();
    int returnVal = dictionary.showOpenDialog(this);
     if  (returnVal == JFileChooser.APPROVE_OPTION) {
          storeDictionary(dictionary.getSelectedFile());
    //Prompt user to open file to be checked          
    JFileChooser word = new JFileChooser();
    int returnVal2 = word.showOpenDialog(this);
        if (returnVal2 == JFileChooser.APPROVE_OPTION){
            storeOpenFile(word.getSelectedFile());
public void storeDictionary(File dictionaryFile) {
     String dictionary="";
     Scanner scanner=null;
    try {
        // Delimiters specifiy where to parse tokens in a scanner
       scanner = new Scanner(dictionaryFile).useDelimiter("\\s*[\\p{Punct}*\\s+]\\s*");
    catch (FileNotFoundException fnfe) {
        JOptionPane.showMessageDialog(this,"Could not open the file");
       System.exit(-1);
     while (scanner.hasNext()) {         
          dictionary=scanner.next();
          if (!dictionary.equals(""))
             outputDictionary.append(dictionary.toLowerCase()+"\n");
        System.out.println("Thank you, your dictionary is stored.");
public void storeOpenFile(File openFile){
    String word="";
    Scanner scanner2 = null;
    try {
        // Delimiters specifiy where to parse tokens in a scanner
       scanner2 = new Scanner(openFile).useDelimiter("\\s*[\\p{Punct}*\\s+]\\s*");
    catch (FileNotFoundException fnfe) {
        JOptionPane.showMessageDialog(this,"Could not open the file");
       System.exit(-1);
    //stores the words in the opened text file in a String array
     while (scanner2.hasNext()) {         
          word=scanner2.next();
             if(!word.equals(""))
                    outputWord.append(word.toLowerCase()+"\n");
    System.out.println("Thanks, your file has successfully been opened.");
public static void main(String args[]) {
   Spell spellck = new Spell();
   spellck.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

Answer 1

Yes, he actually recommends us to use java 1.5. I have revised my code to read into a TreeSet from the dictionary.txt, but I keep getting the following error when I compile:
Note: C:\Jwork\spell1.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Finished spell1.
Also, when I execute, nothing happens. It looks like it is going to try to do something, but the "open" dialog box never opens and no errors pop up. It just sits there executing. Any suggestions??
here is the code:
import java.util.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//  Created Sept 4, 2004
*   @version 1.0
*   This program will store dictionary.txt to a String array and
*   open another text file to be specified by the user of the program.
*   As the scanner proceeds through the document, it will spell check
*   and output any (case insensitive) words not found in the
*   dictionary.txt file.
public class spell1 extends JFrame{
    JTextArea output = new JTextArea(500,500);
    Set dict = new TreeSet();
    Set file = new HashSet();
    public spell1(){
    Set dict = new TreeSet();
    Set file = new HashSet();
    //Prompts user for the dictionary.txt file
    JFileChooser dictionary = new JFileChooser();
    JFileChooser wordFiles = new JFileChooser();
    int returnVal = dictionary.showOpenDialog(this);
     if (returnVal == JFileChooser.APPROVE_OPTION) {
     storeDictionary(dictionary.getSelectedFile());
    int returnVal2 = wordFiles.showOpenDialog(this);
        if (returnVal2 == JFileChooser.APPROVE_OPTION){
            storeFile(wordFiles.getSelectedFile());
    public void storeDictionary(File dictionaryFile){
        String dictionary="";
     Scanner scanner=null;
    try {
       // Delimiters specifiy where to parse tokens in a scanner
       scanner = new Scanner(dictionaryFile).useDelimiter("\\s*[\\p{Punct}*\\s+]\\s*");
    catch (FileNotFoundException fnfe) {
        JOptionPane.showMessageDialog(this,"Could not open the file");
       System.exit(-1);
     while (scanner.hasNext()) {
          if (!dictionary.equals(""))
             dict.add(scanner.next());
        System.out.println("Thank you, your dictionary is stored.");
    public void storeFile(File wordFile){
        String word="";
        Scanner scanner2=null;
    try{
        scanner2 = new Scanner(wordFile).useDelimiter("\\s*[\\p{Punct}*\\s+]\\s*");
    catch (FileNotFoundException fnfe){
        JOptionPane.showMessageDialog(this,"Could not open the file");
        System.exit(-1);
        while(scanner2.hasNext()){
            if(!word.equals(""))
                file.add(scanner2.next());
    public static void main(String args[]){
        spell1 spellck = new spell1();
        spellck.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}