Problems with matcher.find()

Question

Hi,
Here is what I'm trying to do. Read one (or more later) files...one line at a time and compare it with a regular expresion to extract email addresses.
Here is my code:
public final class RegExpressions {
    private static String REGEX;
    private static String INPUT;
    private static BufferedReader br;
    private static Pattern pattern;
    private static Matcher matcher;
    private static boolean found, b;
public static void main(String[] args) throws Exception {
        initResources();
private static void initResources() {
       try {         
                  br = new BufferedReader(new FileReader("titleInfo.txt"));
       catch (FileNotFoundException fnfe) {
            System.out.println("Cannot locate input file! "+fnfe.getMessage());
            System.exit(0);
       try {           
            REGEX = "(((\\w)(.)*)+@)";
            INPUT = null ;
            INPUT = br.readLine();
            pattern = Pattern.compile(REGEX);
            while ((INPUT = br.readLine()) != null)
                 // Reset the matcher to begin its next match starting at
                 // the beginning of the newly-read line.
                 matcher.reset(INPUT);
                 matcher = pattern.matcher(INPUT);
                 // Search for a match. A Boolean true value returns if a
                 // match is found.
                 System.out.println("Current INPUT is: "+INPUT);
                 b = matcher.find();
                 System.out.println ("matcher.find() is: " +b);
                 if (matcher.find())
                      System.out.println (INPUT);
       } catch(IOException ioe){}
       catch(PatternSyntaxException pse) {
           System.out.println("There is a problem with the regular expression!");
           System.out.println("The pattern in question is: "+pse.getPattern());
           System.out.println("The description is: "+pse.getDescription());
           System.out.println("The message is: "+pse.getMessage());
           System.out.println("The index is: "+pse.getIndex());
           System.exit(0);
        System.out.println("Current REGEX is: "+REGEX);
        System.out.println("Current INPUT is: "+INPUT);
    }The file I read in looks like this:
Integration of Scheduling and Replication in Data Grids
Anirban Chakrti Depak R.A. Shuhis Supta
Software Engineering and Technology Laboratory
Something Something Ltd.
My City, Horse Road
Bangalore 560 100, India
Tel: [phone]
Fax: [phone]
{an_chakrti, depak_ra, shuhis_supta }@address.com
Now what happens is that matcher.find() never finishes executing. Meaning my programs gets stuck at that particular line. I tested with Print statements before and after...etc. Can anyone help me with this problem? Thanks

Answer 1

the only problem is that some of the emails do not contain the full names. For example if from the text below I extract the email addresses...
Reckoning Legislative Compliances with Service Oriented Architecture
� A Proposed Approach1
Naveen N. Kulkarni K M Senthil Kumar Dr. Srinivas Padmanabhuni
Software Engineering and Technology Labs, Infosys Technologies Ltd., Bangalore, India.
{naveen_kulkarni,senthil_km,srinivas_p}@infosys.com
....and I'm also able to tokenize them (into naveen and kulkarni for example). How do I use this information to extract the names, which have me mentioned earlier on in the text. The format in which the names are written is not the same. ie it differs from paper to paper. Here is the idea I had....
it seems that the first part of the email address always exists as it in the full name. If I used that in a regular expression...and went through the text file again trying to match that reg exp...that should work shouldn't it?
here is my attempt...doesn't work though....any ideas...or an explanation why my code doesn't work?
    private static void extractNames() {
       try {         
                  br = new BufferedReader(new FileReader("titleInfo.txt"));
       catch (FileNotFoundException fnfe) {
            System.out.println("Cannot locate input file! "+fnfe.getMessage());
            System.exit(0);
       try {           
            for (int i=0; i<emails.length;i++){
                 int index = emails.indexOf("_");
          if (emails[i].indexOf("_") != -1){
               StringBuffer firstName = new StringBuffer(temp.substring(0,index));
               REGEX = "((.)[ ])*"+firstName+"((.)[ ])";
          pattern = Pattern.compile(REGEX); // I get a null pointer exception on this line...?
     while ((INPUT = br.readLine()) != null )
               matcher = pattern.matcher(INPUT);
          System.out.println("Current INPUT is: "+INPUT);
          System.out.println ("Matche found? " +b);
          if (matcher.find()){
               System.out.println (INPUT);
               System.exit(0);
} catch(IOException ioe){}
catch(PatternSyntaxException pse) {
System.out.println("There is a problem with the regular expression!");
System.out.println("The pattern in question is: "+pse.getPattern());
System.out.println("The description is: "+pse.getDescription());
System.out.println("The message is: "+pse.getMessage());
System.out.println("The index is: "+pse.getIndex());
System.exit(0);
System.out.println("Current REGEX is: "+REGEX);
System.out.println("Current INPUT is: "+INPUT);
Thanks!