Keyword Filtering please help !!!!!

Question

Hi all,
I am doing my program which is a web browser with filtering funciton, it's running properly now but it have some problem with the keyword filtering function, it still not work properly. I try out a target webpage but that page still displaying...
I suppose to save a webpage into the 'Website.txt' (I use BufferReader and BufferWritter), and compare it with the content of 'Keyword.txt'. IF the keyword are match more than 5 times then the website will be blocked.
I set the keyword in my Keyword.txt with this word "car" and then try to access this webpage:
http://db.gamefaqs.com/console/ps2/...t_auto_sa_h.txt
which content a lot of word "car" ( I checked already). But at the end the page still displaying...
    String B;
    String K = null;
    String W;
    BufferedReader in = new BufferedReader(new FileReader("Banned.txt"));
    BufferedReader in0 = new BufferedReader(new FileReader("Website.txt"));
    BufferedReader in1 = new BufferedReader(new FileReader("Keyword.txt"));
    boolean found = false;
    boolean found1 = false;
///////// Recognize the URL Address  //////////////   
    while ((B = in.readLine()) != null) {
     if (urlText.equals(B)) {
      found = true;
      break;            
    if (found) {
     JOptionPane.showMessageDialog(null,"Website Blocked !");   
    else {
     chautaripane.go(url);
//////// Recognize the keyword  /////////////////   
    BufferedReader inR = new BufferedReader(new InputStreamReader(url.openStream()));
    BufferedWriter buffWrite=null;
    String str;
    buffWrite=new BufferedWriter(new FileWriter("Website.txt"));
    while ((str = inR.readLine()) != null) {
          buffWrite.write(str);
                buffWrite.flush();
                buffWrite.close();
                inR.close();
   int count = 0;
   int lastindex = 0;
////Try to compare and search the keyword
    while ((K = in1.readLine()) != null) {
        while ((W = in0.readLine()) != null) {
        if(W.indexOf(K,lastindex)!=-1)
            count++;
            lastindex=W.indexOf(K,lastindex);
  /////////// If the Keyword appear more than 5 times //////////
    if (count>=5) {
     JOptionPane.showMessageDialog(null,"Website Blocked !");
      System.out.println("found"+found1);
    else {
     chautaripane.go(url);
     System.out.println("not found"+found1);
  ///////////////// Catch exception ////////////////////// 
   } catch (MalformedURLException urlException) {
    System.out.println("Error in ActionListener for URL... ");
    urlException.printStackTrace();
   catch (FileNotFoundException e) {
   catch (IOException e) {
);The content of my 'Keyword.txt' are
car
gun
I implement this function in my 'dcToolBar' class, I have no idea why it's not working because the code seems very logic already....
Can someone please teach me some solution, I really cry out due to this problem, PLEASE HELP ME !!!

Answer 1

You may want to store that words that you want to block in memory, maybe using a patricia trie or a hashtable. I created a sample blocker application to demostrate a solution to the issue posted. Refer to 'main' on usage.
rashid mayes
www.astrientlabs.com
public class WordChecker
    public static final int MAX_ALLOWED = 5;
    private Map blockedWords = new HashMap();
    public WordChecker()
    public void addBlockedWord(String text)
        HitCounter hitCounter = new HitCounter();
        hitCounter.text = text.toLowerCase();
        blockedWords.put(hitCounter.text,hitCounter);
    public void checkWord(String w) throws TooManyInstancesFoundException
        HitCounter hitCounter = (HitCounter)blockedWords.get(w.toLowerCase());
        if ( hitCounter != null )
            hitCounter.hits++;
            if ( hitCounter.hits > MAX_ALLOWED )
                throw new TooManyInstancesFoundException(hitCounter);
    public void addBlockedWordsFromFile(File f) throws IOException
        BreakIterator bi = BreakIterator.getWordInstance();
        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f)));
        String line;
        int start = 0;
        int end = 0;
        while ( (line = br.readLine() ) != null )
            bi.setText(line);
            start = 0;
            end = 0;
            while ( (end = bi.next()) != BreakIterator.DONE )
                addBlockedWord( line.substring(start,end) );
                start = end;
    public void checkFile(File f) throws IOException, TooManyInstancesFoundException
        BreakIterator bi = BreakIterator.getWordInstance();
        BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f)));
        String line;
        int start = 0;
        int end = 0;
        while ( (line = br.readLine() ) != null )
            bi.setText(line);
            start = 0;
            end = 0;
            while ( (end = bi.next()) != BreakIterator.DONE )
                checkWord( line.substring(start,end) );
                start = end;
    public static void main(String[] args)
        try
            WordChecker blocker = new WordChecker();
            blocker.addBlockedWordsFromFile(new File("g:blocked.txt"));
            blocker.checkFile(new File("g:in2.html"));           
        catch (Exception e)
            e.printStackTrace();
        System.exit(0);
class HitCounter
    protected String text;
    protected int hits;
class TooManyInstancesFoundException extends Exception
    public TooManyInstancesFoundException(HitCounter hitCounter)
        super("Too many instances of '" + hitCounter.text + "' have been found.");
}