Web Crawler

/*Creacion de una web Crawler
* Autor : "Joker"
*/

import java.applet.Applet;
import java.text.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import java.io.*;
//import java.awt.List.*;


public class WebCrawler extends Applet implements ActionListener, Runnable
{
public static final String SEARCH = "Search";
public static final StringSTOP = "Stop";
public static final String DISALLOW = "Disallow:";
public static final int SEARCH_LIMIT = 50;

Panel panelMain;
java.awt.List listMatches;
Label labelStatus;


//URL que se debe buscar
Vector vectorToSearch;
//URL ya buscado
Vector vectorSearched;
//URL que coinciden con
Vector vectorMatches;

//Thread = tema
Thread searchThread;

TextField textURL;
ChoicechoiceType;

public void init()
{
//Configurar el panel de interfaz de usuario principal
//Configurar el panel de interfaz de usuario principal
panelMain = new Panel ();
panelMain.setLayout (new BorderLayout (5, 5));

//Texto de entrada de componentes
Panel panelEntry = new Panel ();
panelEntry.setLayout (new BorderLayout (5, 5));

Panel panelURL = new Panel();panelURL.setLayout(new FlowLayout(FlowLayout.LEFT, 5, 5));
Label labelURL = new Label("URL de inicio:", Label.RIGHT);
panelURL.add (labelURL);
textURL = new TextField ("", 40);
panelURL.add (textURL);
panelEntry.add("North", panelURL);
Panel panelType = new Panel ();
panelType.setLayout (new FlowLayout (FlowLayout.LEFT, 5, 5));Label labelType = new Label("Tipo de Contenido: ", Label.RIGHT);
panelType.add (labelType);
choiceType = new Choice ();
choiceType.addItem ("text/html");
choiceType.addItem ("audio / basic");
choiceType.addItem ("audio / au");
choiceType.addItem ("audio / aiff");
choiceType.addItem ("audio / wav");choiceType.addItem ("video / mpeg");
choiceType.addItem ("video / x-avi");
panelType.add (choiceType);
panelEntry.add("South", panelType);

panelMain.add("North", panelEntry);

//Lista de URLs resultado
Panel panelListButtons = new Panel();
panelListButtons.setLayout(new BorderLayout(5, 5));


Panel panelList = new Panel();panelList.setLayout(new BorderLayout(5, 5));
Label labelResults = new Label("Resultados de la busqueda");
panelList.add("North", labelResults);
Panel panelListCurrent = new Panel();
panelListCurrent.setLayout(new BorderLayout(5, 5));
listMatches = new java.awt.List(10);
panelListCurrent.add("North", listMatches);labelStatus = new Label("");
panelListCurrent.add("South", labelStatus);
panelList.add("South", panelListCurrent);

panelListButtons.add("North", panelList);

//Botones de control de
Panel panelButtons = new Panel();
Button buttonSearch = new Button(SEARCH);
buttonSearch.addActionListener(this);panelButtons.add(buttonSearch);
Button buttonStop = new Button(STOP);
buttonStop.addActionListener(this);
panelButtons.add(buttonStop);

panelListButtons.add("South", panelButtons);

panelMain.add("South", panelListButtons);

add(panelMain);
setVisible(true);

repaint();

//Inicializar las estructuras de datos de b˙squedavectorToSearch = new Vector ();
vectorSearched = new Vector ();
vectorMatches = new Vector ();

//Establecer por defecto para el acceso URL
URLConnection.setDefaultAllowUserInteraction (false);

}

public void start ()
{

}

public void stop()
{
if (searchThread != null)
{...