Get web Content into array

Question

Hello, I am trying to retrieve the content of a web site into an array so that i can compare it to itself later to see if it has changed. I am trying to make get the content into an array then get the content into a different array later and compare the two arrays to look for the change. I am having some trouble with the reading the content and putting that content into the arrays. Is a buffered reader/imputstream reader the best way to do this? Any help would be greatly appreciated :).

Answer 1

Look into this code, this will store url contents into Hashtable and you can compare them by retrieving them from this Hashtable.
import java.util.*;
import java.io.*;
import java.net.*;
class ContentReader {
     private Hashtable urlContent;
     public ContentReader() {
          urlContent = new Hashtable();
     public void addContent(String url) {
          try {
               URL res = new URL(url);
               URLConnection uc = res.openConnection();
               uc.connect();
               InputStream is = uc.getInputStream();
               DataInputStream bs = new DataInputStream(is);
               String line="";
               ArrayList al = new ArrayList();
               while((line=bs.readLine()) != null) al.add(line.trim());
               urlContent.put(url,al);
               Object[] content = al.toArray();
               for(int i=0;i<content.length;i++) System.out.println(content);
          } catch(Exception e) {
               e.printStackTrace();
     public boolean compareURLs(String url1,String url2) {
          boolean ret=false;
          //You can code your comparison here.
          return ret;
     //This method is for testing the above code
     public static void main(String args[]) {
          ContentReader cr = new ContentReader();
          String url1="some_url1";
          String url2="some_url2";
          cr.addContent(url1);
          cr.addContent(url2);
          cr.compareURLs(url1,url2);
Hope this give you an idea. Don't forget dukes if it helps you.
Sudha