IOException for URL

   When I try the code below with "http://www.google.com/search?
source=ig&hl=en&rlz=&q=something" in the URLs.txt file, I get an
IOException error. The server is returning an HTTP response code
403. However, when I open the same URL in my browser, it works
fine.

    A different but similarly formated URL to another server worked
fine. Maybe this server is expection something additional?

      I am new at this, and I wonder if it is obvious what the
problems is.

Thanks, Alan

// download text content of URL

import java.net.*;
import java.io.*;

public class URLget
{
   public static void main ( String[] args ) throws IOException
   {
      try
      {
       BufferedReader infile = new BufferedReader(new
FileReader("URLs.txt"));

         PrintWriter out = new PrintWriter(new
FileOutputStream("downloaded.html"));
         String aURL, str;

         while ((aURL = infile.readLine()) != null)
         {
            URL url = new URL(aURL);
            System.out.println(aURL);

            BufferedReader in = new BufferedReader(new
InputStreamReader(url.openStream()));

            while ((str = in.readLine()) != null)
            {
               out.println(str);
            }

            in.close();
         }
         infile.close();

         out.close();
      }
      catch (MalformedURLException e) {e.printStackTrace();}
      catch (IOException e) {e.printStackTrace();}
   }
}