Socket Problem?

I've got a problem with a few classes at the moment that read from a text file containing a list of urls(XML files off the same server) I am attempting to stream the url that is read from the file and write it locally to a new file on disk.

testXML.java

Code :

package tabxmlbuilder;
 
import java.io.*;
import java.net.URL;
 
public class testXML {
 
    public testXML(String s) throws Exception {
        String urlin = s;
        System.out.println(s); // getTabXml passes every second line read from the text file to s for some reason
        URL url = new URL(urlin);
        File file = new File("temp.txt");
        FileWriter fw = new FileWriter(file);
        BufferedReader bs = new BufferedReader(new InputStreamReader(url.openStream()));
        BufferedWriter bw = new BufferedWriter(fw);
        while (bs.read() != -1) {
            System.out.println(bs.readLine()); // When i remove this line the null pointer exception disappears but it appears to still print out the data I actually want written to disk
            bw.write(bs.readLine());
            bw.flush();
        }
    }
}

GetTabXml.java

Code :

package tabxmlbuilder;
 
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
 
public class GetTabXml {
 
    public GetTabXml() throws IOException {
 
        FileReader fr = new FileReader("dates.txt");
        BufferedReader br = new BufferedReader(fr);
        while (br.readLine() != null) {
            try {
                new testXML(br.readLine());
            } catch (Exception ex) {
                Logger.getLogger(GetTabXml.class.getName()).log(Level.SEVERE, null, ex);
            }    
        }
    }
}

Errors

Below disappears when I remove the printline in filewriter loop.

Code :

Jun 10, 2012 4:56:48 PM tabxmlbuilder.GetTabXml <init>
SEVERE: null
java.lang.NullPointerException
	at java.io.Writer.write(Writer.java:157)
	at tabxmlbuilder.testXML.<init>(testXML.java:18)
	at tabxmlbuilder.GetTabXml.<init>(GetTabXml.java:17)
	at tabxmlbuilder.BuildTabXmlDB.main(BuildTabXmlDB.java:130)

This eventually happens

Code :

Jun 10, 2012 5:16:11 PM tabxmlbuilder.GetTabXml <init>
SEVERE: null
java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(SocketInputStream.java:189)
	at java.net.SocketInputStream.read(SocketInputStream.java:121)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:273)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
	at sun.net.www.MeteredStream.read(MeteredStream.java:134)
	at java.io.FilterInputStream.read(FilterInputStream.java:133)
	at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:2968)
	at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283)
	at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325)
	at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177)
	at java.io.InputStreamReader.read(InputStreamReader.java:184)
	at java.io.BufferedReader.fill(BufferedReader.java:154)
	at java.io.BufferedReader.readLine(BufferedReader.java:317)
	at java.io.BufferedReader.readLine(BufferedReader.java:382)
	at tabxmlbuilder.testXML.<init>(testXML.java:18)
	at tabxmlbuilder.GetTabXml.<init>(GetTabXml.java:17)
	at tabxmlbuilder.BuildTabXmlDB.main(BuildTabXmlDB.java:130)

The main problem that I can pass one url to GetTabXml and it works fine(writes the buffer to temp.txt) until I put it in a loop. Not sure what I am missing. Do I have to wait till the inputstream finishes the first request? I am new to java also. Thanks for your help.