HTTP request(LoadURL) program problem(file connectable but not readable)

Question

I have the following code:
import java.nio.*;
import java.nio.channels.*;
import java.nio.charset.*;
import java.io.*;
import java.net.*;
import java.util.*;
public class LoadURL {
     public LoadURL(String urlRequest) {
          SocketChannel sock=null;
          try {
               URL url=new URL(urlRequest);
               String host=url.getHost();
               String page=url.getPath();
               InetSocketAddress address=new InetSocketAddress(host,80);
               Charset iso=Charset.forName("UTF-8");
               CharsetDecoder decoder=iso.newDecoder();
               CharsetEncoder encoder=iso.newEncoder();
               ByteBuffer byteData=ByteBuffer.allocate(16384);
               CharBuffer charData=CharBuffer.allocate(16384);
               sock=SocketChannel.open();
               sock.configureBlocking(false);
               sock.connect(address);
               Selector listen=Selector.open();
               sock.register(listen, SelectionKey.OP_CONNECT + SelectionKey.OP_READ );
               while (listen.select()>0){
                    Set keys=listen.selectedKeys();
                    Iterator i=keys.iterator();
                    while (i.hasNext()){
                         SelectionKey key=(SelectionKey) i.next();
                         i.remove();
                         SocketChannel keySock=(SocketChannel)key.channel();
                         if (key.isConnectable()){
                              System.out.println("Connectable");
                              if (keySock.isConnectionPending()){
                                   keySock.finishConnect();
                              CharBuffer httpReq=CharBuffer.wrap("GET" + page + "\n\r\n\r");
                              ByteBuffer request=encoder.encode(httpReq);
                              keySock.write(request);
                         else if (key.isReadable()){
                              System.out.println("Readable");
                              keySock.read(byteData);
                              byteData.flip();
                              charData=decoder.decode(byteData);
                              charData.position(0);
                              System.out.print(charData);
                              byteData.clear();
                              charData.clear();
          sock.close();
          } catch (MalformedURLException mue){
               System.out.println(mue.getMessage());
          }catch (UnknownHostException uhe) {
               System.out.println(uhe.getMessage());
          }catch (IOException ioe){
               System.out.println(ioe.getMessage());
     public static void main(String arguments[]) {
          LoadURL app=new LoadURL(arguments[0]);
It compiles without any problems but when I run it (example: > java LoadURL http://www.java.sun.com) it does nothing. I think the problem is that the key.isReadable() (line 51 of the code) ,at the else if check, returns false when it should return true and so it doesn't enters the loop. I'd appreciate any help here.Thank you.

Answer 1

Why are you reinventing the wheel? Use the URLConnection class.