HTML mit Java anzeigen

Hi,

mit dem nachstehenden Java Programm möchte ich den HTML Quellcode einer Webseite
anzeigen lassen, aber es geht schief. Warum?

Danke

public class Webseite
{
public static void main(String[] args)
{
Socket WebseiteSocket = null;
DataInputStream is = null;
String hostname = "www.web.de";

try {WebseiteSocket = new Socket(hostname, 8080);}
catch (UnknownHostException e)
{
System.err.println("Don't know about host: " + hostname);
}
catch (IOException e)
{
System.err.println("Couldn't get I/O for the connection to: " + hostname);
}

try{is = new DataInputStream(WebseiteSocket.getInputStream());}
catch (IOException e)
{
System.err.println("DataInputStream error");
}
catch (NullPointerException e)
{
System.err.println("DataInputStream error");
}

if (WebseiteSocket != null && is != null)
{
try
{
System.out.println( "Webseite: " + is.readLine() );
}
catch (UnknownHostException e)
{
System.err.println("Trying to connect to unknown host: " + e);
}
catch (IOException e)
{
System.err.println("IOException: " + e);
}
}

try
{
is.close();
WebseiteSocket.close();
}
catch (IOException e)
{
System.err.println("IOException: " + e);
}
catch (NullPointerException e)
{
System.err.println("NullPointerException:" + e);
}
}
}
[java]

rocksteady

Hallo,
aus dem "Handbuch der Javaprogrammierung":

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

public class Listing4504
{
  public static void main(String[] args)
  {
    if (args.length != 2) {
      System.err.println(
        "Usage: java Listing4504 <host> <file>"
      );
      System.exit(1);
    }
    try {
      Socket sock = new Socket(args[0], 80);
      OutputStream out = sock.getOutputStream();
      InputStream in = sock.getInputStream();
      //GET-Kommando senden
      String s = "GET " + args[1] + " HTTP/1.0" + "\r\n\r\n";
      out.write(s.getBytes());
      //Ausgabe lesen und anzeigen
      int len;
      byte[] b = new byte[100];
      while ((len = in.read(b)) != -1) {
        System.out.write(b, 0, len);
      }
      //Programm beenden
      in.close();
      out.close();
      sock.close();
    } catch (IOException e) {
      System.err.println(e.toString());
      System.exit(1);
    }
  }
}

MfG

rocksteady

Alternative:

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

public class DisplayWebsite
{
  public static void main(String[] args)
  {
    if (args.length != 1) {
      System.err.println(
        "Usage: java DisplayWebsite <url>"
      );
      System.exit(1);
    }
    try {
      URL url = new URL(args[0]);
      InputStream in = url.openStream();
      int len;
      byte[] b = new byte[100];
      while ((len = in.read(b)) != -1) {
        System.out.write(b, 0, len);
      }
      in.close();
    } catch (MalformedURLException e) {
      System.err.println(e.toString());
      System.exit(1);
    } catch (IOException e) {
      System.err.println(e.toString());
      System.exit(1);
    }
  }
}

Aufruf z.B.: java DisplayWebsite http://www.web.de

MfG