[Java] Mit BufferedReader InputStream lesen

 BufferedWriter out = new BufferedWriter(new PrintWriter(sock.getOutputStream()));
 BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
 
 [...]

 do {
 out.flush();
 Thread.sleep(200);
 while ((tmp = in.readLine()) != null) // hier liegt der Fehler
 System.out.println(tmp); // es entsteht ne endlosschleife
 command = s.next();
 out.write(command); 
 } while (!command.equalsIgnoreCase("quit"));