static private void resolveUsername(Selector sel  ,SelectionKey key,String nick) throws IOException{
for (SelectionKey k : sel.keys()){
    if(k.isValid() && k.channel() instanceof SocketChannel)
    if(((User)k.attachment()).getNick().equals(nick)){
        SocketChannel sct = (SocketChannel)key.channel();
        sct.write(enc.encode(CharBuffer.wrap("ERROR")));
        return;
    }
}
if( ((User)key.attachment()).state() == State.INSIDE){
    for (SelectionKey k : sel.keys()){
    if(k.isValid() && k.channel() instanceof SocketChannel){
        if(!((User)k.attachment()).getNick().equals(((User)key.attachment()).getNick())){
        SocketChannel sct = (SocketChannel)key.channel();
        sct.write(enc.encode(CharBuffer.wrap("NEWNICK "+((User)key.attachment()).getNick() +" "+ nick)));   }
    }
    }
}
((User)key.attachment()).setNick(nick);
SocketChannel sct = (SocketChannel)key.channel();
sct.write(enc.encode(CharBuffer.wrap("OK")));
}

message = it.getNick() +":"+ message;



    for (SelectionKey k : sel.keys()){
       if(k.isValid() && k.channel() instanceof SocketChannel){
           SocketChannel sct = (SocketChannel)k.channel();
           sct.write(enc.encode(CharBuffer.wrap(message)));

       }
    }

try{

           modifiedSentence = inFromServer.readLine();
           }catch(IOException e){
              System.out.println("ERROR");}
           System.out.println(modifiedSentence);
           if(!modifiedSentence.equals(""))
               chatArea.append(modifiedSentence+'n');
       }


    }

public void newMessage(String message) throws IOException {
    outToServer.writeBytes(message+'n');
}