void sendToAll(String msg, String id) {
		Iterator it = clients.keySet().iterator();

		while (it.hasNext()) {
			try { //  Ŭ̾Ʈ ϴ κ!
				DataOutputStream out = (DataOutputStream) clients.get(it.next());
				if (out.equals(clients.get(id)))
					continue; // ޼    ϰ continue
				out.writeUTF(msg);
			} catch (IOException e) {
			}
		} // while
	} // sendToAll