public void User_network() {
			try {
				is = user_socket.getInputStream();
				dis = new DataInputStream(is);
				os = user_socket.getOutputStream();
				dos = new DataOutputStream(os);

				Nickname = dis.readUTF(); //  г ޴ºκ
				append("User ID : " +"[ " +Nickname+" ]"+"\n");
				
				send_Message("=Access Complete!!="); //  ڿ  ˸
				String str="===== Access!! =====";
				broad_cast(str); 

			} catch (Exception e) {
				append("Stream Setting Error\n");
			}

		}