how to send login information to server through socket in java -

i'm trying write instant messenger , has client application , server application should run separately on each client computer , server . of course clients communicating each other through socket . , i'm saving each client's information on server . means client's application should send login information server , waite hear result . want know best way send information server ? should send through same socket or ?

socket programming interesting topic in java. can use 2 main methodologies program instant messenger.

i assume know how programme sockets , working it's data streams. provide logic of instant messenger login.

1. server-client method

it requires 2 different progammes such client application , server application. server side user login can performed using method. it's possible transmit data encoded json or xml. received data decodes object. it's possible identify data message or login information server. consider following example.

• create data object transmit

class transmitdata {

    private string username;//user name of sender     private string password;//password of sender     private string touser;//user name of receiver     private string type;//message type message or login information     //message types     public static final string message = "message";     public static final string login_information = "login_information";      public transmitdata() {     }      //add getters , setters here  } 

• then convert xml or json string

  <transmit-data> <user-name></user-name> <password></password> <to-user></to-user> <message-type></message-type> </transmit-data>

• after send xml data via socket connection

• decode message @ server

• identify message type , perform next actions

however server-client instant messengers not usable when server offline. not recommended when use in local area network.

2. peer-to-peer method

peer-to-peer instance messegers has 1 programme containing both server , client coding. it's hard develop , out of logic when using server-side user login. can add client side login messenger easily. it's possible add features search , add other users address book. become smarter when using. advantage not require server. think it's when use instant messenger in local area network.