How i can make chat desktop application in java??

I want to make chat desktop application using swing component in java.. i want to use socket program.. But how to use socket in my programming?? Please Help me..

You should break the problem down into its constituent steps and the solve each small step one at a time. I'd start by reading up on and learning about socket programming, and advancing from there. There are great tutorials that can get you going.

As an aside, your question is very general and in fact overly broad and really can't be answered without having one of us re-writing a tutorial that already exists. You will have a better experience here and on other forums if you ask as specific a question as possible, preferably after having studied the tutorials.