This project, chatting program is using Selector in NIO package.
--- Run ---
You can find jar files at 'out/artifacts'.
Start server first and then start client(s)
*It just print in console.(No UI)
--- Features ---
Client : Enter{username/chatroom} - 홍길동/채팅방1
Server : Duplicate username check
Client : Chat - 안녕
Server : Send Chat
Client : Whisper{/귓 username MSG} - /귓 홍길동 안녕