Once i have made the server side of the chat application, as i run it, i see this : java netbind Exception : address already being used. I have searched through many answers in stack overflow, some of which suggest to use TCPView to check which users and using the same port and to close the other running applications on the same port. Also a few answers told to use Task manager to close off the rest of the activities working on the same port as mine, but none of it seems to work. If anyone can  help me here, i'll be highly grateful.