Reading From A Config File onCommand

Hello miencrafters, i am developing a plugin for my server(May be public). what i am trying to do is when a player joins my server it adds their name to a custom config file along with a default value which is 100. Then when the player types /$ it sends the player the default value(100). But when a player types /$ nothing happens until the server restarts. after the server restarts after the player has already joined before and the player types /& then it shows them the default value(100).
Thx,
danmw3

 

if you are making a money plugin use sql

 

i was going to do that but i dont know very much sql code at all

*I have tried using sql but failed severely lol

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

What?