Hide Input in multithread app

[Zeeshan Alam]

I want to hide the given input by user and want to do something based on the input only single character I have tried using reader and it hides characters but when i type really fast or keep a key pressed it shows so how can i change that
here is a gist of my code
https://gist.github.com/zedgamer9128/967e8df1bb940579d29160342bbc9055