Java Programming

I am trying to write a program that will listen for keystrokes without a (visible) GUI. So sort of like a hotkey. There has to be a way to do this in Java. Since I was desperate, I looked into the Component source code to see how it reads input from the keyboard but couldn't find anything.
I've searched for a solution to this program for hours and whenever I find someone asking the same thing, it is never answered. Please help