Does Java have global variables?

What is the best way to store variables in Java?

• This might seem like a weird question, but here it goes. I'm making my first Java game right now (or, I have been for awhile). In smaller, simpler programs, keeping track of variables was easy, because it was usually only one or two classes, and a handful of methods. But now, I have almost nine classes already, and I'm running into issues with needing "global variables". For example, I have a variable that tells the "status" of the game, running, paused, or shutting down. This variable needs to be accessible to the Graphics, Logic, and Control threads, so they will shutdown with the program. My initial thought was that I would just get the variables from these methods in various classes. That however, was stupid, because non-running classes/methods re-initialize the variable's value when they are called again, and using static variables is bad code and unpredictable. So, is there some method I'm missing for getting  a variable's value between different classes, or do I need to write out all variables to temp files? My thinking is that writing everything to a temp file, and having all classes read that file, would cause conflicts in read/write as well as slow the program down tremendously. Then again, the first thing I programmed on was a TI-83, and computers are quite a bit faster than that. Help?

• Answer:

  You can store the values in a Game singleton. Like Game.getInstance().setStatus(status) and getStatus, respectively.