Manages the window, and displays a pop up notification when the user completes the puzzle.

Since this is a single screen application, just one container (class) for the logic of the user interface is necessary. Break these things up when bui

Convenience class for storing the location of a given tile in the Sudoku puzzle in a Hashmap.

Q: Why isn't this a class hidden behind an interface? A: It requires no external libraries, nor do I ever plan to switch to using external libraries.

Contract is really just another word for interface, which is another word for a Protocol. All of these words mean: "something (a file in this case) wh

JSON is a simple language which is commonly used for storage and data transfer in Desktop, Web, and Mobile programming. By having one simple language

This enum exists to provide better legibility for the logic required to check if each Square in the sudoku puzzle contains a valid value. See GameLogi

This class is the Root Container (the thing which attends to all of the primary objects which must communicate when the program is running (a running

Remember, a program contains representations of real world objects (i.e. Money, User, Game). These things contain real world information (although the

Note: Algorithm based on "Simple Solving Algorithm" from the link below. I will look at more complex and efficient algorithms in the future, they key

Manages the window, and displays a pop up notification when the user completes the puzzle.