My game executes and saves wonderfully on Windows 7, even if the folder I save to doesn't exist. I used the following code (roughly):
new File("Data/Saves").mkdirs();
The problem occurred when I sent it to my friend with Windows 8. He said that the Data folder was nowhere to be found, and it wasn't saving anything. Obviously a huge problem. Is there a compatibility problem or a workaround? Is it even the OS?