Is there already a String array called args that you don't know about? Try reading from args without declaring it.
To me it seems like Dice.main() is not actually the entry point but rather Dice.main() is getting executed by something else and when you are changing it on your file you aren't changing it on the file that executes it.
My guess is maybe if you are lucky then args is already getting declared by the real main method and you can just use it without declaring it yourself.
Typically String args[] is required in Java so I'm guessing the reason it's not required for you is because it's already being declared earlier by the real main method. Try running it assuming that args[] is already being accepted by the system? Or maybe you need to change the part of code that is executing it (which you might not be able to access)?