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Sorry, I don't know much about how you are trying to make the OS do something.

Please post the full text of the error message.

See post #6

If you want the main() method to be able to reference a class variable, you need to save a reference to the created instance of the class and use that to access its variables. The posted code does...

A non-static variable only exists as part of an instance of a class. When you create a class object, all its non-static variables are created with it. Each class object has its own version of each...