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That ampersand thing, I'm not sure exactly what you mean, but you don't mean a reference do you? That's C++, not Java. C is procedure oriented. C++ is object oriented.

However, perhaps C also...

It would also work in the main method too.

It would be better there, but I was assuming that the OP had a reason for not having the variable in the main method.

It means that you're calling a non-static variable in a static method.

For starters, try making the variable test be static.