What is the Meta Key?

Which key on the Windows keyboard corresponds to the "meta" modifier key?
I assumed the "windows key" on the windows keyboard would register as the meta key, but it is not doing so. I want to have a KeyListener that consumes the windows key when it is pressed, and I thought that testing for isMetaDown() would be able to test if the windows key was pressed or not. It isn't. So does the meta key really correspond to some other key? If so, what can I do to test if the windows key was pressed?

I don't know what the Meta key is. The only thing I can suggest is to write a simple program to test for it and then press every key on your keyboard until you get a "true" result.

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