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Again, I'm still confused. What does the toString() method of Graphics have to do with calling its drawString() method?

(and FYI if you wish to draw to a component you should do so using the...

I'm a bit confused, I'm not sure what the value toString() returns has to do with your code using drawString().

That is what the toString() method returns for the Graphics object returned by that method, and it describes the properties of the object.