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The elementAt() method returns an Object- that just means you can put any Object into it. String is an Object. But you could also put other stuff into it (Integers, other Objects), which is why the...

No. Did you click the link I gave you? It's a very simplified program, only a few lines long, that very specifically demonstrates what you're talking about.

I'm not really sure what you're talking about- could you provide an SSCCE that demonstrates what you mean?