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Yes. Very important concept in programming.

Yes. You can have arrays of any data type.

My idea takes two loops and an array.

Yes that looks exactly like counting. Except instead of using the 10 digits: 0-9 you are using n Strings.

Arrays or some classes from the Collections framework.


Is that like counting, say with 6 digits.
To generate all possible combinations of the digits from 000000 to 999999 is like counting by...

I think enums are compile time constants. I don't know that you can change them at execution time.

Have you read the tutorial? Go to this site and Find enum:
The Really Big Index

Is a Map what...