Exceptions so only be used when your application encounters an exceptional circumstance that it can not over come. There is much debut upon the subject of what an exceptional circumstance is.
It would be worth your while to look up Exceptions on the Sun
Java site, it has an excellent explanation.
Now, that being said, are you sure that for your application an exception is the correct way to report what is basicly a validation (range check) mismatch?
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