The bad news is that input validation is difficult. White listing, or identifying all possible strings accepted as input, is nearly impossible for all but the simplest of applications. Black listing, ...

Most web frameworks I've seen handle form validation using exceptions; if the form fields or the whole form don't meet the requirements, an exception is thrown and dealt with (redirect back to the ...

So I'm just starting to learn Java, I'm fumbling my way through my first program that isn't some version of Hello World. The program is actually working, there are a few other sections, but in this ...