I need to throw an exception if an empty string is entered.

meaning the user just presses enter rather than entering the string that they were supposed to.

What exception would I be throwing if they just press enter where they are supposed to enter in their input?

InvalidArgument or a custom one that inherits RuntimeException

or go the lazy way and throw NullPointerException

the user isn't going to see it regardless. i imagine you'll catch it and show a nice error message.

This post was edited by carteblanche on Nov 18 2013 10:23pm

right now I have this:



But the requirements for my project says I must use exception handling.

my program works the way it is and makes the user enter in something and not just press enter, i am just confused how to throw this exception if it isn't usually caught by the computer anyways.

I know how to throw NumberFormatExceptions

throw new WhateverMyExceptionIs("possibly some arg");

This post was edited by carteblanche on Nov 18 2013 10:33pm

And make sure your code is in a try block.

Huh? No, a throw doesn't need to be inside a try block. See http://docs.oracle.com/javase/tutorial/essential/exceptions/throwing.html

Good practice.

If you are throwing an explicit exception why would you enclose that in a try block? That doesn't make sense at all, example:

nm

This post was edited by bakalolo on Nov 19 2013 05:49pm

you do something like this



you will catch the exception in watever class that calls function if that makes any sense...

This post was edited by bakalolo on Nov 19 2013 06:01pm