Just trying to teach myself Java. How do I define an exception I can throw -- say I am asking someone to enter an age, but I want to test to see if it is impossible (like 100, then throw an exception to catch the invalid entry?

Question

Just trying to teach myself Java.  How do I define an exception I can throw -- say I am asking someone to enter an age, but I want to test to see if it is impossible (like < 0, of > 100, then throw an exception to catch the invalid entry?

anonymous · Answer

You basically just need to extend the Exception class.

anonymous · Answer

Check out http://stackoverflow.com/questions/3776327/how-to-define-custom-exception-class-in-java-the-easiest-way

theeric · Answer

There's a lot here for whichever aspects of exception handling interests you: http://docs.oracle.com/javase/tutorial/essential/exceptions/ The link from @seandisanti should help actually write one! This page doesn't really help much at all: http://docs.oracle.com/javase/tutorial/essential/exceptions/creating.html