October 2017
Beginner
318 pages
7h 26m
English
Content preview from Java Programming for Beginners
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Analyzing ArrayIndexOutOfBoundsException
Our program has thrown an ArrayIndexOutOfBoundsException. This means that we tried to access memory that our memory array did not have access to. Specifically, we tried to look at what was at the index -1 of the array. Since arrays start at index 0, they don't have anything at index -1. Any piece of our computer's memory could be there, and for security reasons, programs aren't allowed to just go looking through a computer's memory because they want to. So, why did this happen? Why did we ask for index -1 of an array, which is never going to be a valid array index?
Well, our first if statement that implemented the functionality to clear our ArrayList executed just fine. Our program saw our CLEAR command, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.