Manipulating Arrays - Java

I have recently worked on arrays in Java, since I enjoy writing algorithms, I find it a way to fill in my free time away from other headaches. This simple Java code isn't complicated, but I just enjoy playing around with arrays. It is more than just a CRUD (create, read, update and delete). You can grow its size (aka growable arrays), replacing values, deleting indexes, deleting value but keeping indexes, adding values in available indexes, error handling and validation and so on.

There is always place for improvements of course, I will change and add few things to increase the effectiveness of the algorithms.

I'm thinking of taking it a little it bit further, maybe work on linked lists, or generic types arrays. We'll see, but my next project is probably going to be measuring algorithms complexity.

You may view the project right, here!

If you have any notes :D let me know.