In this section, we will review how array objects can be created and initialized, and where you can find methods that allow us to perform some operations over arrays—copy, sort, and compare, for example.

Although arrays have their place in some algorithms and legacy code, in practice an ArrayList() can do everything an array can do and does not require setting the size upfront. In fact, an ArrayList is using an array to store its elements at the back. So, the performance of an array and ArrayList is comparable too.

So, we are not going to discuss array management too much beyond the basics of creation and initialization. We will provide a short overview and references on where to find the array utility methods in case you need them.