An array in Java is a type of variable that can store multiple values. It stores these values based on a key that can be used to subsequently look up that information. Arrays can be useful for ...

Programmers frequently need to sort elements from a database into a collection, array, or map. In Java, we can implement whatever sorting algorithm we want with any type.

I tend to use Java Collections far more than I use Java arrays. However, when I do need to work with arrays, it is nice to have the many useful features of the java.util.Arrays class.