Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions.

Sort One of the most common needs with collections is sorting. Java has long had a built-in Arrays.sort method, and Collections.sort allows for sorting by natural order or using a custom comparator.

The Java Platform provides the most commonly used data structures in the form of the Collections Framework, and it provides a rich API to operate on them. This article explains the concepts behind ...