Data Structures in Java: Part 12, The Comparator Interface, Part 4 Connecticut

Baldwin shows you how to extract the contents of a collection into an array, and how to use a Comparator object to sort the contents of the array into reverse natural order. He also shows you how to sort the contents of the array into natural order without the use of a Comparator object.

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Java Programming, Lecture Notes #1372 * Preface * Preview * Discussion and Sample Program * Summary * What's Next -----------------------------------

Preface

A miniseries

This is the twelfth lesson in a miniseries on Java data structures and the Java Collections Framework. The first lesson in the miniseries was entitled Data Structures in Java: Part 1, Getting Started. The previous lesson was entitled Data Structures in Java: Part 11, The Comparator Interface, Part 3.

The purpose of this miniseries is to help you learn the essential features of Object-Oriented data structures in Java using the Collections Framework.

A sub-series

This is also the third lesson in a sub-series on the Comparator interface. The primary purpose of the lessons in this sub-series is to teach you about the interactions between the Comparator interface and the Collections Framework.

However, this lesson departs somewhat from that primary purpose and teaches you how to use a Comparator object to sort the contents of an array containing references to objects. Technically speaking, an array is not part of the core Collections Framework. However, it is definitely a first cousin to the Framework...

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