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This module shows you how to use the simpler version of the overloaded toArray method that is declared in the Collection interface. The module also explains why you need to exercise care when using the elements stored in the resulting array to avoid corrupting the state of the objects referred to by the elements in the collection.

Revised: Fri Apr 08 11:29:38 CDT 2016

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Table of contents

Preface

This module is one of a series of modules designed to teach you about Object-Oriented Programming (OOP) in general and the Java Collectionsframework in particular.

This module shows you how to use the simpler version of the overloaded toArray method that is declared in the Collection interface. The module also explains why you need to exercise care when using the elements stored in the resulting array to avoid corrupting the state of the objects referred to by the elements in the collection.

In addition to studying these modules, I strongly recommend that you study the Collections Trail in Oracle's Java Tutorials . The modules in this collection are intended to supplement and not to replace those tutorials.

Viewing tip

I recommend that you open another copy of this module in a separate browser window and use the following links to easily find and view the listings while you are reading about them.

Listings

Preview

In earlier modules, I used the toArray method, declared in the Collection interface, to copy elements from a collection into an array. However, in those modules, I didn't take the time to fully explain how to usethe method. Also, I didn't fully explain the precautions that you need to take when you use the method.

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Source:  OpenStax, Object-oriented programming (oop) with java. OpenStax CNX. Jun 29, 2016 Download for free at https://legacy.cnx.org/content/col11441/1.201
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