Cadenhead R. - Sams Teach Yourself Java in 21 Days (Covering Java 8)

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Rogers Cadenhead

800 East 96th Street, Indianapolis, Indiana 46240

Sams Teach Yourself Java in 21 Days

Copyright 2016 by Pearson Education, Inc.

All rights reserved. No part of this book shall be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission from the publisher. No patent liability is assumed with respect to the use of the information contained herein. Although every precaution has been taken in the preparation of this book, the publisher and author assume no responsibility for errors or omissions. Nor is any liability assumed for damages resulting from the use of the information contained herein.

ISBN-13: 978-0-672-33710-9
ISBN-10: 0-672-33710-X

Library of Congress Control Number: 2015916217

Printed in the United States of America

First Printing December 2015

Editor-in-Chief
Mark Taub

Executive Editor
Mark Taber

Managing Editor
Kristy Hart

Project Editor
Elaine Wiley

Copy Editor
Barbara Hacha

Senior Indexer
Cheryl Lenser

Proofreader
Chuck Hutchinson

Technical Editor
Boris Minkin

Editorial Assistant
Vanessa Evans

Cover Designer
Mark Shirar

Senior Compositor
Gloria Schurick

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Rogers Cadenhead is a programmer and author. He has written more than 30 books on programming and web publishing, including Sams Teach Yourself Java in 24 Hours and Absolute Beginners Guide to Minecraft Mods Programming. He also publishes the Drudge Retort and other websites that receive more than 20 million visits a year. He maintains this books official website at www.java21days.com and a personal weblog at http://workbench.cadenhead.org.

To my son Max Cadenhead, who just began his freshman year at art school.
Your talent and dedication to your craft at such an early age makes me proud.

Dad

A book of this scope (and heft!) requires the hard work and dedication of numerous people. Most of them are at Sams Publishing in Indianapolis, and to them I owe considerable thanksin particular, to Boris Minkin, Barbara Hacha, Elaine Wiley, and Mark Taber. Most of all, thanks to my wife, Mary, and my sons, Max, Eli, and Sam.

Id also like to thank readers who have sent helpful comments about corrections, typos, and suggested improvements regarding this book and its prior editions. The list includes the following people: Dave Barton, Patrick Benson, Ian Burton, Lawrence Chang, Jim DeVries, Ryan Esposto, Kim Farr, Sam Fitzpatrick, Bruce Franz, Owen Gailar, Rich Getz, Bob Griesemer, Jenny Guriel, Brenda Henry-Sewell, Ben Hensley, Jon Hereng, Drew Huber, John R. Jackson, Bleu Jaegel, Natalie Kehr, Mark Lehner, Stephen Loscialpo, Brad Kaenel, Chris McGuire, Paul Niedenzu, E.J. OBrien, Chip Pursell, Pranay Rajgarhia, Peter Riedlberger, Darrell Roberts, Luke Shulenburger, Mike Tomsic, John Walker, Joseph Walsh, Mark Weiss, P.C. Whidden, Chen Yan, Kyu Hwang Yeon, and J-F. Zurcher.

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Some revolutions catch the world by surprise. Twitter, the Linux operating system, and Pawn Stars all rose to prominence unexpectedly.

The remarkable success of the Java programming language, on the other hand, caught nobody by surprise. Java has been a source of great expectations since its introduction 20 years ago. When Java was introduced in web browsers, a torrent of publicity welcomed the arrival of the new language.

Sun Microsystems cofounder Bill Joy proclaimed, This represents the end result of nearly 15 years of trying to come up with a better programming language and environment for building simpler and more reliable software.