Java 7 Pocket Guide, 2nd Edition: Instant Help for Java Programmers

215 Pages·2013·87.37 MB·English

by  Robert Liguori, Patricia Liguori

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SECOND EDITION
Java 7 Pocket Guide
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Java 7 Pocket Guide, Second Edition
by Robert Liguori and Patricia Liguori
Copyright © 2013 Gliesian, LLC. All rights reserved.
Printed in the United States of America.
Published by O’Reilly Media, Inc., 1005 Gravenstein Highway North, Sebasto‐
pol, CA 95472.
O’Reilly books may be purchased for educational, business, or sales promotional
use. Online editions are also available for most titles (http://my.safaribookson
line.com). For more information, contact our corporate/institutional sales de‐
partment: 800-998-9938 or [email protected].
Editors: Mike Loukides and Meghan Blanchette
Production Editor: Rachel Steely
Copyeditor: Jasmine Kwityn
Proofreader: Charles Roumeliotis
Indexer: Ellen Troutman
Cover Designer: Randy Comer
Interior Designer: David Futato
Illustrator: Rebecca Demarest
July 2013: Second Edition
Revision History for the Second Edition:
2013-07-03: First release
See http://oreilly.com/catalog/errata.csp?isbn=9781449343569 for release de‐
tails.
Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are
registered trademarks of O’Reilly Media, Inc. The Pocket Guide series designa‐
tions, Java 7 Pocket Guide, the image of a Javan tiger, and related trade dress are
trademarks of O’Reilly Media, Inc.
Many of the designations used by manufacturers and sellers to distinguish their
products are claimed as trademarks. Where those designations appear in this
book, and O’Reilly Media, Inc., was aware of a trademark claim, the designations
have been printed in caps or initial caps.
While every precaution has been taken in the preparation of this book, the
publisher and authors assume no responsibility for errors or omissions, or for
damages resulting from the use of the information contained herein.
ISBN: 978-1-449-34356-9
[M]
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This book is dedicated to our beautiful, awesome-tastic daughter,
Ashleigh.
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Table of Contents
Preface xi
Part I. Language
Chapter 1: Naming Conventions 3
Class Names 3
Interface Names 3
Method Names 4
Instance and Static Variable Names 4
Parameter and Local Variable Names 4
Generic Type Parameter Names 4
Constant Names 5
Enumeration Names 5
Package Names 5
Acronyms 6
Chapter 2: Lexical Elements 7
Unicode and ASCII 7
Comments 9
Keywords 10
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Identifiers 11
Separators 12
Operators 12
Literals 13
Escape Sequences 16
Unicode Currency Symbols 17
Chapter 3: Fundamental Types 19
Primitive Types 19
Literals for Primitive Types 20
Floating-Point Entities 21
Numeric Promotion of Primitive Types 24
Wrapper Classes 25
Autoboxing and Unboxing 26
Chapter 4: Reference Types 29
Comparing Reference Types to Primitive Types 30
Default Values 30
Conversion of Reference Types 32
Converting Between Primitives and Reference Types 33
Passing Reference Types into Methods 33
Comparing Reference Types 35
Copying Reference Types 38
Memory Allocation and Garbage Collection of
Reference Types 39
Chapter 5: Object-Oriented Programming 41
Classes and Objects 41
Variable-Length Argument Lists 47
Abstract Classes and Abstract Methods 49
Static Data Members, Static Methods, Static Constants, and
Static Initializers 50
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Interfaces 51
Enumerations 52
Annotation Types 53
Chapter 6: Statements and Blocks 55
Expression Statements 55
Empty Statement 56
Blocks 56
Conditional Statements 56
Iteration Statements 58
Transfer of Control 60
Synchronized Statement 62
Assert Statement 62
Exception Handling Statements 63
Chapter 7: Exception Handling 65
The Exception Hierarchy 65
Checked/Unchecked Exceptions and Errors 66
Common Checked/Unchecked Exceptions and Errors 67
Exception Handling Keywords 69
The Exception Handling Process 74
Defining Your Own Exception Class 75
Printing Information About Exceptions 75
Chapter 8: Java Modifiers 79
Access Modifiers 80
Other (Nonaccess) Modifiers 81
Part II. Platform
Chapter 9: Java Platform, SE 85
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Common Java SE API Libraries 86
Chapter 10: Development Basics 99
Java Runtime Environment 99
Java Development Kit 99
Java Program Structure 100
Command-Line Tools 102
Classpath 109
Chapter 11: Memory Management 111
Garbage Collectors 111
Memory Management Tools 113
Command-Line Options 114
Resizing the JVM Heap 117
Interfacing with the GC 117
Chapter 12: Basic Input and Output 119
Standard Streams in, out, and err 119
Class Hierarchy for Basic Input and Output 120
File Reading and Writing 121
Socket Reading and Writing 123
Serialization 124
Zipping and Unzipping Files 126
File and Directory Handling 127
Chapter 13: NIO 2.0 Quicklook 129
The Path Interface 129
The Files Class 130
Additional Features 131
Chapter 14: Concurrency 133
Creating Threads 133
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