Java in a Nutshell: A Desktop Quick Reference

by Benjamin J Evans, Jason Clark, David Flanagan

Overview

This updated edition of the Nutshell guide not only helps experienced Java programmers get the most out of versions through Java 17, it also serves as a learning path for new developers. Chock-full of examples that demonstrate how to take complete advantage of modern Java APIs and development best practices, this thoroughly revised book includes new material on recent enhancements to the Java object model that every developer should know about.

The first section provides a fast-paced, no-fluff introduction to the Java programming language and the core runtime aspects of the Java platform. The second section is a reference to core concepts and APIs that explains how to perform real programming work in the Java environment.

• Get up to speed on language details through Java 17
• Learn object-oriented programming using basic Java syntax
• Explore generics, enumerations, annotations, and lambda expressions
• Understand techniques used in object-oriented design
• Examine how concurrency and memory are intertwined
• Work with Java collections and handle common data formats
• Delve into Java's latest I/O APIs including asynchronous channels
• Become familiar with development tools in OpenJDK

Product Details

ISBN-13:	9781098130961
Publisher:	O'Reilly Media, Incorporated
Publication date:	02/14/2023
Sold by:	Barnes & Noble
Format:	eBook
Pages:	482
File size:	2 MB

About the Author

Ben Evans is a Java Champion and Senior Principal Software Engineer at Red Hat. Previously he was Lead Architect for Instrumentation at New Relic, and co-founded jClarity, a performance tools startup acquired by Microsoft. He has also worked as Chief Architect for Listed Derivatives at Deutsche Bank and as Senior Technical Instructor for Morgan Stanley. He served for 6 years on the Java Community Process Executive Committee, helping define new Java standards. Ben is the author of six books, including "Optimizing Java", the new editions of â??Java in a Nutshellâ? and the recently-updated â??The Well-Grounded Java Developerâ? and writes regularly for Oracle's Java Magazine and other industry publications.

Jason Clark is a Principal Engineer and Architect at New Relic where he's worked on everything from petabyte-scale JVM data processing pipelines to Ruby instrumentation libraries. He was previously an Architect at WebMD building .Net-based web services. Jason is a regular conference speaker and co-author of The Well-Grounded Java Developer.

David Flanagan is a computer programmer who spends most of his time writing about JavaScript and Java. His books with O'Reilly include Java in a Nutshell, Java Examples in a Nutshell, Java Foundation Classes in a Nutshell, JavaScript: The Definitive Guide, and JavaScript Pocket Reference. David has a degree in computer science and engineering from the Massachusetts Institute of Technology.

Table of Contents

Foreword ix

Preface xi

Part I Introducing Java

1 Introduction to the Java Environment 3

The Language, the JVM, and the Ecosystem 3

A Brief History of Java and the JVM 7

The Lifecycle of a Java Program 9

Java Security 11

Comparing Java to Other Languages 11

Answering Some Criticisms of Java 13

2 Java Syntax from the Ground Up 17

Java Programs from the Top Down 18

Lexical Structure 18

Primitive Data Types 22

Expressions and Operators 30

Statements 46

Methods 66

Introduction to Classes and Objects 72

Arrays 77

Reference Types 84

Packages and the Java Namespace 88

Java File Structure 93

Defining and Running Java Programs 94

Summary 95

3 Object-Oriented Programming in Java 97

Overview of Classes 97

Fields and Methods 100

Creating and Initializing Objects 106

Subclasses and Inheritance 110

Data Hiding and Encapsulation 121

Abstract Classes and Methods 128

Modifier Summary 132

4 The Java Type System 135

Interfaces 136

Java Generics 142

Enums and Annotations 151

Nested Types 155

Lambda Expressions 171

Conclusion 174

5 Introduction to Object-Oriented Design in Java 177

Java Values 177

Important Methods of java.lang.Object 178

Aspects of Object-Oriented Design 183

Exceptions and Exception Handling 193

Safe Java Programming 195

6 Java's Approach to Memory and Concurrency 197

Basic Concepts of Java Memory Management 197

How the JVM Optimizes Garbage Collection 201

The HotSpot Heap 203

Finalization 206

Java's Support for Concurrency 208

Working with Threads 218

Summary 219

Part II Working with the Java Platform

7 Programming and Documentation Conventions 223

Naming and Capitalization Conventions 223

Practical Naming 225

Java Documentation Comments 226

Conventions for Portable Programs 235

8 Working with Java Collections 239

Introduction to Collections API 239

Lambda Expressions in the Java Collections 258

Conclusion 266

9 Handling Common Data Formats 267

Text 267

Numbers and Math 275

Java 8 Date and Time 280

Conclusion 287

10 File Handling and I/O 289

Classic Java I/O 289

Modern Java I/O 295

NIO Channels and Buffers 298

Async I/O 301

Networking 304

11 Classloading, Reflection, and Method Handles 311

Class Files, Class Objects, and Metadata 311

Phases of Classloading 313

Secure Programming and Classloading 315

Applied Classloading 317

Reflection 320

Dynamic Proxies 325

Method Handles 326

12 Nashorn 331

Introduction to Nashorn 331

Executing JavaScript with Nashorn 332

Nashorn and javax.script 340

Advanced Nashorn 342

Conclusion 347

13 Platform Tools and Profiles 349

Command-Line Tools 349

VisualVM 362

Java 8 Profiles 367

Conclusion 372

Index 373