Java in a Nutshell: A Desktop Quick Reference

Description

This updated edition of Java in a Nutshell not only helps experienced Java programmers get the most out of Java versions 9 through 11, it’s also 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 Java Concurrency Utilities. The book’s 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, including Java 9-11 changes - Learn object-oriented programming, using basic Java syntax - Explore generics, enumerations, annotations, and lambda expressions - Understand basic techniques used in object-oriented design - Examine concurrency and memory, and how they’re intertwined - Work with Java collections and handle common data formats - Delve into Java’s latest I/O APIs, including asynchronous channels - Use Nashorn to execute JavaScript on the Java Virtual Machine - Become familiar with development tools in OpenJDK Changes in the Seventh Edition: The sixth edition of this book covers Java 8, whereas this edition covers Java 11. However, the release process of Java changed significantly with the advent of Java 9, so this book is released only a year after Java 9 arrived. Java 11 is also the first long-term support (LTS) release of Java since Java 8, so it seems likely that many Java shops will jump straight to Java 11 from Java 8. With the seventh edition we have tried to update the concept of what it means to be a “Nutshell” guide. The modern Java developer needs to know more than just syntax and APIs. As the Java environment has matured, such topics as concurrency, object-oriented design, memory, and the Java type system have all grown in importance—even among mainstream developers. In this edition, we have taken the approach that only the most recent versions of Java are likely to be of interest to the majority of Java developers, so we usually only call out when new features arrived if it was with Java 8 or later. The module system (that arrived with Java 9) is still likely to be new for at least some developers, and it represents a major change. Cover......Page 1 Table of Contents......Page 6 Foreword......Page 10 Preface......Page 12 Part I. Introducting Java......Page 18 1. Introduction to the Java Environment......Page 20 The Language, the JVM, and the Ecosystem......Page 21 A Brief History of Java and the JVM......Page 25 The Lifecycle of a Java Program......Page 27 Java Security......Page 29 Comparing Java to Other Languages......Page 30 Answering Some Criticisms of Java......Page 31 2. Java Syntax from the Ground Up......Page 36 Lexical Structure......Page 37 Primitive Data Types......Page 41 Expressions and Operators......Page 50 Statements......Page 67 Methods......Page 88 Introduction to Classes and Objects......Page 95 Arrays......Page 99 Reference Types......Page 107 Packages and the Java Namespace......Page 111 Java Source File Structure......Page 116 Summary......Page 117 Overview of Classes......Page 120 Fields and Methods......Page 123 Creating and Initializing Objects......Page 129 Subclasses and Inheritance......Page 133 Data Hiding and Encapsulation......Page 145 Abstract Classes and Methods......Page 153 Modifier Summary......Page 157 4. The Java Type System......Page 160 Interfaces......Page 161 Java Generics......Page 169 Enums and Annotations......Page 181 Lambda Expressions......Page 186 Nested Types......Page 194 Non-Denotable Types and var......Page 205 Summary......Page 206 Java Values......Page 208 Important Methods of java.lang.Object......Page 209 Aspects of Object-Oriented Design......Page 214 Object-Oriented Design with Lambdas......Page 225 Exceptions and Exception Handling......Page 228 Safe Java Programming......Page 230 Basic Concepts of Java Memory Management......Page 232 How the JVM Optimizes Garbage Collection......Page 237 The HotSpot Heap......Page 239 Finalization......Page 243 Java's Support for Concurrency......Page 246 Working with Threads......Page 257 Summary......Page 259 Part II. Working with the Java Platform......Page 260 Naming and Capitalization Conventions......Page 262 Practical Naming......Page 264 Java Documentation Comments......Page 266 Doclets......Page 274 Conventions for Portable Programs......Page 275 Introduction to Collections API......Page 278 Java Streams and Lambda Expressions......Page 300 Summary......Page 308 Text......Page 310 Numbers and Math......Page 318 Java 8 Date and Time......Page 323 Summary......Page 329 Classic Java I/O......Page 330 Modern Java I/O......Page 336 NIO Channels and Buffers......Page 340 Async I/O......Page 342 Networking......Page 345 Class Files, Class Objects, and Metadata......Page 352 Phases of Classloading......Page 354 Secure Programming and Classloading......Page 357 Applied Classloading......Page 359 Reflection......Page 362 Method Handles......Page 368 12. Java Platform Modules......Page 372 Why Modules?......Page 373 Writing Your Own Modules......Page 376 Issues with Modules......Page 386 Summary......Page 388 Command-Line Tools......Page 390 Introduction to JShell......Page 406 Summary......Page 409 A. Additional Tools......Page 410 Index......Page 432