Core Java SE 9 for the Impatient

An Accessible Guide to the Java Language and Libraries   Modern Java introduces major enhancements that impact the core Java technologies and APIs at the heart of the Java platform. Many old Java idioms are no longer needed and new features such as modularization make you far more effective. However, navigating these changes can be challenging.   Core Java® SE 9 for the Impatient, Second Edition, is a complete yet concise guide that includes all the latest changes up to Java SE 9. Written by Cay S. Horstmann–author of the classic two-volume Core Java–this indispensable tutorial offers a faster, easier pathway for learning modern Java. Given Java SE 9’s size and the scope of its enhancements, there’s plenty to cover, but it’s presented in small chunks organized for quick access and easy understanding.   Horstmann’s practical insights and sample code help you quickly take advantage of all that’s new, from Java SE 9’s long-awaited “Project Jigsaw” module system to the improvements first introduced in Java SE 8, including lambda expressions and streams. Use modules to simplify the development of well-performing complex systems Migrate applications to work with the modularized Java API and third-party modules Test code as you create it with the new JShell Read-Eval-Print Loop (REPL) Use lambda expressions to express actions more concisely Streamline and optimize data management with today’s Streams API Leverage modern concurrent programming based on cooperating tasks Take advantage of a multitude of API improvements for working with collections, input/output, regular expressions, and processes Whether you’re just getting started with modern Java or you’re an experienced developer, this guide will help you write tomorrow’s most robust, efficient, and secure Java code. Register your product at informit.com/register for convenient access to downloads, updates, and/or corrections as they become available.

Table of Contents:
Preface xxi Acknowledgments xxiii About the Author xxv   Chapter 1: Fundamental Programming Structures 1 1.1 Our First Program 2 1.2 Primitive Types 10 1.3 Variables 14 1.4 Arithmetic Operations 17 1.5 Strings 24 1.6 Input and Output 32 1.7 Control Flow 36 1.8 Arrays and Array Lists 43 1.9 Functional Decomposition 52 Exercises 54   Chapter 2: Object-Oriented Programming 59 2.1 Working with Objects 60 2.2 Implementing Classes 65 2.3 Object Construction 69 2.4 Static Variables and Methods 74 2.5 Packages 78 2.6 Nested Classes 85 2.7 Documentation Comments 90 Exercises 95   Chapter 3: Interfaces and Lambda Expressions 99 3.1 Interfaces 100 3.2 Static, Default, and Private Methods 105 3.3 Examples of Interfaces 109 3.4 Lambda Expressions 113 3.5 Method and Constructor References 116 3.6 Processing Lambda Expressions 119 3.7 Lambda Expressions and Variable Scope 124 3.8 Higher-Order Functions 127 3.9 Local and Anonymous Classes 129 Exercises 131   Chapter 4: Inheritance and Reflection 135 4.1 Extending a Class 136 4.2 Object: The Cosmic Superclass 145 4.3 Enumerations 154 4.4 Runtime Type Information and Resources 159 4.5 Reflection 168 Exercises 177   Chapter 5: Exceptions, Assertions, and Logging 181 5.1 Exception Handling 182 5.2 Assertions 193 5.3 Logging 195 Exercises 203   Chapter 6: Generic Programming 207 6.1 Generic Classes 208 6.2 Generic Methods 209 6.3 Type Bounds 210 6.4 Type Variance and Wildcards 211 6.5 Generics in the Java Virtual Machine 216 6.6 Restrictions on Generics 220 6.7 Reflection and Generics 226 Exercises 229   Chapter 7: Collections 235 7.1 An Overview of the Collections Framework 236 7.2 Iterators 240 7.3 Sets 242 7.4 Maps 243 7.5 Other Collections 247 7.6 Views 252 Exercises 255   Chapter 8: Streams 259 8.1 From Iterating to Stream Operations 260 8.2 Stream Creation 261 8.3 The filter, map, and flatMap Methods 263 8.4 Extracting Substreams and Combining Streams 264 8.5 Other Stream Transformations 265 8.6 Simple Reductions 266 8.7 The Optional Type 267 8.8 Collecting Results 271 8.9 Collecting into Maps 273 8.10 Grouping and Partitioning 274 8.11 Downstream Collectors 275 8.12 Reduction Operations 277 8.13 Primitive Type Streams 279 8.14 Parallel Streams 280 Exercises 283   Chapter 9: Processing Input and Output 287 9.1 Input/Output Streams, Readers, and Writers 288 9.2 Paths, Files, and Directories 298 9.3 HTTP Connections 306 9.4 Regular Expressions 310 9.5 Serialization 319 Exercises 325   Chapter 10: Concurrent Programming 329 10.1 Concurrent Tasks 330 10.2 Asynchronous Computations 335 10.3 Thread Safety 341 10.4 Parallel Algorithms 348 10.5 Threadsafe Data Structures 350 10.6 Atomic Counters and Accumulators 354 10.7 Locks and Conditions 357 10.8 Threads 362 10.9 Processes 366 Exercises 371   Chapter 11: Annotations 377 11.1 Using Annotations 378 11.2 Defining Annotations 383 11.3 Standard Annotations 386 11.4 Processing Annotations at Runtime 391 11.5 Source-Level Annotation Processing 394 Exercises 398   Chapter 12: The Date and Time API 401 12.1 The Time Line 402 12.2 Local Dates 404 12.3 Date Adjusters 407 12.4 Local Time 409 12.5 Zoned Time 410 12.6 Formatting and Parsing 413 12.7 Interoperating with Legacy Code 416 Exercises 417   Chapter 13: Internationalization 421 13.1 Locales 422 13.2 Number Formats 427 13.3 Currencies 428 13.4 Date and Time Formatting 429 13.5 Collation and Normalization 431 13.6 Message Formatting 433 13.7 Resource Bundles 435 13.8 Character Encodings 438 13.9 Preferences 439 Exercises 441   Chapter 14: Compiling and Scripting 443 14.1 The Compiler API 444 14.2 The Scripting API 448 14.3 The Nashorn Scripting Engine 452 14.4 Shell Scripting with Nashorn 461 Exercises 464   Chapter 15: The Java Platform Module System 469 15.1 The Module Concept 470 15.2 Naming Modules 472 15.3 The Modular “Hello, World!” Program 472 15.4 Requiring Modules 474 15.5 Exporting Packages 476 15.6 Modules and Reflective Access 479 15.7 Modular JARs 482 15.8 Automatic Modules and the Unnamed Module 484 15.9 Command-Line Flags for Migration 485 15.10 Transitive and Static Requirements 487 15.11 Qualified Exporting and Opening 489 15.12 Service Loading 490 15.13 Tools for Working with Modules 491 Exercises 494   Index 497