Core Java for the Impatient

Clear, Concise Guide to the Core Language and Libraries--Updated through Java 17 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 and programming paradigms can make you far more effective. However, navigating these changes can be challenging. Core Java for the Impatient, Third Edition, is a complete yet concise guide that reflects all changes through Java SE 17, Oracle's latest Long-Term Support (LTS) release. 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. Horstmann covers everything working developers need to know, including the powerful concepts of lambda expressions and streams, modern constructs such as records and sealed classes, and sophisticated concurrent programming techniques. Given the size and scope of Java 17, there's plenty to cover, but it's presented in small chunks organized for quick access and easy understanding, with plenty of practical insights and sample code to help you quickly apply all that's new. Test code as you create it with JShell Improve your object-oriented design with records and sealed classes Effectively use text blocks, switch expressions, and pattern matching Understand functional programming with lambda expressions Streamline and optimize data management with the Streams API Use modern library features and threadsafe data structures to implement concurrency reliably Work with the modularized Java API and third-party modules Take advantage of API improvements for working with collections, input/output, regular expressions, and processes Learn the APIs for date/time processing and internationalization Whether you're an experienced developer just getting started with modern Java, or have been programming with Java for years, this guide will help you write more robust, efficient, and secure Java code. Register your book for convenient access to downloads, updates, and/or corrections as they become available. See inside book for details.

Table of Contents:
Preface xxiii Acknowledgments xxv About the Author xxvii Chapter 1: Fundamental Programming Structures 1 1.1 Our First Program 2 1.2 Primitive Types 11 1.3 Variables 14 1.4 Arithmetic Operations 17 1.5 Strings 25 1.6 Input and Output 35 1.7 Control Flow 38 1.8 Arrays and Array Lists 46 1.9 Functional Decomposition 56 Exercises 58 Chapter 2: Object-Oriented Programming 61 2.1 Working with Objects 62 2.2 Implementing Classes 67 2.3 Object Construction 71 2.4 Records 76 2.5 Static Variables and Methods 79 2.6 Packages 83 2.7 Nested Classes 90 2.8 Documentation Comments 95 Exercises 100 Chapter 3: Interfaces and Lambda Expressions 105 3.1 Interfaces 106 3.2 Static, Default, and Private Methods 113 3.3 Examples of Interfaces 117 3.4 Lambda Expressions 121 3.5 Method and Constructor References 124 3.6 Processing Lambda Expressions 127 3.7 Lambda Expressions and Variable Scope 131 3.8 Higher-Order Functions 135 3.9 Local and Anonymous Classes 137 Exercises 139 Chapter 4: Inheritance and Reflection 143 4.1 Extending a Class 144 4.2 Inheritance Hierarchies 150 4.3 Object: The Cosmic Superclass 157 4.4 Enumerations 166 4.5 Runtime Type Information and Resources 170 4.6 Reflection 179 Exercises 188 Chapter 5: Exceptions, Assertions, and Logging 191 5.1 Exception Handling 192 5.2 Assertions 204 5.3 Logging 206 Exercises 214 Chapter 6: Generic Programming 219 6.1 Generic Classes 220 6.2 Generic Methods 221 6.3 Type Bounds 222 6.4 Type Variance and Wildcards 223 6.5 Generics in the Java Virtual Machine 228 6.6 Restrictions on Generics 231 6.7 Reflection and Generics 238 Exercises 241 Chapter 7: Collections 247 7.1 An Overview of the Collections Framework 248 7.2 Iterators 252 7.3 Sets 254 7.4 Maps 255 7.5 Other Collections 259 7.6 Views 264 Exercises 267 Chapter 8: Streams 271 8.1 From Iterating to Stream Operations 272 8.2 Stream Creation 273 8.3 The filter, map, and flatMap Methods 276 8.4 Extracting Substreams and Combining Streams 278 8.5 Other Stream Transformations 279 8.6 Simple Reductions 280 8.7 The Optional Type 281 8.8 Collecting Results 286 8.9 Collecting into Maps 287 8.10 Grouping and Partitioning 289 8.11 Downstream Collectors 289 8.12 Reduction Operations 292 8.13 Primitive Type Streams 294 8.14 Parallel Streams 295 Exercises 298 Chapter 9: Processing Input and Output 301 9.1 Input/Output Streams, Readers, and Writers 302 9.2 Paths, Files, and Directories 312 9.3 HTTP Connections 320 9.4 Regular Expressions 323 9.5 Serialization 333 Exercises 344 Chapter 10: Concurrent Programming 347 10.1 Concurrent Tasks 348 10.2 Asynchronous Computations 353 10.3 Thread Safety 360 10.4 Parallel Algorithms 366 10.5 Threadsafe Data Structures 368 10.6 Atomic Counters and Accumulators 373 10.7 Locks and Conditions 375 10.8 Threads 381 10.9 Processes 386 Exercises 390 Chapter 11: Annotations 397 11.1 Using Annotations 398 11.2 Defining Annotations 403 11.3 Standard Annotations 406 11.4 Processing Annotations at Runtime 410 11.5 Source-Level Annotation Processing 413 Exercises 417 Chapter 12: The Date and Time API 421 12.1 The Time Line 422 12.2 Local Dates 424 12.3 Date Adjusters 428 12.4 Local Time 429 12.5 Zoned Time 430 12.6 Formatting and Parsing 433 12.7 Interoperating with Legacy Code 436 Exercises 437 Chapter 13: Internationalization 441 13.1 Locales 442 13.2 Number Formats 447 13.3 Currencies 448 13.4 Date and Time Formatting 449 13.5 Collation and Normalization 451 13.6 Message Formatting 453 13.7 Resource Bundles 455 13.8 Character Encodings 458 13.9 Preferences 459 Exercises 461 Chapter 14: Compiling and Scripting 463 14.1 The Compiler API 463 14.2 The Scripting API 467 Exercises 472 Chapter 15: The Java Platform Module System 475 15.1 The Module Concept 476 15.2 Naming Modules 478 15.3 The Modular “Hello, World!” Program 478 15.4 Requiring Modules 480 15.5 Exporting Packages 482 15.6 Modules and Reflective Access 485 15.7 Modular JARs 488 15.8 Automatic Modules 489 15.9 The Unnamed Module 491 15.10 Command-Line Flags for Migration 491 15.11 Transitive and Static Requirements 493 15.12 Qualified Exporting and Opening 495 15.13 Service Loading 496 15.14 Tools for Working with Modules 497 Exercises 499 Index 501