Core Java for the Impatient, 4th Edition 289926

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, Fourth Edition, is a complete yet concise guide that reflects all changes through Java SE 21, 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 21, 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.

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.

Preface

Acknowledgments

1.1. Our First Program

1.2. Primitive Types

1.3. Variables

1.4. Arithmetic Operations

1.5. Strings

1.6. Input and Output

1.7. Control Flow

1.8. Arrays and Array Lists

1.9. Functional Decomposition

Exercises

2.1. Working with Objects

2.2. Implementing Classes

2.3. Object Construction

2.4. Records

2.5. Static Variables and Methods

2.6. Packages

2.7. Nested Classes

2.8. Documentation Comments

Exercises

3.1. Interfaces

3.2. Static, Default, and Private Methods

3.3. Examples of Interfaces

3.4. Lambda Expressions

3.5. Method and Constructor References

3.6. Processing Lambda Expressions

3.7. Lambda Expressions and Variable Scope

3.8. Higher-Order Functions

3.9. Local and Anonymous Classes

Exercises

4.1. Extending a Class

4.2. Inheritance Hierarchies

4.3. Object: The Cosmic Superclass

4.4. Enumerations

4.5. Pattern Matching

4.6. Runtime Type Information and Resources

4.7. Reflection

Exercises

5.1. Exception Handling

5.2. Assertions

5.3. Logging

Exercises

6.1. Generic Classes

6.2. Generic Methods

6.3. Type Bounds

6.4. Type Variance and Wildcards

6.5. Generics in the Java Virtual Machine

6.6. Restrictions on Generics

6.7. Reflection and Generics

Exercises

7.1. An Overview of the Collections Framework

7.2. Iterators

7.3. Sets

7.4. Maps

7.5. Other Collections

7.6. Views

Exercises

8.1. From Iterating to Stream Operations

8.2. Stream Creation

8.3. The filter, map, and flatMap Methods

8.4. Extracting Substreams and Combining Streams

8.5. Other Stream Transformations

8.6. Simple Reductions

8.7. The Optional Type

8.8. Collecting Results

8.9. Collecting into Maps

8.10. Grouping and Partitioning

8.11. Downstream Collectors

8.12. Reduction Operations

8.13. Primitive Type Streams

8.14. Parallel Streams

Exercises

9.1. Input/Output Streams, Readers, and Writers

9.2. Paths, Files, and Directories

9.3. HTTP Connections

9.4. Regular Expressions

9.5. Serialization

Exercises

10.1. Concurrent Tasks

10.2. Thread Safety

10.3. Threadsafe Data Structures

10.4. Parallel Algorithms

10.5. Asynchronous Computations

10.6. Atomic Counters and Accumulators

10.7. Locks and Conditions

10.8. Threads

10.9. Processes

Exercises

11.1. Using Annotations

11.2. Defining Annotations

11.3. Annotations in the Java API

11.4. Processing Annotations at Runtime

11.5. Source-Level Annotation Processing

Exercises

12.1. The Module Concept

12.2. Naming Modules

12.3. The Modular “Hello, World!” Program

12.4. Requiring Modules

12.5. Exporting Packages

12.6. Modules and Reflective Access

12.7. Modular JARs

12.8. Automatic Modules

12.9. The Unnamed Module

12.10. Command-Line Flags for Migration

12.11. Transitive and Static Requirements

12.12. Qualified Exporting and Opening

12.13. Service Loading

12.14. Tools for Working with Modules

Exercises

Index