Preface

The super-fast evolution of the JDK between versions 12 and 21 means two things: first, Java now has a host of powerful new features that you can adopt to solve a variety of modern-day problems; second, the learning curve of modern Java is becoming very steep.

This book enables you to take an objective approach to solving common problems by explaining the correct practices and decisions you need to make with respect to complexity, performance, readability, and more.

Java Coding Problems, Second Edition, will help you complete your daily tasks and meet deadlines, all while becoming a more proficient and self-sufficient Java developer. You can count on the 270+ (all brand-new for this edition) problems in this book to cover the most common and fundamental areas of interest: strings, numbers, arrays, collections, the Foreign Function and Memory API, data structures, date and time, pattern matching, sealed/hidden classes, functional programming, virtual threads, Structured Concurrency, Garbage Collectors, Dynamic CDS Archives, the Socket API, and Simple Web Server.

Put your skills on steroids with problems that have been carefully crafted to highlight and teach the core knowledge needed for daily work. In other words (no matter if your task is simple, middling, or complex), having this knowledge in your tool belt is a must, not an option.

By the end of this book, you will have gained a strong understanding of Java concepts, and you’ll have the confidence to develop and choose the right solutions to all your Java problems.

While this book is entirely stand-alone, and you do not need anything else to get the most out of it, many of the topics covered in this book are also explored in Java Coding Problems, First Edition. If you haven’t already read it, and you wish to get even more practice in, then consider picking that book up for a completely different set of Java problems.