"Functional Programming in Java: From Basics to Expert Proficiency" is an authoritative guide that bridges the gap between traditional object-oriented programming and the modern functional programming paradigm in Java. This book meticulously covers the foundational principles of functional programming, elucidating core concepts such as pure functions, immutability, and higher-order functions. With practical examples and best practices woven throughout, readers will gain a comprehensive understanding of how to leverage Java's functional programming capabilities to write more concise, expressive, and efficient code.

The book progressively transitions to advanced topics, including functional error handling, concurrency, and parallelism, demonstrating their practical applications in real-world scenarios. Through the use of lambda expressions, streams, and popular functional libraries, developers will learn to implement sophisticated functional programming techniques in their projects. Whether you are new to functional programming or looking to deepen your expertise, this book is crafted to enhance your proficiency and elevate your Java programming skills to the next level.