This Book will surely change your approach to Java Functional programming .This is one of the simplest Book for Java Functional Programming on the planet.

Before scripting any feature , I used to ask 4 questions to myself-
What is this feature all about ? 
Why am I going for it ? 
Where can I use it in realtime ? 
Finally How can I implement it ?
 
I have tried to simplify the concept of Streams and Lambda with help of sketch/images in-order to make it self explanatory.

In This Book I have covered industry trending concepts like Streams,Lambda,Method Reference, Functional Interfaces and other most commonly used Java features from Java 8 to Java 25.

This book is an insightful and practical guide that takes readers on a journey into the world of functional programming, exploring key concepts such as functional programming paradigms, streams, lambda expressions, and method references. This book is an essential resource for both beginners and experienced programmers looking to unlock the full potential of functional programming in their software development projects.

The book begins by demystifying functional programming, providing a clear understanding of its principles and benefits. It emphasizes the use of pure functions, immutability, and higher-order functions to write clean, maintainable, and efficient code.


Why This Book Stands Out:
Drawing on over a decade of core software development experience, the author provides an insightful and practical guide that simplifies complex concepts using sketches and images. This book is not just for reading but for understanding and implementing functional programming in real-world scenarios.
 
Key Concepts Covered:
Functional Programming Paradigms: Gain a clear understanding of the principles and benefits of functional programming, including pure functions, immutability, and higher-order functions.
Streams: Learn to manipulate data with streams using operations like map, filter, and reduce. Discover the power of lazy evaluation for performance improvements.
Lambda Expressions: Explore how to create and use lambda functions to write flexible and concise code.
Method References: Leverage method references to simplify your code, enhancing readability and maintainability.
Functional Interfaces: Dive deep into functional interfaces and their practical applications.
Realtime Code Walkthrough : Real time code walkthrough for Developers friendly features that we as developers used to have in day to day coding.
 
Why You Should Buy This Book:
Comprehensive Coverage: From foundational principles to advanced features, this book covers all you need to know about Java functional programming.
Practical Examples: Real-world examples and industry best practices make the concepts easy to understand and apply.
Clear and Simple: The use of sketches and images makes even the most complex concepts self-explanatory.
Expert Insight: Benefit from the author's 10 years of software development experience and deep knowledge of Java.
Industry-Relevant: Stay up-to-date with the latest trends and features from Java 8 to Java 25.
 
 
About the Author
 
Amitesh Kumar Ray is a seasoned software engineer with 12 years of product development experience, currently serving as a Lead SDE at M2P Fintech, Bangalore. He holds a System Design & Architecture certification from the University of Alberta and is currently pursuing an Advanced Certification in AI & ML from IIT Madras—a testament to his commitment to continuous learning.
 
Over the years, Amitesh has authored 15+ technical books on Java, Spring Boot, Microservices, and System Design, many of which have been widely appreciated by developers across the globe. Having conducted 700+ technical interviews and mentored more than 20,000 professionals, he brings a rare insider perspective into how interviews work, what companies truly evaluate, and how developers can grow with clarity and confidence.
 
Driven by a passion for simplifying complex concepts, he continues to contribute to the developer community through his books, mentorship, and ongoing technical discussions—helping engineers at every stage of their career unlock their full potential.