Java Functional Programming

Using Functional Programming in Java, for highly maintainable projects. Learn to write cleaner, more expressive code using lambdas, streams, and functional design patterns.

Java Functional Programming

Using Functional Programming in Java, for highly maintainable projects. Learn to write cleaner, more expressive code using lambdas, streams, and functional design patterns.

Overview

Functional programming has become an essential paradigm in modern Java development. Since Java 8, the language has embraced functional concepts that enable developers to write more concise, readable, and maintainable code.

This course provides a deep dive into functional programming concepts and their application in Java. You will learn to leverage lambdas, method references, the Streams API, and functional interfaces to solve complex problems elegantly. Through practical exercises, you will understand how to combine object-oriented and functional programming styles to create robust, maintainable applications.

Objectives

The main objectives of the Java Functional Programming course are:

Understanding functional programming principles: immutability, pure functions, and higher-order functions
Mastering lambda expressions and method references
Working effectively with functional interfaces (Function, Predicate, Consumer, Supplier)
Advanced Stream API operations: parallel streams, collectors, and custom collectors
Using Optional effectively for null-safe programming
Applying functional design patterns and refactoring imperative code
Understanding when to apply functional vs. object-oriented approaches

Duration and Schedule

The standard course duration is 3 days, with 6 or 7 hours of teaching each day. Additional time can be allocated for code review and refactoring exercises.

The scheduling per day:

Day 1: Functional programming fundamentals, lambdas, and functional interfaces
Day 2: Streams API deep-dive, collectors, and parallel processing
Day 3: Optional, functional patterns, refactoring, and hands-on workshop

Target Audience

This course is designed for Java developers wanting to leverage functional programming:

Java Developers - looking to modernize their coding style
Teams - adopting functional patterns in their codebase
Technical Leads - establishing coding standards and best practices
Developers from Functional Languages - applying their knowledge in Java
Anyone - interested in writing cleaner, more expressive Java code

Write Better Java Code

Prerequisites

Here are the prerequisites for the Java Functional Programming course:

Solid Java knowledge: comfortable with Java syntax and OOP concepts
Java 8+ familiarity: basic awareness of lambda syntax is helpful
Collections experience: understanding of Java collections framework
Problem-solving mindset: willingness to think about problems differently

Testimonials

We really enjoyed Bogdan's training sessions. It's always cool to learn and have fun while doing them. He is very patient and always prepared to offer the best solution/explanation for any problem/question. ... I also love his ability to extend the context for each chapter, offering many smart hooks to integrate the concept in a broader picture, which makes it all easier to understand.

Sorin, Crossover

Bogdan is our coach who helped shape our vision to use Java and Spring/SpringBoot in today's marketplace. He is highly skilled, extremely passionate and has a strong work ethic. With his unique and practical approach, he taught us from technology fundamentals on up to software design and best practices. He is continuously helping us progress on a growing path in software development. I enjoy working with Bogdan very much and I consider him a friend.

Andrei, Óce

When we approached Bogdan for a Java training, our goal was to up-skill our team of PL/SQL developers in order to become proficient in Java. Bogdan has vast experience in the topics and very good communication and presentation skills. The pace was very good and he was very thorough in responding all questions, providing lots of related documentation for further study.

Radu, Nokia

Working with Bogdan is really inspiring and I always learn something new from his training and coaching sessions. All the training sessions are well-structured, use examples and employ hands-on components. What I enjoyed most during his training sessions is that they made me eager to learn more and to extend my knowledge. And it's not hard to do, thanks to the documentation that Bogdan provides for further reading.

Corina, Cerner

For a year and a half I've participated in various courses held by Bogdan, from Java 8, Spring, Maven to Docker. He has a good methodology, a strong background, he keeps you interested and he is open for discussions even after the training sessions, which is very important. Usually we have more questions after we start using the knowledge from the courses.

Ion, Sociéte Générale

I have participated in several training sessions held by Bogdan, including Java 8, Maven, CI & CD, Git and Spring. Every time we were thrilled to discover the information and best practices described, especially as he exemplified them with many hands-on examples. Furthermore, there were a few things present in each session that defined Bogdan's approach, namely, professionalism, vast knowledge and experience, innovative solutions, a great personality and a sense of humor.

Lavinia, Elysian

I am the self-learning type; I usually get bored at every course/training, very quickly. With this course, it was not the case. I payed attention ~95% of the time, which is very rare for me.

Ionuț, Nokia

I was pleasantly surprised by this course, being probably much more than other courses that can be found online. The presentation is very good, the materials are well structured and prepared, with many examples. Moreover, I consider the context information to be welcome, some of it was not very "settled" for me, such as the information about the application architecture, etc. Another plus regarding the training and the trainer is the fact that I managed to pay attention approximately 99% of the time, which I find amazing.

Dorina, ANAF

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