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Summary

The provided web content lists eight top-rated online courses for experienced Java developers to learn about lambda expressions, stream API, and functional programming in Java, focusing on Java 8 and later features.

Abstract

The article presents a curated selection of the best online courses available in 2023 for Java developers who wish to master functional programming concepts introduced in Java 8, such as lambda expressions, streams, and functional interfaces. It emphasizes the importance of these features in writing cleaner, more readable, and maintainable code. The courses are designed to help developers understand and apply functional programming patterns using practical examples and exercises, with some courses also covering enhancements from Java 9. The list includes courses from reputable platforms like Udemy, Pluralsight, and Educative, catering to both experienced programmers looking to upgrade their skills and those new to functional programming in Java.

Opinions

  • The author believes that Java 8's introduction of functional programming concepts has significantly improved the way Java code is written.
  • Functional programming in Java is seen as a means to express code intent better, leading to easier-to-read and maintain codebases.
  • The article suggests that understanding functional programming is crucial for writing high-performance Java applications.
  • It is implied that while functional programming can be complex, these courses can make the learning process more accessible and enjoyable.
  • The author highlights the importance of hands-on practice and recommends courses that include puzzles, exercises, and coding examples using tools like JShell and IDEs such as Eclipse and IntelliJ IDEA.
  • The courses are recommended not just for their educational value but also for their instructors, with several courses taught by Java Champions and industry experts.
  • It is suggested that even developers not specifically focused on functional programming can benefit from the useful tips and tricks provided by these courses to improve their Java code.
  • The author encourages readers to share the course recommendations with their peers and invites feedback on the article's content.
  • For beginners in Java programming, the author advises starting with more fundamental courses before diving into functional programming.

8 Best Lambdas, Stream, and Functional Programming Courses for Java Developers in 2023

My favorite online courses to learn Lambda Expressions, Stream API, and Functional Programming in Java in 2023 from Udemy, Pluralsight, and Educative.

image_credit — Pluralsight

Hello guys, if you remember, Java 8 changed the way we usually code in Java by introducing some Functional Programming concepts. It brings features like lambda expressions and Streams, which give birth to new patterns that result in clean code in Java.

Now there is a better and more declarative way to write Java. If you use them correctly, they can express the intent of code better and thus makes it easier to read and maintain.

Another bit that many people miss is the introduction of Functional programming concepts like the map, reduce, flatmap, and filter, which enable us to write more readable code in Java. If you know functional programming or want to learn functional programming in Java, you have come to the right place. This article will share some excellent courses to learn functional programming in Java. These courses will help you to master Functional Programming and write unique Java code using Streams, Lambda Expressions, Functional Interfaces, and method references. You will also learn and understand things like map, reduce, fil, filter, and other functional programming patterns, why they were added in Stream API and how to use them properly to write high-performance Java applications. These courses are for experienced Java developers, someone who knows how to write a Java program and has worked on Java for some time.

If you are a complete beginner in the Java world, it’s better to start with something more fundamental like The Complete Java Masterclass, which covers everything a Java developer needs to know, including some functional programming basics.

Top 8 Java Functional Programming Online Courses to Learn Lambda Expression and Stream API in 2023

Functional Programming was introduced into Java in Java 8. Additional Functional Programming Enhancements were added in Java 9, and this list provides courses that cover all those functional programming features. Without wasting any more of your time, here are the best courses to learn functional programming in Java:

1. Learn Java Functional Programming with Lambdas & Streams

This is probably the best Udemy course to start with Functional Programming in Java. In this hands-on course, we will learn to write some excellent Java code with Functional Programming. You will not only learn the basics of Java Functional Programming and things like Lambda Expressions, Method References, Streams, and Functional Interfaces but also practice these concepts by solving puzzles, exercises, and writing programs using JShell.

This course also uses Eclipse (Java IDE), and if you are new to Java, then don’t worry; you will learn how to set it up. If you are new to Functional Programming, it's the best course to start with. Created by Ranga Rao of In28Minutes Official, a fellow Java developer and Udemy best seller instructor, this is the best course for beginners to learn functional programming. Talking about social proof, more than 16K students have already enrolled in this course.

Here is the link to join this course — Learn Java Functional Programming with Lambdas & Streams.

2. From Collections to Streams in Java 8 Using Lambda Expressions

This is another beautiful course to learn functional programming in Java. This course will show you the new patterns introduced in Java 8, which uses lambda expressions, the functional interfaces, the Collection Framework, and the Stream API for producing cleaner Java code. Created by Java Champion José Paumard, this course mainly focuses on o lambda expressions, one of the most important concepts introduced in Java 8. Lambdas are a nice thing but would be useless without new patterns to process data. You will learn about things like map, flatMap, reduce, and filter, which will help you to work better and efficiently with bulk data in Java and create better patterns and code.

Here is the link to join this course — From Collections to Streams in Java 8

3. Implementing Design Patterns Using Java 8 Lambda

If you have been writing code using Modern Java syntax, then you may have wondered how to implement classical design patterns like Strategy and State using modern Java features like Lambdas and Stream. This course will teach you how to implement those design patterns using modern Java features. It will help you to write fluent and straightforward code, which is easier to read and maintain. If you don’t know Jose, the instructor of this course is a Java Champion and regarded as a Java expert. This course, along with the other two I have included in this list, gives you a fantastic opportunity to learn from the expert himself.

Here is the link to join this course — Implementing Design Patterns Using Java 8 Lambda

4. Streams, Collectors, and Optionals for Data Processing in Java 8

This is another advanced course by Jose Paumard on Pluralsight on Functional Programming and Java 8. This course will teach you advanced patterns to process bulk data in Java 8 using lambdas, streams, spliterators, options, and collectors. You will learn things like how to build your own spliterators to connect streams to non-standard data sources and to develop your own collectors. You will also learn how to inter-operate between new Stream and old Collection classes like ArrayList, Iterator, and others. You will also learn about Optional, a new concept introduced in Java 8 to handle the reduction of empty streams and often regarded as saviors from Nulls. Overall an excellent course to learn new patterns for processing data in Java 8 using Stream, Optional, and Collectors.

Here is the link to join this course — Streams, Collectors, and Optionals for Data Processing in Java 8

5. Java Streams API Developer Guide

This is another hands-on course to learn and master Stream class and their class from Java .util. Stream package. Instructor Nelson Djalo has done an excellent job in explaining confusing Functional programming concepts and methods like map, reduce, filter, and flatmap with some live coding examples. He will first show you the code and then explains the code. At the same time, he will also show you how you can change the code to change the behavior, which helps you to learn those Stream methods better. Along the way, you will also learn some useful keyboard shortcuts and productivity tips to work with IntelliJIDEA, the most popular IDE for Java development.

Here is the link to join this best Java Stream course — Java Streams API Developer Guide

6. Java 8 for Experienced Developers: Lambdas, Stream API & Beyond

This is an intermediate Java course from Educative to learn all the functionality of Java 8 and be ready to utilize these new features in your code.

In this course, you will learn about lambdas, Java Stream API, Functional Interfaces, and lots of other new improvements related to Collections, Memory Management, Date & Time API.

Created by SAURAV AGGARWAL, this course will help you learn useful Java 8 concepts that can help in your day-to-day coding and make you a better Java developer. After completing this course, you’ll be well versed in all the functionality of Java 8 and be ready to utilize these new features in your code.

Here is the link to join this course — Java 8 for Experienced Developers: Lambdas, Stream API & Beyond

And, if you like the Educative platform and their interactive courses, particularly Grokking courses, you can also get an Educative Subscription that provides access to not just this course but their 100+ courses in just $18 per month. It’s very cost-effective and great for getting some hands-on learning experience.

7. Modern Java — Learn Java 8 features by coding it

It’s been many years since Java 8 was introduced, but there are still developers who are afraid to learn Lambdas, Streams, new Date APIs, Optionals, and Parallel programming in Java 8, and you can not learn it unless you start coding them. If you are afraid of functional programming in Java, then this course is for you. This course will teach all the new Java 8 Features by coding them like lambdas and stream. If you want to learn all the new features such as Lambdas, Streams, Optionals, Functional Interfaces, and Parallel Programming in a guided and coding full way then this course is for you.

Here is the link to join this course — Modern Java — Learn Java 8 features by coding it

8. Refactoring to Java 8 Streams and Lambdas Online Self-Study Workshop

This is another intermediate-level course to learn Java 8 and Stream API and write better code in Java. This course is created by Java Champion Dr. Heinz M. Kabutz, and it's full of practical advice.

Unlike other courses, in this course, you will refactor existing Java code using Stream, Labamds, and new functional programming concepts like a map, reduce, flatMap, filter, etc.

Here is the link to join this course — Refactoring to Java 8 Streams and Lambdas

That’s all about the best courses to learn Functional Programming in Java. These will explain fundamental functional programming concepts like immutability and transformation like the map, flatmap, reduce, and others. Even if you are not looking for functional programming, you will learn many useful tips and tricks to write better Java code.

Other Java Programming Articles you may like

Thanks for reading this article so far. If you like these Java Functional programming courses, please share them with your friends and colleagues. If you have any questions or feedback, then please drop a note.

P. S. — If you are new to the Java Programming world and looking for some free courses to start your Java programming journey, you can also check out this list of my favorite free Java courses for beginners. It contains some of the best free Java courses from Udemy, Coursera, Pluralsight, and Educative for beginners.

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