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Who Is This Course For?

Please introduce yourself to functional programming and its benefits—this lesson discusses the prerequisites, topics this course will cover, and GitHub repository links.

Gopi Gorantala
Gopi Gorantala
2 min read

Table of Contents

This course deep-dives into each of the functional programming concepts that got introduced in the Java programming language.

Introduce yourself to the functional programming

Functional programming has recently gained popularity, and the number of lines written by developers in the last few years using functional programming(for open-source projects) did hustle around Java developers.

  1. No wonder developers fell in love with functional programming with fewer lines of code.
  2. The Java community encourages more and more developers to embrace this programming style.
  3. In this course, you will learn how to write functional programming code with lambda expressions and Streams API, etc. 4. Having a detailed knowledge of this topic will help you write clean and single-line Java code snippets for most business use cases.
  4. Functional programming provides high performance in processing extensive data for applications.

This course benefits all Java developers who want to get strong with modern Java 8/11/17 features. Wait, there’s much more we will discuss in this course.


To take full advantage of this course, you should ideally have the following:

  • Knowledge of Java basics.
  • Create and run a simple Java program.
  • Collections API (optional)

Install Java 8 or above versions if you wish to run the example code snippets locally in your IDE(Integrated Development Environment).

Free IDE

I use IntelliJ Idea, WebStorm, and Datagrip in my everyday use at work and personally. Apart from its basic tooling tasks, it offers even more advanced features. No IDE comes closer to JetBrains IDE’s.

IntelliJ Idea is the number one choice, per the survey conducted by open Java communities and the Java official channel.

For instance, I was asked to only use IntelliJ Idea when I worked for Apple, Jive SBS, a startup and European Commission companies.

Please take full advantage of Jetbrain tools for what it offers in the community and the ultimate edition.

JetBrains is free for students and teachers: Get free access to all JetBrains IDEs for personal use at school or home..

What will you learn in this course?

This course elaborates on the following topics in detail with real-time examples.

  1. What are lambda expressions? How to write them with examples.
  2. Interface types, use of them?
  3. What are functional interfaces, more about the Function package?
  4. Built-in functional interfaces with examples.
  5. Method References.
  6. Streams API.
  • Transformations
  • Aggregate functions
  • Sorting objects
  • Handle duplicates
  • min and max, etc.

The most rewarding outcome of this course

The most rewarding outcome of this course is that you will learn

  1. What are the most common ways to solve problems using Java functions and streams API with real-world business use-case examples?
  2. Hands-on practical examples
  1. Questions/Quiz that tests your knowledge of each chapter.

🤩 Happy coding!!


Gopi Gorantala Twitter

Gopi is a highly experienced Full Stack developer with a deep understanding of Java, Microservices, and React. He worked in India & Europe for startups, the EU government, and tech giants.


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