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Functional Programming with Streams in Java 9

$94.99 $12.00

4.88 (12 reviews)


What you’ll learn

  • Understanding the principles of functional programming and how they contribute to safe parallelism
  • Understanding the new features of Java interfaces, including the notion of functional interface
  • Using lambda expressions and functional interfaces, as a lean alternative to anonymous classes
  • Using streams to perform computations on sequences of data
  • Using streams to seamlessly perform parallel computations with the Java 9 SDK

Java 8 introduced a wealth of new features, pushing Java towards the
so-called functional programming paradigm. Benefits from this shift
include succinctness and ease of developing robust multi-threaded

In this course, we will introduce the key functional
features of Java 8 and 9, and explain how they can be used to write
code that is more expressive and easily amenable to parallelization.

we will first discuss lambda functions and functional interfaces. Using
these features, programmers can easily create objects that offer a
single specific service, similarly to anonymous classes. We will also
explore the predefined functional interfaces that can be found in the
Java API, starting from well-known pre-existing ones like Comparator and

Reaping the full benefits of lambda functions requires
employing them with streams, a new kind of collection with built-in
parallelization support. We will examine the relationship between
streams and collections, and how the latter have changed as a result of
the new language features.

Finally, after having mastered the key
features of streams, we will consider the details related to parallel
execution, such as the crucial notion of side-effect and the fork-join
execution model.

About the Author :

Marco Faella is a professor of Computer Science at the
University of Naples “Federico II”, Italy. He has taught classes on Java
programming, compiler construction, and software engineering to
undergraduate and graduate students since 2005. He is the author of over
50 scientific publications in international conferences and journals.
He has also developed scientific software in C++, OCaml, Python, and

Marco is fluent in C, C++, OCaml, Python, and Java and has
contributed to the Parma Polyhedra Library, a well-known scientific
library for symbolic manipulation of polyhedra.

He has an extensive teaching experience in related topics,
specifically a course on advanced Java programming with generics,
collections, and multi-threading, which he has been teaching for the
last 10 years (Linguaggi di Programmazione 2). He’s also writing 4
chapters of an upcoming book (in Italian) on Oracle OCP Java

Who this course is for:

  • This course is intended for all Java programmers who want to take full advantage of the new functional features of Java, including the opportunity to easily parallelize performance-critical sections of code.
  • Experienced programmers and senior engineers who have already been exposed to the functional paradigm will also benefit from the course, by quickly picking up the Java way to blend object-oriented and functional programming.
  • To follow the course at full speed, the audience is supposed to be familiar with most Java 5 features, including generics and multi-threading, and with the basic interfaces and classes from the Java Collection Framework, namely lists, sets, and iterators.
  • Upon completion, viewers will be able to employ the functional features of Java 9 to write code that is clearer, more efficient and easier to maintain.

Course content

  • Introducing Functional Programming
  • Lambda Expressions
  • Functional Interfaces
  • Sequential Data Processing with Streams
  • Stream Operations
  • Parallel Streams
  • Functional Exercise

12 reviews for Functional Programming with Streams in Java 9

  1. Luis Brito

    I can definitely see this course helping breaking through that initial barrier when it comes to learning a programming language. I’m positive I’ll finish it and hopefully master python by then.

  2. Abdallah Galal Abouhussein

    I would like to share my personnel experience, i`m very pleased and happy for taking this impressive course because Dr. Angela always makes it simple and easy to understand and always makes a precaution section before or after any bug that may appear to some students and also write or record the solution for us, and each word she said is very real and easy to understand.
    Thanks Dr. Angela
    Abdallah Galal

  3. Jiaqing Fan

    Very good course. Dr Angela explains things very clearly. The exercises are interactive and helpful.

    Angela’s voice is like ASMR in most lessons. So you won’t lose focus?

  4. Jaime Sánchez Blanco

    Every concept is very well explained so you can assimilate it, and the teacher insists in practicing daily to get the habit of programming. It really motivates to keep studying and practicing every day.

  5. Bradley Carouthers

    3 days in and I’ve already learned more than other training programs where I’ve put months in. Her teaching style is both efficient and effective.

    Edit: Now on day 29 and the course has held up my expectations and hopes. The rise in complexity is not too sharp, and every day feels like an accomplishment. Angela takes her time to explain things without rushing, yet is able to pack tons of information in nuggets of time.

    Still recommend supplemental exposure for a more wholesome grasp. Though, this should be quite enough

  6. Tommy Prévost

    Very good course.

    PROs: lots of coding exercises, clear explanations, great examples, adapted to 2021’s reality.

    CONs: past the first 30 lessons, many similar coding hands-on.

  7. Quang Tu

    I love all the lectures and challenges of this course. I finally find myself in love with coding. This is definitely a fun course. Thank you Angela for this great course.

  8. Fortunate Eze

    This course is nothing short of AMAZING. The level of love and sincere desire to see students succeed present in this course is a rare sight. This course is fun, it’s challenging, it’s suspense-filled, it makes you feel good about yourself solving those challenges. You don’t take this course and memorise codes, you take it and you know what you’re doing because you literally do it yourself.

    It couldn’t possibly be any more obvious that Angela brought out her whole heart, time, energy and resources to give us a course that if priced based on it’s value, many of us certainly can’t afford. I mean, she kept advising and encouraging us to keep going, because she knows the road could get bumpy, she made a few jokes and used funny animations so we smile along the way keeping it fun. Why some people can’t see this and would rather subscribe to trying to bend courses to fit their own personal preferences is beyond me, but I guess people will always be people.

    Dear Angela, I cannot speak for everyone but I certainly can speak for myself and I’m saying thank you. The efforts you put into making this course outstanding didn’t go unnoticed.

    Let as many of us as appreciate your efforts make you happy and energize you to create more life changing courses for us.


  9. Chendaniel

    Just the course fits me. Learn by doing, it is easy to start and just follow the flow and at day 15 you realized how to program in Python. Then the magic happen. I am on day 27 and I am looking forward to start a new section everyday.

  10. Caspar Cheng

    Angela is my favourite teacher on Udemy, her courses always come with clear and concise demonstration, make it really easy to understand the content. Meanwhile, she also provide a lot of tips to encourage us moving further on the way of coding. I’m definitely a super fan of her. I had finished her web development boot camp and now I’m learning Python 100 days of code. This course is amazing as she provided one particular project for each day’s learning, which is, really useful and handy. Also, those projects are really interesting and won’t let me feel disappointed about myself. Although some of them are a little bit difficult, they’re still resolvable after some struggling and searching online. I’ll recommend this course for those who really want to learn Python well and write real python projects from scratch!

  11. Jonas Weber

    The course was awesome in the first half! Really helped me to get back to programming and learning new techniques. Also the course got way to much focused on web development in the second half, which I’m not really interested in and is redundand to your dedicated web development course. The lack of videos in the last quarter was rather sad. I really would’ve liked some video explanations for pandas and matplotlib. The challenges and capstone projects were great and challenging!
    All in all I can really recommend this course for beginners and those who want to learn python and/or get back to programming!

  12. Rohit Prasad

    Angela is the best teacher I have ever experienced. The way she explains all the topics and makes use of it in the projects is commendable. Thank you so much Angela for this course.

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