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Sunday, September 17, 2023

Top 5 Java Multithreading and Concurrency Courses for Experienced Programmers in 2024 - Best Of Lot

If you are a Java developer and looking for some awesome resources e.g. books and courses to improve your multi-threading and concurrency skills in Java then you have come to the right place. In the past, I have shared books and tutorials on Java Concurrency and Multithreading, and in this article, I am going to talk about some of the best free and paid courses to learn multithreading and concurrency in Java. You can join these free courses to improve your understanding of Java Concurrency and Multithreading. It's one of the most important skills for Java developers as almost all the companies who interview Java developers pay particular attention to their knowledge and experience in this area.

If you are aiming for a job in big Investment banks like Citibank, Deutsche Bank, or Barclays or in service-based companies like Infosys, TCS, and Luxoft, and others, you must have a strong command of multithreading and concurrency concepts in Java.

What are Multithreading and Concurrency? Why it's important?

Executing a Java program using multiple threads is commonly known as multi-threading. This is generally done to improve the throughput and performance of your application, especially if are doing a lot of CPU intensive tasks.

Since CPU is a scarce resource but many programs leave CPU underused, by leveraging multiple threads you get an option to make full use of CPU and increase the throughput of your Java application.

When Java first came into the scene, its ability to execute programs on multiple threads got the attention. The Java Programming language has built-in support in terms of synchronized and volatile keywords for executing programs in multiple threads.

Though multithreading is not easy because when the same piece of code is executed by multiple threads, a lot of data and control-related issues happen like deadlock, livelock, race conditions, etc.

It's seriously difficult to get the concurrency right for the very first time, hence a Java developer should have a good understanding of different multi-threading and concurrency concepts before writing a multi-threaded and concurrent Java application.

These are the skills you generally learn on the job but nowadays people expect you to know before you come for an interview and that's where these Java courses and books can help you.

They provide the much-needed foundation and real-world examples to build the thread fundamentals and other multithreading concepts and terminology.

5 Best Courses to learn Java Multithreading and Concurrency in 2024

Without any further ado, here is my list of some of the best courses to learn multithreading and concurrency in Java.

The list includes both free and paid courses, as well as courses for both beginners and experienced Java programmers, so even if you have some background, you can use these courses to fill the gaps in your learning and become a master of Java Concurrency and Multithreading.

1. Java Multithreading [Free Course]

This is a free course to learn multithreading in Java and you can join it on Udemy, the biggest platform for online courses. This is a nice fundamental course which without being too much comprehensive, tells you everything you need to read and write concurrent code using Java libraries.

In this course you will learn about starting and stopping threads, basic thread synchronization using the synchronized keyword, locking, thread pools, wait and notify, callable and future, and several other concurrency utilities introduced in Java 5 e.g. CountDownLatch and Semaphores.

The course also discusses common concurrency patterns like Producer-Consumer and common multithreading problems like deadLock and how to avoid it while writing Java code.

You will also learn a bit about interrupting Threads and using Multithreading in Swing with SwingWorker. Overall, a great course to start learning Java Multithreading and best of all, it's FREE.

Btw, if you are serious about improving your concurrency skills and want to become an expert in Multithreading, Concurrency, and Parallel Programming in Java with a strong emphasis on developing high-performance applications then I also suggest you check out the Java Multithreading, Concurrency, and Performance Optimization course by Michael Pogrebinsky. It's not free but you can get in just $9.9 on crazy Udemy sales which happens every now and then.

Top 5 Java Multithreading and Concurrency Courses to learn Online - Best Of Lot

2. Multithreading and Parallel Computing in Java

This is another awesome Java Concurrency and Multithreading course from Udemy but it's not free.  Its normal price is around $200 but you can get it for just $9.99 on several of Udemy's flash sales, which is almost free.

The course is exhaustive as compared to the previous course and covers more topics and patterns with some real-life examples.

Apart from the basics of multi-threading e.g. threads, lock, synchronization, blocking, etc, you will learn about Concurrent Collections which can simplify some concurrency design patterns.

For example, it's very easy to implement the Producer-Consumer pattern using BlockingQueue class as compared to a normal Collection with the wait and notify as shown here.

This course discusses CountDownLatch, CyclicBarrier, Blocking Queue, Delay Queue, PriorityQueue, Exchanger, and concurrent maps like ConcurrentHashMap.

Apart from Producer-Consumer, this course also explains the Dining Philosopher Problem and demonstrates two simulation projects i.e. Student Library Simulation and Minor Game Simulation, which will allow you to apply the knowledge you learn.

The course also covers some advanced concepts like Parallel Algorithm, Fork-Join Frameworks, and MapReduce patterns. Overall a perfect course for an experienced Java developer to augment his knowledge on this topic.

3. Applying Concurrency and Multi-threading to Common Java Patterns [Pluralsight Course]

This is an excellent course on Multithreading and Concurrency, particularly for experienced Java developers. In this course, instructor Jose Paumard explains how to write correct multithreaded code using Java APIs.

In this course, you will learn all the threading fundamentals you will need to write production-quality multi-threaded code in Java.

You will learn about the problems of concurrent programming on multicore CPUs like deadlock, race conditions, livelock, and data corruption.

Best Java Concurrency Course

Next, you will learn how your application reads data from the main memory and CPU caches and how false sharing can cause slower performance.

Finally, you will learn about the Java Memory Model and the notion of happens-before, the most important concept from the Java program's point of view.

In short, a fantastic course to fill gaps in your Java Concurrency and Multithreading knowledge. You can join this course along with reading Java Concurrency in Practice book by Brian Goetz and the team to get the best of both worlds.

4. Efficient Java Multithreading with Executors [Udemy Course]

This is another nice course to learn advanced Java multithreading on Udemy. This course particularly focuses on the Executor framework which was introduced to Java 5 and takes away the pain and issues of creating and managing threads from the developer.

If you have worked in a multi-threaded application before then you know that creating new threads at the time of request processing can slow you down and that's why it's better to use a pool of threads to process the request.

Java solves this problem by introducing the Executor framework in JDK 1.5 which provides the infrastructure and API you need to create and manage a thread pool.

Apart from Executor Framework, you will also learn about some basics of threading like naming threads for debugging, terminating threads, and handling the uncaught exception, scheduling tasks, etc.

best Java Multithreading course for beginners

5. Java Concurrency in Practice Bundle [Best Multithreading Course]

This is the classic Java concurrency course from a Java Champion and renowned Core Java trainer, Dr. Heinz M. Kabutz.

This is one of the most comprehensive and advanced courses on Java Concurrency and a must join for experienced professionals, particularly those who are working in high-performance domains.

The course is a bundle of three main materials what is relevant to someone who wants to master concurrency:

1. Threading Essentials

2. Data Structures

3. Extreme Java - Concurrency Performance.

The Extreme Java - Concurrency Performance course is loosely based on the classic book by Brian Goetz and company - Java Concurrency in Practice, but brought up to speed for modern constructs from Java 8 and 9 like lambdas, fork-join pool, Phaser, and other advanced constructs.

best course to learn multithreading and concurrency in Java

In short, an advanced course for Java developers who are serious about Concurrency and Multithreading skills.

That's all about some of the best courses to learn Multithreading and Concurrency in Java. I have included both free and paid courses for your reference, you can choose whatever you like. Sometimes starting with a free resource is a good idea, but I would suggest the course you liked.

As you may know, multi-threading and concurrency is very useful skill and there are a lot of exciting opportunities for developers who understand this better, particularly in large investment banks.

If you are looking for your next job the time and money invested in learning Concurrency and Multithreading concepts will reap you good rewards in the future.

Other Java and Spring Articles you may like

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

P. S. - If you have just started with Java Programming or looking for some free courses to start with Java Programming, you can also check out this list of free Java Programming courses for beginners.

P. P. S. - If you want to do just one thing at this moment  I suggest go have a look at the Java Multithreading, Concurrency, and Performance Optimization course on Udemy. Watch preview lessons and start your journey to become a Java Concurrency expert. 


Unknown said...

write a program to transform input array into output array.

Input Array : 2,4,8,5,12,15,6,10,7,30,25,43,46,45,21

Output Array : 2,4,8, 12, 6, 7, 43,46,21, 5,15,10,30,25,45

Do not use duplicate or extra array.please solve this

Unknown said...

2) Let's say you are given a string. You can get many strings (combination) out of the given original string if you rearrange characters of original string.

String is Palindromable if any one combination is palindrome.

Example 1:

Original String: NINIT


Original string is Palindromable because two palindrome can be made out of Question:

Write a program to check it given string is Palindromable or not. (please note this is not a question to check if string is palindrome or not).

(Hint: Do not write a program to find the permutation and combination of original string and then check combination. Program is much simpler than finding permutation and combination.

Please solve this

Unknown said...

You have an array of length N which have some two digit numbers in it. Each number is only occurring once. You have to find out count of those numbers which have their reverse number present. Complexity of the program should be O(n) what is using one loop.

Example 1:

Input Array: 21,43,54,23,67,90,84,34,45,55,76,26,48

Output will be: 4

How: We have four pairs of number which are reverse of each other (43,34) (54,45) (76,67) (48,84)


3) Reverse each words in sentence without using library function.

e.g input: "I Love my India" output "India my Love I".
Please solve this.

Unknown said...

You forgot the excellent coursera specialization:

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