Parallel streams in java 8 -In depth Tech Walkthrough | Java parallelism Vs Multithreading

In this video we will learn about the Parallel streams in java which is introduced in java 8. Parallel Stream can be used to achieve faster data processing. While processing data in a sequential stream , only main thread is involved in processing the data.

Activating parallel data processing in a java stream is quite easy. We just need to call the parallel() method over a stream and we are all set. The parallel stream behind the scene uses the Java's fork and join framework to split your data stream into sub tasks. The chunks of data then processed by all of your cpu cores , in parallel.

Considering a 4 core cpu, 4 threads can , at a time process the entire data stream and complete the data processing much faster then a sequential stream.

We will learn about the parallel stream in depth in this video and also we will see how it is different then multi threading.

Timestamp
--------------------
00:00:00 - Parallel Stream in Java 8 - Intro
00:04:00 - Single core CPU and threading
00:07:48 - parallelism Vs Multithreading
00:07:28 - Multi core CPU and Parallel Programming
00:10:04 - Parallel Stream - How it works ?
00:19:09 - Parallel Stream - Performance Test (coding)
00:26:45 - Fork and Join Framework in Action
00:44:48 - Sequential Stream vs Parallel Stream
00:54:52 - how to test a stream pipeline parallelism ?
00:58:12 - forEach() vs forEachOrdered()
01:07:14 - Thread Safety in Parallel Stream
01:10:25 - iterate method in stream api
01:20:20 - Inconsistent output in parallel stream - Solution
01:30:19 - When to use parallel Stream ?
01:42:28 - reduce() with parallel stream
02:02:24 - How collect() method works internally ?
02:17:31 - takeWhile() in parallel stream
02:23:03 - Bonus Reference: How java stream works ?

#javastreams #streamapi #javaprogramming #javatutorial

Parallel stream in java is a very important interview question for any java interview, so make sure to do some hands on this topic to get ready for your next java interview.

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[failurejohnwick]

I watched all your spring framework play lists like Hibernate, MVC, Security, JDBC and it is really helpful for me and I am watching this video and this video clears my concept related to the stream API. Thanks 👊

[rahulbhatanagar]

Really waited from long for this video. Thank you so much for posting 👍

[sarath]

Waiting for the parallel stream videos, thanks.

[ashutoshgupta]

1:29:50 forEachOrdered will give consistent results as it maintains the order of the data source

[yatendra__singh]

Wonderful video sir ❤you are the best 🙏🏻🙏🏻

[rohitgavande]

Thank you abhilash been waiting for this

[rahulbhatanagar]

Wonder video content 😍. Love your way of explanation 😊.

[Srikanthb]

Hi abhi...i love the way you explain and the music beyond.

[teklehaimanotatikilt]

thanks abi please upload more videos on spring security?

[srikanthbathula]

Thanks for the video Abhilash, could you please make a video on Java 8 hashmap and JVM memory enhancements

[rahulbhatanagar]

at timestamp 1:29:45 if we are using forEachOrdered I think the list will still be inconsistent because the job of this forEachOrdered method is to order the elements which are already there in the parallel stream. That's all I think I may be wrong as well.