Java 8 Streams | map () & flatMap() Example | JavaTechie 

Thanks for making it look so simple. Key take away: If the parameter in the stream returns a Scalar(eg: customer.getEmail() single email id) then use Map. If the parameter returns a Vector(eg: customer.getPhoneNumbers(), customer.getProductsOrdered() which returns a list) then use FlatMap. Stream of Stream for FlatMap is one more key point to note...

I watched multiple videos on this topic. But you are really very nice in explaining the things deeply with clear and right example. Thanks brother

SIMPLY and PPRECISLY explained!! Big Love for your Time, Effort and Diligences!!

Thanks, man, your explanation is short and sweet without wasting time.

I was unable to understand flatMap() until this video. Thank you so much Sir, your videos truly helps.

Excellent explanation in a very systematic way with good clear example.. Thank you

This is a great tutorial, and it really helped clarify things for me! One minor issue: I'm pretty sure the term is "Data Flattening" not "Data Flattering" (though to be fair, data is not complemented nearly enough!)

All doubts got cleared for differences between map and flatMap operations of stream API. Thanks

You do it very well! Great explainations!! After this, all I understood is that decreasing object levels with flatmap to one level, gives a map!

Great, simple and easy explaining the stream👍🏾

For the first time i clearly understood flatmap(). Thanks a lot.

Every weekend I like to watch ur new videos keep posting

Very good explanation 😊

Please rename the word "flattering" to "flattening" . "Flattering" means to praise a lot,- lot of thumbs up for this video is flattering. Flattening is to reduce dimensions that flatMap does. Thanks

One of the best youtube channel I have come across. Love your explanations.

The code example is quite comprehensive and useful. Great thanks!

I have seen lots of videos but didn't understand but after see your video I understand very well thanks bro and God bless you 🙏

Thanks a lot! 15 minutes and I got it very clear.

Very clearly explained, this is what I was looking for. Thanks 👍

Great video. Hope to see all other Java8 related videos soon. 🙃😊

Provided knowledge with simple example.

Thanks bro, today I clearly understood when to use these concepts😊👍

straight forward stunning explanation got concept easily.

Thanks for the wonderful Explanation! Clear shot

i love this good example to illustrate the difference b/w map and flatmap() keep it up bro

Sir ur explanation is very simple and understanding every time.. Please keep doing it 🙏👏👏

There's already SO many comments like this on this video, but I have to commend your ability to simply and clearly explain the topic. Showing an example that can implement both methods and even using the map on something you wanted to flatMap() to illustrate the need for the flatMap() method--such a good illustration. Sure you said flattering instead of flattening but that is such a miniscule detail. Your comments in your code were fantastic too as it made your verbal explanations even more clear. Much appreciated for this content, you just got a new subscriber!

Simple & Precise.. keep it up

Awesome+Simple explanation!! Thanks a ton ❤️

Superb 👌 explanation ✌️

So concise and too the point.... Thanks a lot

Really awesome 👍 please create more videos on java 8. Such real time experience.

Thank you, sir - really good that you provide code for reference ...

Excellent, finally understood. Thanks a TON.

Thank you , Its was really crystal clear explanation .

Thank you java tech guru, helping lot to understand the key concepts Jai hind

Good. I read so many times flatMap is map+flattering, but didnt really understand what flattering is. Thanks

Very good information, thank you very much

very nicely explained . Great work !!

Thanks for making it look so simple.

Superb tutorial

Thanks u told in very simpler way easily understood 😀

Thanks Java Techie 🙏🙏

Helpful, thanks for the video.

Awesome video sir ji

Thanks for your wonderful explanation!!

What an explanation sir .. hats off

Great tutorial bro...👌👌👍👍 Keep posting new tutorial ...😀😀😀😀

Nice and short explanation to the point

beautiful explanation. thankyou.

Excellent explanation 🔥🔥

Nice Explanation.

You have got a new subscriber. That's all I can say. Great learning for me. 😊👍

Thanks for the video. One to One and One to Many explanation was really really great.

Excellent explanation 👌

Nice explanation

Thanks for the nice explanation.

Thanks for clearing the point

Amazing video: Few Highlights : 1. Use map function when we can map one-to-one mapping, whereas flatmap is used for one to many mapping. 2. map provides mapping for single input, single value whereas flatmap provides mapping single input multiple values 3. flat map performs data transformation+flattening(flattening is the process of converting multiple lists of lists in stream to a single list by merging the values)

Commendable job

GREAT EXPLAINATION ....Thanks SIR

Great job. One note, for those of use that our OCD kicks in easily it will not be easy to watch the code comments being 2 tabs behind the rest of the code (6:32)

very good explanation. I understood at one time

Thanks sir...this topic is very helpful for interview purpose

Thank you Sir. Nicely explained.

good one basant, wishing you more success with the channel

You are my favorite techie bro!

Good concept.

Very well explained thanks 👍👍

This si the real TeachingTalent Instructor

Great explanation!

Thank you sir. Very informative.

Well explained. Thank u so much

Very clear explanation

Thanks a lot for your efforts and putting this video.

Nice video

Awesome 🙂

A clear explanation

thanks basant short and crisp!

Way of explanation is very good

Good tutorial. Thank you.

U r great bro, 👍

Excellent explanation bro.....

Always learning new concepts from here. Thank you. I am expecting an example of large project consist of multiple modules and one for authentication and authorisation.

How come I missed so useful channel.

bhai best tutorial i have ever seen...love you.

hi sir, hats of to you..... Thank you very much. very nice explanation. I read multiple article about map Vs flatMap, I could not understand but after watching your video I am very clear now. I can answer to interviewer very comfortably after watching this video.

Nice explanation!

Good video 👍🏻

Simple and clear explanation thank you

Thank you sir, You are Awsommmmmmmmm....

Well explained!! Very nice video!!!!!

Thanks..expecting more tutorials on java 8 + features. I would really appreciate if you would take a competitive programming challenge and show us how to use java 8 + features to solve it.

Crystal clear explanation. Thanks for such a nice content.

Very clear explanation 🔥👌🏻

Excellent!! bro

Nice explanation. thanks!

Thanks for this

good explanation! Thank you!

Super