#10 - How HashMap works internally || Popular java interview question on collection (HashMap)

In this video, I have explained How HashMap works internally, what is hashing and HashCode, what is indexing and how is it calculated from Hashcode?

This is a very popular java interview question on collection (HashMap).

References taken from:
Java 8 API Doc
Oracle Java 8 Source Code
Geeks of geeks

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[soumyajit]

I have read about this from multiple resources.But I had never seen it in real 'how exactly it works'.You have explained so beautifully.Its just amazing. I would say you are "THE DRONACHARYA" (who was was royal preceptor to the Kauravas and Pandavas.)
Thank you so much for making this awesome video.Its so clear and precise.Thanks

[rd]

🙌take a bow Naveen . I searched this on internet and no one has explained it in such an easy way like you .

[Ranjan-Singh]

Thanks, Naveen for creating this whole java collection video series. In this series, you have really explained each and every collection framework topic in an awesome way and In fact, I am following a couple of automation tutors on YouTube but no one has explained these topics in such an easy and understanding way. 😊👍👍

[gita]

Excellent explanation Naveen . I was so scared to learn the collections concept in java. But you have made it like a cupcake . Thanks much for your time and effort. I don't think even the paid courses will give this much explanation for each nuke and corners.

[Fortheluvoffood]

really good explanation... learning from your channel is very much easier than reading stuff on internet and reading books... precise explanation with good examples clears the concept easily rather than getting confused in it... appreciate your efforts and your easiness towards teaching these concepts... you do it so confidently and so easily... thankyou so much...

[sharvilpatil]

This is the best explanation one can ever get on Hashing and Hashmap. Great explanation Naveen!

[gurunadhmitikela]

Wow.. what a wonderful explanation Naveen. Kudos to you for teaching this complex concept in such a simplified way. Really appreciate the hard work you would have put in to break this one brick by brick. :)

[swapnakadam]

The best explanation on How hashmap works internally, I have seen so many videos but I get confused instead of understanding but this is PERFECT....Thank you...

[sureshgarine]

I appreciate your research on Hashmap implementation under the hood, I remembered my college day's Hashing concept implementation, now I see in reality in debug mode. Thanks, Naveen. this is called bridging the gap between institution and industry. :)

[viveksinghbais]

Thank you, sir, I can't even imagine how much hard work and research are required to create such knowledgeable content. thanks so much

[abhiPn]

Thanks sir....i searched many time for working of hashmap. But Didn't satisfied with explanation all they have. But after ur video now I am cleared about hashmap. Your explanation in simple and better 🙏 thnks sir

[aryacode]

Thank you so much, sir, I can't even imagine how much hard work and research are required to create such knowledgeable content. thanks so much

[rakeshdora]

Really appreciate your work and awesome explanation i saw several videos for hashmap implementation and work flow. But this is the BEST.

[sujith]

Explanation followed by the important notes was very helpful. Really appreciate this Quality content.

[lockdowndiaries]

super. simple and clear explanation. i have searched many videos. nothing compared to urs. great and thank you so much for helping us out

[mahiradolan]

Very detailed and excellent explanation. Thank you, Naveen!

[sakshiaggarwal]

Thanks a lot Naveen. This was much needed to understand the internal working. 😇 Especially the debugging how it is calculating the hashcode is ultimate.

[muzammilkhan]

Thankyou Naveen Sir for your explanation! After banging my head for hours, and reading articles, finally found your video and understood how it works.

[prabhakarreddy]

Entire YouTube ur explanation is just awesome

[sachida]

Explanation is precise and crisp and well documented thanks for this post.