01. Internal Working of HashMap & Java-8 Enhancement

#java #interviewquestions #webencyclop
In this playlist I will try to cover all the important java interview questions along with answers in very intuitive, kind of pictorial/animated way.
Complete Playlist:
• Java Developer Intervi...
Next Video:
• 02. Equals and HashCod...
Video includes:
- 00:16 What is internal memory structure of HashMap?
- 04:09 How HashMap "Map.put()" method works?
- 06:41 What is a Hash Collision?
- 08:37 What is the use of Object.equals() method in HashMap.
- 09:03 Summary of internal working of Map.put() method in HashMap.
- 10:35 How to search element in LinkedList
- 12:03 How HashMap "Map.get()" method internally works.
- 14:30 Why we need enhancement in Java 8 HashMap, what was the problem before?
- 15:03 Java 8 enhancement in HashMap, (storing elements from LinkedList into Tree structure)
- 15:15 What is treefy threshold in HashMap ?
- 18:08 What is red-black Tree in HashMap. Binary Search Tree or Self Balancing Tree.
In this series we will be covering all Java interview questions and answers. This is going to be comprehensive list of Java interview questions which can help experienced Java developers to prepare for an interview as well as upskilling the Java knowledge.
I would always recommend everyone to watch Durga Sir (durgasoft) videos because of extensive in depth explaination on all topics if you have more time.
But here we will try to cover important aspects of Java Programming which are always asked in interviews withing less time.
We will be covering below topics in the video.
1. Hashmap Interview Questions
2. Hashmap Java 8
3. Hashmap Java Coding interviews
4. Hashmap in Java by Durga
5. Hashmap Java Interview Questions
6. HashMap internal working
7. equals-hashcode
8. get method
9. hashmap in java
10. internal-working-hashmap
11. interview-questions
12. java 8
13. java tutorial
14. java-8-nehancement
15. put method
16. job interview questions and answers
17. behavioral interview questions and answers
18. job interview tips
19. Interview questions and answers
20. Animated java
21. java animation
22. java programming tutorial
23. Hashmap java 8
24. learn java
25. java tutorial for beginners
26. Hashmap enhancements in Java 8

[@evgenii550]

you said that the capacity will be increased if 12 buckets will be full (for initial capacity = 16), but if i try to use class, which hashCode() always returns 1, as a key, then all the new pairs will be stored in one bucket with index 1 and according to debugging the capacity will still be increased. doesn't this mean that the load factor depends on the number of pairs in the hash map? not on the number of buckets with pairs

[@webencyclop]

ah good catch, let me pin 📌 this post. thanks for your comment.

[@cyberulitka4661]

thank you for your comment! good point!

[@ukj6795]

nice observation, thanks for sharing this

[@dhanashreekamali3185]

Is loadfactor depending on number of entries in Hashmap? @webencyclop (if not what is the meaning of pairs here? what does this pair signify?)

[@pratikbhange2757]

​@@dhanashreekamali3185key and value😊

[@aniketbharsakale2561]

Your pictorial representations, the images & the color that's choosen for slides, the way you have explained it so neatly, its commendable. You have simplified a tough concept and making complex things look simple is an art. Great job. Good going!

[@webencyclop]

Thanks a lot for praise & motivation!

[@saikumartalluri8476]

@@webencyclop Please upload more videos ... Very much helpful. Thanks.

[@rekhaagroya1982]

Agree.

[@yogeshpawarvlogs527]

The way he represents the data is phenomenal... Thums up for his presentation. 👍👍👍

[@snehasavane9141]

very neatly explained basics of working of hashmap,linkedlist,tree

[@pratikjagadale3216]

Tried a lot on the internet to understand hashmap working ... finally brother understood from your video👍👍👍

[@imanidesireejones9684]

wow so easy to understand. I like how you actually explain certain keywords instead of grazing over concepts. this was so helpful thank you!

[@maheshchennamsetti549]

I have seen many videos but I am wasn't satisfied with any of them .After seeing this video I got an absolute clarity thanks to this man for explaining in such a detailed way.

[@AzeriFire]

I have never seen such detailed tutorial about the hashmap! I want to thank you, even I knew how it works.

[@Veronica-vq5iz]

Wow, you explained it so well, I have watched so many tutorials for this concept and never had this deep understanding. Thank u so much.

[@manishpatidar5379]

Picturial representation makes this videos excellent... It will be easy to remember the flow chart

[@nitincareer9190]

Excellent video on Hashmap so far, keep doing more like this.

[@mohammadsadeghi2353]

You are awesome at explaining complex topics. Thank you.

[@ahir_shubham]

Beautiful explanation with specially the images...felt very comfortable to understand...Keep going...Thankyou!

[@kusumbhatt2168]

You explained this concept in detail, this is very helpful... thank you!!

[@PrivateMovie]

🎯 Key Takeaways for quick navigation: 00:00 *Interview question introduction* 00:13 *Creating new jobs* 01:10 *Subscribe for updates* 02:22 *Journey components* 03:49 *Multiple nodes concept* 05:09 *Hash code importance* 06:47 *Calculating values* 08:51 *Node equality check* 10:35 *Item searching process* 12:29 *Time complexity overview* 14:13 *Notification system* 15:11 *Tree conversion process* 16:04 *Web content benefits* 16:28 *Tree structure benefits* 16:52 *Search optimization method* 17:23 *String comparison methods* 17:58 *Red-black tree definition* 18:11 *Binary search tree* 18:29 *Tree conversion process* 18:49 *Future interview questions* Made with HARPA AI

[@gudesreekanth6373]

Best explanation so far in youtube on hashmap internal working... Nice buddy!! Appreciate your effort ...

[@shilpakothre4893]

Thank u for explaining in such a wonderful way. Before watching this video I have lot of confusion in this topic. This clear my all doubts.

[@lavanyapadma3024]

Best Explanation ever…have seen so many videos but this is the best, Thank you 🙏

[@kumarprakash93]

Appreciated the way you explained the concept. Thank you.

[@parambharti7095]

Great explanations. Thanks !! Please keep making more videos. Nice way of teaching.

[@dhananajaykrishna8259]

Best video on working of Hashmap . Also the treeify threshold concept is well explained. Thank you!!

[@ganeshkulkarni9648]

Wow, what a prefect explanation it was. Thanks a lot man for this smooth explanation, We're looking forward for many videos, but you have stopped posting it.

[@resh9906]

Best explanation for hashmap. Thanks!

[@AkhileshKumar-li6me]

Kindly note that when hashmap is passed the duplicate key, it calls the hashCode() method to generate the hash value for the key and this hash value helps in determining where to put this new entry but since this index/position already has one entry. Since each bucket stores the entry/ies in the form of a linked list so new entry will be added at the top/right end of the linked list. The same logic will be applied if another duplicate key arrives. Please note, when we try to retrieve the value by passing the key(which is duplicate in nature), hashmap goes to the appropriate index by calculating the hash value and traverses the linked list, and returns the most recent value as all the keys are same.

[@vigneshv5092]

Well documented video. Thanks

[@sandeep_khangar]

Bro, one of the best video I've seen. Proper explanation , diagram. 🔥

[@VishalRaj-wu8il]

best video on HashMap internal working and loved your content.thank you for such great content.😊

[@a_r_c_h_a_n_a]

Till now i have seen so many videos about the HashMap collision, this is one which explains every thing without any chance of doubt. Great great Job..........!!!🤩

[@webencyclop]

thank you..

[@sweetGemini31]

Very easy to understand! Great job!

[@shrutithanekar3464]

Thank you so much for this video I was actually able to visualise internal structure of the hashmap

[@illinoska]

Very easy to understand. Thank you!

[@aniruddhachunne3011]

Superb.... you are the best.... god bless you

[@monikapreethi4847]

thankyou so much. its really excellent explanation with neat slides, think your the best tutor to explain the concept in a simplified manner. I think its the best video on hash map .

[@yatinbatra6124]

Amazing explanation. Thanks. Please prepare some more videos.

[@kartikbadnorejain4708]

Super Awesome. This is what I was looking for.

[@shyamvittal]

One word... "AWESOME"

[@deeptichaudhary1610]

Very nice explanation.Thank you

[@user-lr7cg3yk7p]

Great session, neat and good explanation. Thank you

[@randhirverma8042]

Thanks, man thanks a lot finally my concept is cleared, One of the best explanation I got on youtube

[@AyushmaanPandey]

Very precise explanation.Thanks a lot

[@SouravChatterjeeboss]

Best tutorial I have ever seen. Thank you.

[@jitesh1480]

V good explanation, simple and on point. Thanks and Keep making more videos like this!

[@anilmaurya55]

Sir your teaching is so good and simple and so effective...

[@nandanpatil299]

Best Representation, Really helpful, request to you please create video on "Internal working of HashSet"...

[@aayushiyadav7914]

Thank you for the explanation. It's really helpful.

[@desiengineerashish4908]

Thanks man! You made it far easy...

[@deeptimonga7375]

Excellent content & presentation. Eagerly waiting for the new videos. Please keep up the good work!!!

[@scrppr8270]

Please Upload more videos.....your explanation is just awesome👌👌👌😍

[@abhinavdogra3835]

Extraordinary explanation pls make more videos in this playlist

[@ukj6795]

amazing explanation, thank you

[@Itsarpitgupta]

Thanks for the wonderful explanation.

[@jamshadm]

Explained very well. Thank you :)

[@mit1696]

Awesome Explanation

[@nvs4600]

Thanks so much. It's very helpful for me.

[@tunghoang9373]

Thanks from a user from Viet Nam Your explanation was so easy to understand although it's hard to understand your english as much :)

[@haihellonamastey]

crystal clear explaination👌👌👌

[@abdulrashidsinancu1630]

Good lecture. Helpful

[@armanchaudhari4767]

One of the best tutorial for this topic

[@SaravanaKumar-yh2pf]

Thank you for the clear explanation

[@supun_sandaruwan]

Great Video short and sweet

[@dipalijibhakate2815]

A great explanation ,one of the best video till now i watched on Hashmap internal...Thank you for sharing a such content😊

[@mannatsingh9671]

Thank you so much .. very well explained

[@Joyddep]

Thank you for the explanation!

[@yusufsaifi3108]

Plz make full collection type video ur way of represente slide in pictorial way is wonder full .keep it up......

[@pawankumar-ez9mf]

Very good explaining not able to find anywhere else

[@Shaanku]

Thanks for the explanation. It was very helpful

[@user-wg5rd6rl11fgt]

Very nice explanation

[@apurvaRTink]

Thank you sooo much because of your this video i understood the internal working of hashmap after so many days. Nice explaination...🙏🙏

[@amitnakate1293]

Represented in very simplified manner...👍

[@subairkoppam1840]

very good explanation

[@IZZY3201]

Amazing explanation👍👍

[@abhimanyusingh4991]

Great Explanation

[@anshulmaloo5355]

Excellent explanation

[@subhaneilsengupta3053]

Excellent explanation.

[@koushikdas2755]

Just awesome.....Thanks you sir!

[@syedaqib2912]

Really well explained !!

[@bhawnavanani49]

Very Informative

[@ravirajpradhan4720]

All is best ....very nice

[@sunilkumar-yn7mk]

Very good explanation

[@kumartanay3566]

Great explanation

[@nagarjunreddy1040]

Very nice, love it

[@vishalgaikwad873]

Thanks, It's really neat & clear explanation🎉🎉

[@pradipr2434]

Wow. Well explained the concept with practical example👏 And Thank you for the clear explanation. Your channel deserves more subscribers

[@krmanish472]

Thanks for making life easier

[@Imdadullah-FIZFamilyTimes]

superb explanation ,it cleared the concepts.Kindly post the multiple thread and design pattern concepts of java

[@nikhilsai1351]

Excellent explanation worth a watch🔥🔥

[@webencyclop]

thank you 🙏

[@nayanagouda3767]

Tysm for simply explanation... I have seen much vdo bt this is the best vdo.. Tq once again..🙏🏻

[@webencyclop]

If you can, please go through my description & give a star to my repo. It'll be very helpful to me. Thank you ✌️

[@rameshnallajarla5697]

very good explanation.

[@satyamsc]

simple explain for tricky topic, easily understandable.. nice.. 👍

[@webencyclop]

If you can, please go through my description & give a star to my repo. It'll be very helpful to me. Thank you ✌️

[@anandankishore]

Nice Explanation

[@ManishKumar-qx1kh]

Really aprreciate the hardwork. Cn you please make a playlist of all java collections and their internal working.

[@AnkushKumar-fq3mp]

Really nice!

[@ayyappabudihal291]

Good explanation 👍

[@maddynikam3579]

excellent explanation. thanks a lot

[@praveenraturi4095]

awesome explanation

[@ektayoga]

Thank you sir. You are excellent.

[@PadmaPonnu]

Best video I have come across....It would be great if you can add tutorials on multi-threading and concurrency topics....

[@dnyaneshtathode5511]

Good going mate. Keep it up.

[@learnit4499]

You are LEGEND man! The way you explained I can answer hashmap even after death :D

[@muchukundareddy5315]

Awesome.