Java Collections Framework-Part9 | Map & HashMap Concept | Hands-on

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  • Опубликовано: 8 янв 2025

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  • @amlam5685
    @amlam5685 4 года назад +42

    I bet no one will google about Map, hashmap, and Entry after watching this video.
    Thank you for these amazing explanations and clarification, you are the Best SIR.God bless you

  • @Tommy-km4wo
    @Tommy-km4wo 2 года назад +20

    The detail is amazing. More than I learned in class. Thanks!

  • @dineshahuja848
    @dineshahuja848 Год назад +2

    Very detailed video. brilliant tutorial on Map and HashMap. Only minor change i found out Entry Interface is sub set of Map interface. but in this tutorial it is mentioned as part of HashMap.

  • @rahulkotian3535
    @rahulkotian3535 4 месяца назад +1

    Superb best channel for Java on RUclips

  • @JP-programming
    @JP-programming Год назад +1

    my favorite teacher...you know Java sir big respect .

  • @jayasree2033
    @jayasree2033 2 года назад +1

    You are the best teacher.I am learning a lot through your videos.The first thing I am going to do after getting job is joining your channel.
    Thankyou for all these efforts for us.You deserve more subscribers.

  • @anitagola4794
    @anitagola4794 7 месяцев назад +2

    Sir apki teaching techniques bhut achi hai mera 11 sal ka gap ho gya hai mca complete hote hi meri marriage ho gyi to me job ni kr payi isliye 11 sal bad mene apki video dekhkr sb kuch fir se sikh liya thanku sir🙏 ab shayad me job le sku it company me

  • @sanjiwanipole3666
    @sanjiwanipole3666 2 года назад +1

    Explanation is superb and no unwanted talk in between the session...

  • @sanghamitramishra6169
    @sanghamitramishra6169 Год назад +4

    I was worried to switch automation QA after having 14 years of functional QA. After going through your videos I think the best trainer you are in this world ..concepts interview Q & A everything you make so easy for me now ...Thank you so much sir..

  • @akshaybhatia7977
    @akshaybhatia7977 3 года назад +4

    I really found this very helpful tutorial to get your basics clear on HashMap. Thank you for creating this content.

  • @jasper5016
    @jasper5016 3 года назад +2

    This is the best explanation for Map and HashMap. Very detailed and concise. Thanks a lot. Subscribed.

    • @sdetpavan
      @sdetpavan  3 года назад

      Glad it was helpful!

  • @Rocky-t4c
    @Rocky-t4c 4 месяца назад

    to the point explaination no lagging only clear explaination very much thank u sir

  • @anayapathak7162
    @anayapathak7162 2 года назад

    Being a C++ programmer, i watched this video just before my java coding round. Feeling quite confident.

  • @sasireka7974
    @sasireka7974 4 года назад +1

    Yr way of teaching is awesome

  • @hennymakaveli
    @hennymakaveli 4 года назад +6

    Thanks for the tutorial? What’s is the best time to use Queue in automation and any tutorial on other classes that implement queue interface? Can you help us with converting Map to Map ?

  • @pradeep492
    @pradeep492 11 месяцев назад +1

    Vedios are good,with detailed explanation. I would suggest to make wordings corrections,like in map you said new record is repalced with old record when you add new entry with duplicate key and different value.But actually it is old record is replaced with new record.

  • @pragyasharma9642
    @pragyasharma9642 2 года назад +1

    you r just awsum thank u so so so much i have been searching for this for so long ... bt now i find the right place ........ thank u so much sir

  • @aarunkumar
    @aarunkumar 3 года назад +1

    Thank you sir for collections framework classes vedio series

  • @sureshgeddada6166
    @sureshgeddada6166 Год назад +1

    Very useful video on collections work, thank you sir

  • @aswinsrikanth408
    @aswinsrikanth408 Год назад +1

    Very well explained Sir
    Thank you Sir!!

  • @gayathrichittaboina2775
    @gayathrichittaboina2775 Год назад +3

    thank you so much for this wonderful treasure sir!🙏

  • @anupamr437
    @anupamr437 3 месяца назад

    Just for my note:
    Hashmap is a class implementing Map interface.
    Hashmap implements Hashtable data structure.
    Entry interface is nested interface of Map interface.

  • @jayaprakash1546
    @jayaprakash1546 Месяц назад +1

    very nice tutorial sir

  • @skbhaiforyou
    @skbhaiforyou 2 года назад +1

    thank you sir,,,,i understand clearly.

  • @peterbet6487
    @peterbet6487 3 года назад +17

    Somewhere in between, 26-27 min, you said, HashMap is an Interface and Entry is sub-interface of HashMap. But isn't HashMap a class ? It is not an Interface and Entry is an interface that implements Map interface not HashMap. Could you please clarify for your students ?

    • @udaykumar-ur2ug
      @udaykumar-ur2ug 2 года назад

      TQ I'm confused at this time TQ for clearification

    • @abhay6276
      @abhay6276 2 года назад +1

      Please clear me in easy way...still i am confused...

    • @subhajitchakraborty8724
      @subhajitchakraborty8724 2 года назад +2

      Exactly
      Map(interface)>>>HashTable(class)
      >>>HashMap(class)
      Map(interface)>>>Entry(interface)

    • @abhay6276
      @abhay6276 2 года назад

      @@subhajitchakraborty8724 ok....means entery is a subset of map interface...m i right...?
      What is implement.. ? Please reply sir

    • @subhajitchakraborty8724
      @subhajitchakraborty8724 2 года назад +1

      @@abhay6276
      One interface can extend another interface...
      But can not implement another...
      I think the class will be...
      Abstractmap.simpleentry,
      Abstractmap.simpleimmutableentry...
      And the interface will be...
      Interface map.entry....

  • @mudunurisaikrishnamraju5275
    @mudunurisaikrishnamraju5275 4 года назад +2

    Ur explanation is superb 👌. Can u pls cover full core java and data structures.

  • @prasaddevathi09
    @prasaddevathi09 2 года назад +1

    Neatly Explained.

  • @sindhusudhakaran1731
    @sindhusudhakaran1731 4 года назад +1

    Awesome video !! Thank you very much

  • @sarah-fu6hw
    @sarah-fu6hw 3 года назад +1

    thank you sir very good explanation

  • @MentesIntrigantes-js6it
    @MentesIntrigantes-js6it Год назад +1

    you are the best

  • @emonyousufy5670
    @emonyousufy5670 4 года назад +1

    Nice seeing you sir!

  • @raji1358
    @raji1358 4 года назад +1

    thanks for awesome tutorials.

  • @abhijeetdhumal1217
    @abhijeetdhumal1217 3 года назад

    30:55 Demo Practical

  • @seenuvlr
    @seenuvlr 3 года назад +1

    Extraordinary explanation. 🙏

  • @nandiniraj6206
    @nandiniraj6206 3 года назад +1

    Well explained 👍

  • @nikeshkumar-gl1fv
    @nikeshkumar-gl1fv 3 года назад +1

    Amazing explanation

  • @akshayavenkatesh3793
    @akshayavenkatesh3793 3 года назад +1

    Best explanation

  • @rajansethi6767
    @rajansethi6767 Год назад +1

    At 26:38 you said under Hasmap Interface entry Interface exists , earlier you said Hashmap is a class, please clarify that point.

    • @harindersinghgusain9372
      @harindersinghgusain9372 Год назад

      yes that is the same question from my side Hashmap is interface is this correct and also entry is subset i did not get this point . Can you please explain little bit confusing here .
      Thanks in Advance

    • @priyakrish7433
      @priyakrish7433 10 месяцев назад

      Entry interface is nested interface of map interface not hashmap. Hashmap is class

  • @myvoice4407
    @myvoice4407 Год назад +1

    Hi sir,
    At last step using iterator method
    While(itr.hasNext())
    {
    //i simply wrote like this
    System.out.println(itr.next());
    }
    And then o/p is
    101=john
    102=david
    103=scott
    104=mary
    105=tye
    So we can write like this no instead of writing map.entry all those

  • @gokulm6299
    @gokulm6299 Год назад +1

    Thank you sir...

  • @explorersbasichunt4117
    @explorersbasichunt4117 3 года назад +3

    Sir, can we add single key & multiple values in hashmap?

    • @sdetpavan
      @sdetpavan  3 года назад +1

      Yes. but you can store multiple values as a single object.

  • @himanshusingh5118
    @himanshusingh5118 3 года назад +1

    *Difference between Print result of:*
    m & m.entrySet ?? (same)

  • @preetamvarun9219
    @preetamvarun9219 11 месяцев назад +1

    Thank you sir!

    • @sdetpavan
      @sdetpavan  11 месяцев назад

      You are welcome!

  • @BrainblastHub
    @BrainblastHub Год назад

    I wish you could also cover hashcode and equals method explanation

  • @bireswaradhikary2757
    @bireswaradhikary2757 4 месяца назад

    27:00
    I think Entry SubInterface of Map (I(

  • @laxmikambar7610
    @laxmikambar7610 8 месяцев назад +1

    Thank you sir

  • @omkarpharate9530
    @omkarpharate9530 2 года назад +1

    Pavan sir==Trust

  • @venkatapathibatchu1783
    @venkatapathibatchu1783 3 года назад +1

    Thanks Pavan

  • @ambativenkatalaxmi9797
    @ambativenkatalaxmi9797 10 месяцев назад +1

    Nice sir

  • @8073-z6w
    @8073-z6w 2 года назад

    thanks a million sir.

  • @jasper5016
    @jasper5016 3 года назад +2

    Do you have any tutorials on Java Lambdas or Streams?

    • @sdetpavan
      @sdetpavan  3 года назад +1

      yes. plz check playlists

  • @yaswanth2332
    @yaswanth2332 Год назад

    you must have also added the concept of comparable and comparator interfaces in this collections tutorial.

  • @dharmendramakineni
    @dharmendramakineni 5 месяцев назад

    Sir , I have a doubt. How Entry interface can be child of HashMap, Since HashMap is a class right ? Entry is child interface of Map right ?

  • @yogeshganpule2695
    @yogeshganpule2695 11 месяцев назад

    Now can we get some coding challenges and how to approach them with collections @SDET-QA

  • @Shwethatp
    @Shwethatp Год назад

    Sir what about TreeSet?TreeSet is also a class which implements set interface right?

  • @anitagola4794
    @anitagola4794 7 месяцев назад

    Sir kya possible hoga esa gap ki wajah se koi problem to ni hogi

  • @rajkumarm25
    @rajkumarm25 Год назад

    Please tell us the exact return type of entrySet. Google is confusing me...

  • @rahulkantjha
    @rahulkantjha 3 года назад +1

    Your content is superb and personally I've learnt so much from your videos.
    Just an advice.
    For 15 mins topic you take 1 hour.
    If you want to increase your subscribers and views please make short videos.

  • @imbhavaniprasad
    @imbhavaniprasad 3 года назад +1

    but you told hashmap a class and again saying entry is child interface to hashmap interface?

  • @hmkdbambaragama7432
    @hmkdbambaragama7432 Год назад +1

    thank you

  • @chandrashekarreddyyeradla9177
    @chandrashekarreddyyeradla9177 2 года назад +1

    HashMap is not interface it is class
    Entry is not sub interface of Hashmap
    Sub interface of Map
    Map.Entry

  • @alexnigus6572
    @alexnigus6572 2 года назад

    Your is explanation is superb.i want to ask you on duplication of the key ......................i try to duplicate the key and i try to run the ouput will be updating the key . why???

  • @basweshwaramlapure8807
    @basweshwaramlapure8807 2 года назад

    hi Sir, Very nice video, you are doing a very good job, Thank you.
    How can we update the value for a specific key ?

  • @indeepaherath6920
    @indeepaherath6920 2 года назад

    sir is there a way to create a list of maps or Map with collection of maps?

  • @SatishAddala
    @SatishAddala 4 года назад

    Pavan sir, any idea on Qmetry automation framework?

  • @prikshitverma3885
    @prikshitverma3885 4 года назад

    Thank you sir

  • @priyadarsinisahoo2544
    @priyadarsinisahoo2544 9 месяцев назад

    Sir HashMap is a class but you told in starting of Entry(I) like
    Interface HashMap{
    Interface Entry {
    }
    }
    It's like bit confusing me .

  • @abhisheksamantray5244
    @abhisheksamantray5244 2 года назад

    hello sir, can I extract all the keys value, like[101,102,103,104], using (for) loop, not using (for each) loop, Please replay sir🙏

  • @omgfinishers7405
    @omgfinishers7405 4 года назад

    Hello Hope you see this comment .....
    I am new to automation testing and just have switched from development to Automation Testing.....
    I know my question might be stupid and baseless but as a fresher in Automation/SDET I always wonder about this as I want to continue growing in the automation field and which is what motivated me to switch from development....But this one question always keeps me down and bothers me a lot in my path....I dont know why but my developer friends always tell me "You should be in development as the focus more now is shifting towards developer doing everything rather than having a separate qa automation sdet ....Developer also does some automation in some companies .....This is what my friends tell me and which bothers me a lot .....I igonre them But as a human having little experience in automation what is your take on this? I know this might be a stupid question that only a fresher can think of but my friends always warn me that future is more towards the developer doing everything and no separate tester will be required.....I 100 percent dont want this to be true as I love automation but one time I want to listen to your thoughts on this and clear my stupid doubt(even if this question pisses you off) You are my teacher so I ask you as a student the reality of this
    (I have gone anonymous because I am ashamed by my own question )
    If you read this please reply ......🙏🏻

    • @peterbet6487
      @peterbet6487 3 года назад

      Your friends could be right because with the rise of Agile methodology and the extensive skills a technical QA possesses, there would be little difference between QA and Dev down the line. It is trending that way. With that said, QA industry is not disappearing abruptly. In fact, IT job market is so volatile that today's dev skills won't be sufficient with the rise of AI. So, don't panic. Whichever industry you like, grow in it.

    • @NuanDaa
      @NuanDaa 2 года назад

      Dude if you don't want to work like a nerd stop to do that. Don't think over and over about that and just change your line that's it.

    • @Forty3Stories
      @Forty3Stories Год назад

      This question was asked 2 years ago and I would say the demand for automation testers are more still. Keep learning 😊

  • @sajalkumar9649
    @sajalkumar9649 Год назад

    why is it written hashmap interface. it is a class right??

  • @Manojdeevi1997
    @Manojdeevi1997 3 года назад

    How to give dynamic value in hashmap in java

  • @vannarsai4065
    @vannarsai4065 2 года назад

    Where your learn this so much of stuff?

  • @ashutoshanand69
    @ashutoshanand69 4 года назад

    Nice sir

  • @prikshitverma3885
    @prikshitverma3885 4 года назад

    How can i find the other videos related to selenium with java...I m kind of new

    • @sdetpavan
      @sdetpavan  4 года назад +1

      Please check playlists

    • @prikshitverma3885
      @prikshitverma3885 4 года назад

      @@sdetpavan THANKS sIR! i AM FOLLOWING YOUR VIDEO FOR MANNUAL AS WELL SIR!!!..AFTER COMPLETING THEM I WILL MOVE TO SELENIUM WITH JAVA!!

  • @ashutoshanand69
    @ashutoshanand69 4 года назад

    Sir how can i found selenium tutorial

  • @kennyi1200
    @kennyi1200 3 года назад +1

    Thanks

  • @Raj-ql2vz
    @Raj-ql2vz 2 года назад +1

    you are repeatedly saying hasmap is an interface , while explaning about entry interface

    • @Oscar-x3m
      @Oscar-x3m 6 месяцев назад

      Yes, HashMap is a not a "Interface"

  • @rachelbhoy9563
    @rachelbhoy9563 Год назад +1

    superb explanation

  • @noncopyrightmusics3798
    @noncopyrightmusics3798 Год назад +1

    superb explanation