Core Java With OCJP/SCJP: Collections Part-11 || Map || Hashmap || linked Hashmap

[@shubhchourasia1803]

This man Should be honored with "Bharat Ratna" Award. Its because of your videos I have cracked 10 interviews and currently working in my Dream company Adobe.

[@DurgaSoftwareSolutions]

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[@gadgen571]

Bro can you tell us what all you prepared and which KZbin videos you followed please It will help many @shubhchourasia

[@ankitchauhan7104]

Map : 1:32 Entry Interface : 32:04 HashMap : 39:21 How to use Map Interface methods : 51:04 What is the difference btw HashMap and HashTable? : 1:09:45 How to get syncronized version of HashMap? : 1:19:55

[@multibasicterm2681]

who is learning core java in 2022 by Durga sir.........Love u sir..👌

[@meghas2481]

learning in 2024..........

[@multibasicterm2681]

@@meghas2481 it will be very helpful learn continuously this lecture

[@meghas2481]

@@multibasicterm2681 yes

[@arishashukla9348]

Sir ...you are the best Java teacher you explain so well you actually clear all my doubts related to collection ...but your way of teaching in previous collection series is much better than this collection series...in that series firstly you explain concept then provide note in the form of PPT ( slide) sir please make video like that ...that way of teaching is really very good ..and also making note is also easy in that case... Thankyou for providing such a great leacture to us with free of cost..

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♥️💗💝

[@shamshersingh9680]

One of the best tutorials for Java available online. Durga sir, your teaching quality is unparalleled. All other online java tutorials are nothing infront of your tutorials. For a beginner like me, you have made Java so simple that now I do not have any issues with it. Keep up the good work Sir. Wish you all the best.

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[@YashSingh-xs5yj]

This is the Best video tutorial on java collection - map interface

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[@manojkumarvavilapalli3192]

I have went to many institutes but I didn't get any idea on java. At some point i lost hopes on java and my career then my friend referred me your channel sir. Now after listening your lectures,I have no words to compare your teaching skill. But i strongly believe that god came into my life to teach me java and also to give hope on my life and career in the form of durga sir 🙏🏻

[@DurgaSoftwareSolutions]

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[@sakshamjain3453]

Best Explanation of Collection framework in Java on whole KZbin | Watching on March, 2024

[@DurgaSoftwareSolutions]

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[@horriblecoder7280]

Best teacher in java. I havent seen god but i have seen him teaching me java.

[@vellinari9385]

U havent seen but seen his teaching java? Contradicting

[@rjrajsaha]

A big thanks Sir. This is called a Lecture with awesome explanation.

[@kashmiriking5834]

one more difference between HashMap and HashTable is that whenever we iterate entry from hashMap it will iterate in ascending and in HashTable it will come in descending order naturally (*if key will be integer number)

[@ranveervaghela7030]

Completed watching on Oct 09, 2024 at 12.10 AM :) :)

[@Rahulverma-hl1hf]

Durga sir you ar my favorite teacher till date.but i was surprised how you didn't explained the concept of hashcode and equals method also the linkedlist inside buckets..i was ruined by interview pannel several times ..i thought this video Was sufficient.. sir i would like to thank your classes have really been helpful...i got to know java because of you.thanx sir.

[@DurgaSoftwareSolutions]

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[@anuragbhadoria6487]

Thanks a lot for this detailed video explanation of collection

[@muhammadshahnawaz3679]

cinema hahaha.....lots of love and regards from liverpool.

[@ramyab6961]

Your way of explanation making me to love Java. Thanks a lot sir. Very clean and clear.

[@DurgaSoftwareSolutions]

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[@saadmanahmed860]

retrieve keys 28:30 ** retrieve only keys: Set keySet() ** retrieve only values: Collection values() Key + Values = Entry Set entrySet() Entry interface 31:50 without existing Map object, there is no chance of existing Entry object. So Entry is an inner interface of Map interface.

[@mahammadkhaja9478]

good advertisement regarding full-stack developer.

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[@LazyAdventurer101]

I am an Apex developer.you are seriously AMAZING 👌.you explain everything in detail.because of this video,I have a better understanding of maps.thank you so much👍💎

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[@MrSATYAMJOSHI]

Thanks a lot sir ,I've passed the Oracle OCPJP 6 exam recently with 88%. thanks a lot for your perfect explanations. The topics which seemed tough in K&B book , you made them sound very easy. Thanks again sir.

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[@MrSATYAMJOSHI]

I am already a subscriber of your channel. I saw a new series coming up for OCP 8 ! Keep up the great work! Thanks

[@yogeshverma2604]

Thanku so much for Awesome Lecture Sir, I am big fan of yours.

[@SOHANSINGH-jg2cf]

thank u very very much sir for ur clean explanation and depth explanation... Really Sir U are the God of JAVA... Sir

[@arunprasadhsj]

Sir , i just came across your video and u explain concepts in depth and in a way that everyone can understand , Thank you very much Sir . You are simply amazing . :)

[@DurgaSoftwareSolutions]

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thanks lot for giving exclusive java content

[@akshaykumarsingh3637]

thank u very very much sir for ur clean explanation and depth explanation.

[@DurgaSoftwareSolutions]

Hi Akshay.. your wishes motivating me to do more for you. You Can watch complete Core Java videos by clicking these links... 1.Core Java With OCJP/SCJP-Language Fundamentals kzbin.info/aero/PLd3UqWTnYXOkWWJd8flj3echGYm3y5dXo 2. Core Java With OCJP/SCJP-Operators & Assignments kzbin.info/aero/PLd3UqWTnYXOl8wA1uxYRjiHPaDcnEuYGF 3. Core Java With OCJP/SCJP-Flow-Control kzbin.info/aero/PLd3UqWTnYXOnMrf2NOEA61tXwCXdbvoi4 4. Core Java with OCJP/SCJP-Exception Handling kzbin.info/aero/PLd3UqWTnYXOnSkaum39zWYI6bPb3i7liz 5. Core Java with OCJP/SCJP - Multi Threading kzbin.info/aero/PLd3UqWTnYXOlHj_fVVjUIVHjD5uEy2kk46. 6. Core Java With OCJP/SCJP-Declarations and Access Modifiers kzbin.info/aero/PLd3UqWTnYXOnMH-BdI3A39-8v7m9xMP2z 7. ore Java With OCJP/SCJP- OOPs(Object Oriented Programming) kzbin.info/aero/PLd3UqWTnYXOn7zNVRm_ZjnWqnf5osnKxq 8. Core Java With OCJP/SCJP- Generics by Durga kzbin.info/aero/PLd3UqWTnYXOn4AAHRh5lmOXhoU0tZwTfU 9. Core Java With OCJP/SCJP: Collections by Durga kzbin.info/aero/PLd3UqWTnYXOklywocjGz7Z02rqbLegX22 10. Core Java With OCJP/SCJP: Garbage collection by Durga kzbin.info/aero/PLd3UqWTnYXOllQyx0M9BgrqdRno8HMaU0 11. Core Java With OCJP/SCJP: java lang package by Durga kzbin.info/aero/PLd3UqWTnYXOlEa6-58nC6bnpx43VZiTnN 12. Core Java With OCJP/SCJP: RegularExpresions by Durga kzbin.info/aero/PLd3UqWTnYXOkRBNGYQcanie7yJxnVh7Vy 13. Core Java With OCJP/SCJP: File I/O by Durga kzbin.info/aero/PLd3UqWTnYXOkEwNL3uI7PSS-FDAxhtXJ3 14. Core Java With OCJP/SCJP: Concurrent Collections by Durga kzbin.info/aero/PLd3UqWTnYXOlrFicu7spv8Z772MgGbXfQ 15. Core Java With OCJP/SCJP: Serialization by Durga kzbin.info/aero/PLd3UqWTnYXOkE3etrqOSPgkUdcxrEc0Y1 16. Core Java With OCJP/SCJP: Inner class by Durga kzbin.info/aero/PLd3UqWTnYXOnubQH6Gt8O8Dg-115U0ftk 17. Core Java With OCJP/SCJP: Assertions by Durga kzbin.info/aero/PLd3UqWTnYXOnaOQ694hLSx-U9KJJ8KMZR 18. Core Java With OCJP/SCJP: ENUM by Durga kzbin.info/aero/PLd3UqWTnYXOmAtH3O4mUyaFlX8paWwye9 19. Core Java With OCJP/SCJP: Interafe and Abstract class Loopholes by Durga kzbin.info/aero/PLd3UqWTnYXOm5UXbKfj8iZfWQNcLPL3HC 20. Core Java With OCJP/SCJP:Devlopment by Durga kzbin.info/aero/PLd3UqWTnYXOkYSrI3Ji-cmIWE9_qSh8oq 21. Core Java With OCJP/SCJP:JVM Architecture by Durga kzbin.info/aero/PLd3UqWTnYXOl3pHYnuCUoyD_GFKp6SPRA 22. Core Java With OCJP/SCJP: Multithreading Enhancement by Durga kzbin.info/aero/PLd3UqWTnYXOlSrYBSaCc7KBEXtaLWt_u5

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thank u.

[@PrasadKopparthi]

Durga Software Solutions

[@prashantjadaun6952]

you are best sir.......no words for you

[@DurgaSoftwareSolutions]

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[@chetansharma3358]

Never seen such teacher before ever

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[@malharjajoo7393]

Your explanation depth is really fantastic.

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[@snghpiyush]

thank u very very much sir for ur clean explanation and depth explanation... Really Sir U are the God of JAVA... Sir please upload all the videos related to String Handling.................

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we love Durga SIr❤❤❤

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[@rajasrim6573]

Hi Sir,Your knowledge is wonderful.Thnaks a lot for sharing with us.I haven't found this kind of knowledge in any website. After watching the video ,in some java documentation I found that Map.Entry is a static interface .Why should it be static.Static means something related to class then here why interface is static?

[@amitkumar-mm2hu]

thanks sir for all valuable tutorials !! it is very informative with clean and clear explanation

[@DurgaSoftwareSolutions]

Hi Amit. Thank you very much for your feedback

[@subhakar9015]

Thanq sir...tasks completed

[@Mr.SmileGarg]

I got your fan sir, the way you have explained string logics is awesome. Please make one generic video where we can cover all string and collection concepts.

[@DurgaSoftwareSolutions]

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[@mani_tyagi10]

sir you said that when there is a condition like .interface A{ interface B{ }} the inner interface is always public and static by default and we can access them directly. In your inner class video.

[@somanathbehera1622]

Sir You are the best java trainer. In this video you have not taught how hashmap works internally. Kindly upload the same.

[@mohanrajsenthilnathan856]

Thanks for the video adding null values at first in treeset was possible until 1.6, but not from 1.7. it was considered as defect and java fixed it. now we cannot add null value even at first.

[@sampathrai9857]

Thanks for info

[@kingajable]

he mentioned this in last videos

[@er_ma3]

Yes he has mentioned in previous videos🎥.

[@rehanshakeel4966]

Please add notes after every concept is completed, as you did earlier.

[@DurgaSoftwareSolutions]

Hello Friend. Plz contact our online team [e-mail] or call us on this number [phone], 7207212427/28

[@DeepBharty]

Thank you from bottom of my heart 😊

[@siddulodugu2238]

Sir do we have advanced java concepts..? If yes can u give me the link

[@moinnawazkhan4949]

Sir you covered each and every thing

[@pramjee007]

Happy Teachers' Day Sir:)

[@ananyaborah6847]

your explanation is very comprehensive. Sir can you kindly classify the videos in some organized way.

[@jvsnyc]

It appears in at least three playlists. This is one of them: kzbin.info/aero/PLd3UqWTnYXOmx_J1774ukG_rvrpyWczm0

[@RahulTiwari-nq3jp]

dear sir, Map concept vedios are not in youtube fully....please provide all sir..i need it thnk you for giving valuable information

[@prasannainamdar7844]

Super..teaching

[@DurgaSoftwareSolutions]

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[@shaikbilalrafi6820]

Nice explain sir

[@DurgaSoftwareSolutions]

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[@VijayrahulRaja]

Thank you very much Durga sir for this in depth explanation.

[@RahulTiwari-nq3jp]

thnk you sir giving valuable information about HasMap and LinkedHashMap,,,,,sir please provide String handling Also..i need it

[@rajnimarwaha6153]

There is no slide for this video. Can anyone tell me if I can get the slides for this video thanks

[@kumarranjith2574]

Hi Durga sir ,teaching style (super ,good ) i Need how Hashmap work Internally ,please share me any videos. hlp me

[@DurgaSoftwareSolutions]

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[@gurunathkulkarni-ry8yv]

Based on hash table

[@kumarranjith2574]

Thanks I wil do

[@ankitamall3132]

awesome sir

[@DurgaSoftwareSolutions]

Hello Ankita. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@utsavmodh9698]

Thank you so much 🎉

[@satishchitimoju7308]

Great work.. Sir every one expecting Internal implementation of HashMap ?. Could you please explain it. Once again for your great work..

[@rajasrim6573]

I got the answer sir..Pls correct me if I am wrong. Map.Entry is static so that we can do any operations with objects in Entry(Key,Value) .Simply by using Interface name we can call methods ..

[@rexsam3134]

Can you give a better example of key and value if both are objects? Not primitive data types like numbers 1,2,3 etc for key

[@DurgaSoftwareSolutions]

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[@jvsnyc]

That is a good question, especially how much better and safer it is to ensure that such keys are immutable.

[@nagamallisupraja860]

Hi ratan sir....can u pls upload collections part-1,3,5,6,9....etc.some vedios have some problem sir pls check that vedios like collection part-1vedio .and once reupload pls sir.

[@KannadatechieKA28]

HashTable is Underlying data structure or implementation class,because for HashMap,LinkedHashMap,HashSet,LinkedHashSet underLying Data strucure is HashTable

[@rameshyadav2066]

clean explanation...........

[@Roaming_India]

Add value for a duplicate key creates replacement with new value or it is an error?

[@DurgaSoftwareSolutions]

Hello Raj. Plz contact our online team [e-mail] or call us on this number [phone], 7207212427/28

[@eadunuripranay5977]

replacement of old value with new value & returns old value.

[@susantaghosh504]

Thank you sir...nice explanation. please upload part 13th of this series

[@Papaguniua]

Hats off!! Fantabulous

[@anil2009]

sir please take "Ugh" and "VII" as keys and put them in Hashmap sir

[@rizwanshahid1447]

Thanks so much, Durga Sir.

[@arunachalamk1145]

god of java is durga sir

[@DurgaSoftwareSolutions]

Hello Arun. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@shantanugoel3511]

I must say DurgaSoft means Java and Java means DurgaSoft and yes does anybody heard John cena ringtone at 25:07-25:11? haha..

[@Skripturz]

haha i heard like the beginning of it but then it gets cutt off quickly

[@EngineerVaibhav]

146 video completed❤🎉

[@jyothikethireddy5712]

Hi sir I have a doubt HashMap underlying data structure is HashTable right but why it is not synchoronized && Hashtable is synchronized then HashMap also synchronized right bcs of its data structure .

[@DurgaSoftwareSolutions]

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[@pravinpatidar98]

As we know HashMap underlying data structure is HashTable so how there is difference between hashmap and hashTable

[@DurgaSoftwareSolutions]

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[@manishjaiswal7768]

All method of hashmap is non synchronized

[@trishasawantphotography6409]

Question : suppose I have a alphabates A to Z with some random Integer values, then how I can put them in hashmap and get output if user put A then ans will be 2 like this

[@kamalapuramsivasankar7]

Thanks sir..

[@surbhibajaj3586]

Map.Entry is nothing but interface but then how the object m1 was created in the above example???Since interface objects can't be created?

[@DurgaSoftwareSolutions]

Hello Surbhi. Plz contact our online team [e-mail] or call us on this number [phone], 7207212427/28

[@manishakumari9566]

There is doubt in methods access modifier, if methods of Hashmap have "default" access modifier then how would be possible to access those methods in other package

[@Pri_-]

Thank you so much Sir..

[@shubhi2648]

Thanks for such awesome explanation. When we print entrySet , it is printed in following manner: [K=V, K=V,...] Is there any toString() method in action here..?

[@Manojdeevi1997]

How to given dynamic value in hashmap in java

[@DurgaSoftwareSolutions]

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[@karamjeetkaur8618]

Hi Durga Sir , An interviewer once asked me 2 ways to synchronize hashmap . One is synchronizedmap which you have already explained in this video , which is the other method ?

[@kprajwal7599]

typecast to hashtable?

[@sandeepnandagiri9015]

concurrentHashmap() method

[@hacking1007]

sir please event handling ka video bniyaa

[@chetanghule1466]

You just 'Broke the Ice" on Collection and hashmaps as simple as that.

[@shreedharsahu9774]

thank you sir

[@chetanchavan1187]

Indian Hero in Java

[@DurgaSoftwareSolutions]

Hello Chetan. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@pavankumar31]

why entryset is needed when we are getting entries when we call the map object alone...Please explain?

[@Bigdaddy91982]

EntrySet returns a set(array). map returns an object

[@akashajankar678]

Since there is no connection between collection nd mapp how we can use synchronised method of collection interface...... Pls someone give ans

[@DurgaSoftwareSolutions]

Hello Akash. Plz contact our online team [e-mail] or call us on this number +918885252627,7207212427/28

[@sandeepnandagiri9015]

Hi Akash, it is not Collection Interface, this is Collections class which extends Object class, it has common methods of collection and Map interfaces related classes, and synchronizedMap() method is one of them.

[@anushakt5308]

Sir what is the difference in the code when we apply synchronization to the map???

[@mohandast52]

synchronization provides Thread-safe

[@Lakshmankablog]

👍🥳🐎👌👏

[@indramaniarora7901]

Sir, hashmap's underlying data structure is hashtable. So, the hashmap shd also be synchronized. But it is not. Why?

[@vishalpanwar9550]

Both HashMap and Hashtable are implemented using Hash Table dataStructure.

[@shaiksalmabegum2701]

how we are using the Set interface without implementing it.

[@DurgaSoftwareSolutions]

Hello Salma Begum. Plz contact our online team [e-mail] or call us on this number [phone], 7207212427/28

[@nadheeshgeorge3893]

Great work Sir !!! Thanks much for all the videos !! _/\_

[@rajivranjan8975]

Sir your teaching style is not compare with anyone I like your lectures too much please you teach spring also So many lectures I have seen but still did not understand so please refer good lectures for spring also

[@nagaom9798]

sir for KeySet(),values(),entrySet(), how can we invoke them using Map object?Map is an interface know sir!

[@vishalpanwar9550]

We are invoking these methods on implementation of Map interface i.e HashMap class and not on Map interface.

[@javashashavali]

Lion enter in the field Durga sir .......

[@DurgaSoftwareSolutions]

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[@dhanushsivajaya1356]

Thankyou sir

[@Ritu_Kashvi_Dance_Studio]

In interview I was asked this question If equals is always true and hashcode is always same then how many objects will be created ? Please can you answer Sir ?

[@mani_tyagi10]

only 1

[@prashantjadaun6952]

big fan sir...

[@DurgaSoftwareSolutions]

Hello Prashant. Thanks for your valuable feedback. It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/kqvaf2

[@yoganandathanniru5979]

Implementing classes for Entry are 1) AbstractMap.SimpleEntry 2)AbstractMap.SimpleImmutableEntry

[@mohantraju]

Genius

[@DurgaSoftwareSolutions]

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[@sarbeshkumarsingh1328]

Best Explanation

[@ahmidahmid9303]

thanks

[@rudrikasharma5660]

Map.Entry m11 = (Map.Entry)itr.next(); this is throwing exception for me java.lang.ClassCastException : java.lang.String cannot be cast to java.util.Map$Entry

[@malikluti4612]

Thank you!

[@DurgaSoftwareSolutions]

Hello Malik, Thanks for your valuable feedback.It will boost us to do new things. Please subscribe to get updates about new videos. You can view all other Core Java with SCJP/OCJP Videos by Durga sir in the following link: goo.gl/U1KKyi You an see more Java videos following link: Java tutorial by durga sir goo.gl/XWb4RL Java 9 by durga sir goo.gl/hXGyBW Java 1.8 Version New Features by Durga sir goo.gl/iHXXYU Adv Java JDBC Tutorial by Durga sir goo.gl/8q16Eo OCJA 1.8 Java SE 8 Programmer - I (1Z0 - 808 ) By Durga sir goo.gl/gC6R7f Core Java by NagoorBabu sir goo.gl/s6Nvj1 Advenced Java by Nagoorbabu sir goo.gl/ZZonzJ CoreJava by Ratan goo.gl/3VM19v Advanced Java jdbc by Ratan goo.gl/Rn2UXr Advjava tutorials - JSP by Ratan goo.gl/Z6ytxm Adv java servlets tutorial by ratan goo.gl/zTwi9y Servlet and JSP Tutorial by anji reddy goo.gl/jZMRUv Advanced Java Jdbc by Anjireddy goo.gl/16CGzX Hibernate byAnjireddy goo.gl/qQojvZ Struts by Anjireddy goo.gl/nE1Eof Spring by Mr.AnjiReddy goo.gl/NfN14R ADV JAVA by Naveen goo.gl/bhSsXF Spring by Mr.Naveen goo.gl/huVwFN Hibernate by Mr. Naveen goo.gl/TY3Wpd Struts by Mr.Naveen goo.gl/Vkmiw7

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