Core Java With OCJP/SCJP: Collections Part-12 || linked Hashmap

[@ozgurleo]

Neither Netflix nor Amazon Prime, in the corona lockdown, the most entertaining way time to spend is watching you sir.

[@Lakshmankablog]

Yessssss😅

[@varunjohnjohn]

Hashmap immediately gave left and right to garbage collector.. LOL 😂😂😂😂😂😂 JVM telling GC- Hashmap is stronger then u don't go that side.. 😂😂😂 Durga sir u r the great... King of JAVA

[@DurgaSoftwareSolutions]

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[@vangasuryateja6327]

even 5 years child also can understand your teaching sir.. this is the teaching required in now a days society.. lots of namaskaramulu to you sir

[@DurgaSoftwareSolutions]

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[@remorajesh122]

Wow...wow.... What an explanation... Durga sir made the Java as a children's story ...now I can say that anybody who learnt Java with Durga sir ..can DANCE in front of JAVA. LIKE ANYTHING..

[@DurgaSoftwareSolutions]

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[@MandarinHub]

I can't stop laughing when he say GC is dancing and another object is crying, OMG, you are hilarious!

[@harshpalsingh1145]

yeah, he does not let us get bored in his long lectures

[@ankitchauhan7104]

LinkedHashMap : 1:08 Difference btw == and .equals() : 13:05 IdentityHashMap : 17:45 WeakHashMap : 32:42

[@utsavmodh9698]

extraordinary content 🎉

[@DurgaSoftwareSolutions]

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[@ayushipandey6924]

I reached till this video and I am studying from Durga sir's video from very starting. Now I say "Aeyoo" with sir too🤣🤣 . Anyways, thanks for uploading best videos for Java.😊

[@shubhamkotnala6743]

This is the first time someone explained GC in so much simplified form.. Hats off sir 🙏

[@DurgaSoftwareSolutions]

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[@shubhamkotnala6743]

@@DurgaSoftwareSolutions I am a software engineer and i met many software engineers who said to me many times that "Durga soft k video dekh sab smjh aajaega.. " . this is your achievement sir.

[@tarunkumar1816]

No one can explain java like this manner , he just drink java in a cup of tea, superb explanation.

[@DurgaSoftwareSolutions]

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[@tasnuvamarziya5598]

Can i watch this playlist to learn the whole java oop concept as this playlist is 7 years ago?

[@amitsillarkar2609]

Best funniest part till entire series Hashmap, weakHashmap and garbage collector fight😁😆😆😆😆 thanks u Durga Sir. You are a King of a java king......!

[@DurgaSoftwareSolutions]

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[@tasnuvamarziya5598]

Can i watch this playlist to learn the whole java oop concept as this playlist is 7 years ago?

[@ashapawar6976]

You are really good teacher sir...im teaching java with enjoyment.. really knowledgeable and good teaching

[@DurgaSoftwareSolutions]

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[@vortexgaming5029]

I am heartly thankful to you sir , I always watch your videos and learned complete java with you only. Sometimes i don't understand the java concepts in my class but I don't take any stress because i know the best teacher whose teaching is amazing and who always tries to share his great knowledge with his students and he is you only.🙏🙏

[@DurgaSoftwareSolutions]

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[@remorajesh122]

In olden days...Java is the king Bcos it is hard to understand but Now he came to break the legacy under his feet..

[@DurgaSoftwareSolutions]

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[@dsh35a]

best teacher i ever seen in my life til now🙏🙏🙏🙏

[@DurgaSoftwareSolutions]

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[@aharikrishna4863]

Coaching ki cheyadaniki money ledhu Kaani me videos calla memu Java nerchukogaluguthunnam tq durga sir

[@ShreyasPatilVlogs]

Your lectures are more supportive than hashmap to keys!

[@javawidhitesh]

OutStanding Explain Sir.Thank You For Giving such type of Beautiful Content.

[@DurgaSoftwareSolutions]

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[@bandaruneeraj7246]

Super master peace with full of content and comedy😂❤, once again thank you for your lectures.

[@DurgaSoftwareSolutions]

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[@azhargayawi]

thank you sir, i dont know why thic channel has this much less subscribers,

[@anudqece483]

Dhievamae Dhievamae nandri soluvan dheivamae...Super sir Thank you a lottttttt.

[@DILIPKUMAR-ws7td]

GC is dancing in front of.....😂😂😂😂😂 You are Wonderful teacher.........Thanks....!!! If i got a teacher just like you in my Childhood Days then I also Left and Right to IIT . I haven't seen a teacher just like you in my whole days Thanks again Durga Sir for explaning a very difficult Prog. Lang. in a easiest way. 🙏

[@DurgaSoftwareSolutions]

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[@harshdeep1953]

durga sir is rajanikant of java ...best lecture. : D

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[@sanjanadebnath9749]

Thank you sir for making java concepts so easily understandable. Really grateful.😀

[@DurgaSoftwareSolutions]

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[@rubygill8178]

I enjoyed this session with a great comedy....HashMap gave left n right to gc....and WeakHashMap......doesn't open his mouth in front of gc.....🤭🤭🤭😂😂😂 both concept are clear.....😊😊Ty Sir....GBU...😇😇😇

[@DurgaSoftwareSolutions]

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[@maheswarani5485]

garbage collector story ....so nice ..i can easily understand.....i can left and right...in hashmap concepts

[@varunjohnjohn]

Sir this tutorial was soo funny in the series. I'll never forget this concept..

[@praveenasrinivasan]

sir seriously u are rockstar of java.. after briyani inconsistency story in threads. this GC comedy cinema makes so fun to understand concept very clearly. you are god of java. No body in youtube gives crystal clear explanation for each and every concept in java. thank you so much sir.

[@DurgaSoftwareSolutions]

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[@dipalisoniofficial]

Awsome concept conveyed by u for garbage collector n Hashmap

[@DurgaSoftwareSolutions]

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[@arjunvetal5145]

actually legendary durga sir dominant JVM

[@Ervaibhav75]

Ur the God of Java sir 🙏

[@DurgaSoftwareSolutions]

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[@EngineerVaibhav]

== and .equals() In general == operator meant for reference comparison or address comparison but In general . equals () method meant for content comparison.. ❤

[@DurvaThoratShorts]

Your educational java video's are amazing and easy to understand😄

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[@prasannapadmagirwar6233]

Garbage collector story was very funny.. I literally laughed 😂😂😂

[@DurgaSoftwareSolutions]

Hello Prasanna, 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: Synchronization 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

[@steffy1496]

I'm becoming a fan of yours. I liked your way of teaching. You just make complex concepts easy and simple. keep up this awesome way of teaching ... Kudos to you

[@DurgaSoftwareSolutions]

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[@coolprashantmailbox]

awesome video for hashmap.it is too better than any other videos of hashmap

[@TheIndianVCC]

At 33:00 ,All students were thinking Sir was being sarcastic for " WeakHashMap" being weaker than HashMap, that's why they laugh. Even I too laughed. Great teacher hs really is.🙏

[@DurgaSoftwareSolutions]

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[@vandanaingole4057]

excellent teaching skill. we all like u teaching method.please cover all topic of java. so that we will learn java from u side. god bless u sir u doing very good job.please keep it up.thank u for explain each and every concept indetails

[@DurgaSoftwareSolutions]

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[@nikitaisrani9154]

sir this session was awesome and the best part was GC dancing in front of object and object started crying and hashmap came like "oooooyyyeee why are you crying " and gave gc left and right was hilarious moment .....:)

[@arun7787]

Hatsoff sir. No one can beat your explanations.

[@DurgaSoftwareSolutions]

Hi Arun. Thank you very much for your feedback

[@abhilashkokkonda1713]

Awesome.. This was an interview question for me.

[@utsavmodh9698]

hats off for durga sir 🎉🙏🏻

[@DurgaSoftwareSolutions]

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[@sumeetadhav6603]

Really awesome teaching skills sir, High respect,

[@DurgaSoftwareSolutions]

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[@EngineerVaibhav]

147 video completed❤🎉

[@ranveervaghela7030]

Completed watching on Oct 10, 2024 at 01.00 AM :) :)

[@flaviusflavius2991]

You are great !!! GC explanation was incredible !!!!

[@DurgaSoftwareSolutions]

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[@mokshadanayak9182]

Very nice explained with a funny example... Sir you are great.. Thanks for sharing

[@DurgaSoftwareSolutions]

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[@thakurramya5518]

Spr explaination sir 🤗 really I never forget that GC explaination 😂

[@DurgaSoftwareSolutions]

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[@subhakar9015]

Happy Teachers day sir💐💐💐

[@nehemiahdaniel4654]

Spectacular tutorials Sir..... Lots of thanks to you.. Subject in a funny way

[@DurgaSoftwareSolutions]

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[@thekidcook4015]

Nice story of weakHashmap

[@DurgaSoftwareSolutions]

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[@mdafzal4239]

Superb fantastic ❤

[@DurgaSoftwareSolutions]

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[@Akshay5022]

Sir you're awesome :) Hilarious explanation (Hashmap giving left & right to GC :D )

[@arishashukla9348]

Sir ...your examples are really awesome I can't stop laughing after listening your examples GC Vs hash map & GC Vs weak hash map😆...really I never forget this example ...Thank you for clearing my concepts.

[@DurgaSoftwareSolutions]

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[@yogeshnaik2674]

Such a wonderful explanation. #Respect

[@KuldipGhotane]

I think I will never forget hashmap, weakhashmap and gc relation

[@rahulchowdhury4227]

HashMap will give left and right to the Garbage Collector :3

[@archie5766]

love the way you teach sir #respect

[@DurgaSoftwareSolutions]

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[@shahzaiblashari7250]

just awesome lecture

[@rexsam3134]

U can open a training center in Mumbai Thane

[@keertijss18]

Thanks sir. Excellent explaination

[@DurgaSoftwareSolutions]

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[@kamal__jassal]

He's simply a genious! #Respect

[@top5things968]

Thank you sir .

[@mantelingar3074]

Hi sir, you have explained well the concept of a map but why are you not telling the details of how HashMap, LinkedHashMap, and TreeMap storing and retrieval of an object internally. If you explain those as well it will be awesome otherwise in interview no use everybody asking internal working story

[@heroicrhythms8302]

thats entirely a different story to know, you should learn dataStructures for that, which is not in the scope of these video lectures.

[@kamalapuramsivasankar7]

Thanks sir..

[@srinivaspothula6204]

Industry lo pawankalyan teaching lo durga sir

[@meghasandesam]

Super explanation sir...very hilarious way... pity GC..it is also crying infront of JVM

[@DurgaSoftwareSolutions]

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[@meghasandesam]

Durga Sir Thank you for giving the life for us...

[@dhanushsivajaya1356]

Thankyou sir

[@swaroopaswaru9135]

Lol 😂 couldn’t stop laughing for gc example , awesome explanation tq durga sir👌👌

[@DurgaSoftwareSolutions]

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[@vijay_kalyan143]

sir u made my life easier....

[@ankitasharma8444]

sir u are great i will never forget topics i learn from your video i wish i would have attended your live class #the_bestteacher_of_java_fr_me

[@DurgaSoftwareSolutions]

Hi Ankita. Thank you very much for your feedback

[@farahuzma3920]

sir..!! u are awesome

[@varundhamija4130]

Best GC explanation......

[@tejeswarpala2841]

when identithy hashma has duplicate keys . what will be the output of get(10) ? i tried adding the same but its considering as dupilcate and updating the existing entry. (java 16).

[@DurgaSoftwareSolutions]

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

[@harikrishnathariboyina6005]

Just simply super 1:)

[@DurgaSoftwareSolutions]

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[@surajbhushanpandey2882]

Hi @Durga Sir, which is better in real world, HashMap or IdentityHashMap ?

[@DurgaSoftwareSolutions]

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

[@rizwanshahid1447]

Thanks so much, Durga Sir.

[@remeshkumar7612]

GC dancing in front of Object so funny WeakHashMap < GC < HashMap in terms of Strength...

[@lorinamohanty2237]

Awesome

[@vipularya4529]

hats off to you #respect

[@DurgaSoftwareSolutions]

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[@dinkarinjosh]

Is there a use of weakhashmap in modern java? when finalize() is deprecated?

[@DurgaSoftwareSolutions]

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

[@vigneshkrishnan5064]

U rock Durga

[@lorinamohanty2237]

He is Awesome and genius.

[@zavisoft3458]

The first example is wrong by durga sir Integer i1 =new Integer(10); Integer i2 =new Integer(10); SOPL(l1==l2) ///true it will return true if we compare integer till 127 till that jvm will take it as premitive if we write value to 128 it will be consider as wraper class object

[@jvsnyc]

That is not correct. If we use the preferred Integer.valueOf( 10 ); then what you say is true. Calling new FORCES the jvm to create a new Integer object, whether it is needed or not. This is why use of it is deprecated in favor of Integer.valueOf( someInt );

[@vijay_kalyan143]

king of java

[@vineetkumar9371]

In linkedHashMap is there any concept of previous elements?

[@DurgaSoftwareSolutions]

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

[@mariajeraldin6712]

Great explanation :) . Can someone please let me know what will happen when the reference to 'Value' object is removed?

[@piyushpandey8509]

there is no reference concept for primitives.. if you are asking that....but if reference to any object is removed then it will be available for garbage collection

[@kailashjaiswal4126]

Sir you had overridden finalize method in the Temp class and only gave the sop statement but how it will be able to close all the connection of object ?

[@DurgaSoftwareSolutions]

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

[@rohittiwari9881]

Sir, you are irreplaceable.

[@nabilelassaad6086]

why we didnt get the old value in example m.put( i1, “Pavan” ) ; ? in minute 24:00 ??

[@shashankshekher3885]

Hi, Could you please upload another video explaining about Hash Collision in details. That would also be really helpful. TIA.

[@DurgaSoftwareSolutions]

Hi Shekar. Plz contact our online team [e-mail] or call us on this number [phone]

[@dipalisoniofficial]

Hello sir, When pawan is replaced with kalyan then it shud return the replaced value i.e. pawan in output..please clarify

[@DurgaSoftwareSolutions]

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

[@suneelsai9981]

when haspmap asks object why are you crying object said gc going to kill me then hm went to gc and gave left and right that moment i feel hasp map and durga both are powerful

[@suryasikharej8116]

Sir instead of using the reference variable t if we directly use new HashMap() as the key? I mean to say that if i write like this m.put(new Temp(),"Durga Sir"); what will happen? please clarify sir.. thanks a lot in advance

[@DurgaSoftwareSolutions]

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

[@rajatgoyal1491]

Is it cover the internal implementations of hashmap????

[@DurgaSoftwareSolutions]

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[@bharathkoneru4008]

Sir, At 13:15, you said equals() method, in general is meant for content comparison. But equals() method by default is meant for reference comparison. Right? the one that is coming from Object class.

[@bharathkoneru4008]

class Employee{ String name; int empId; Employee(String name, int empId){ this.name = name; this.empId = empId; } public String toString(){ return name+"-->"+empId; } } public class Test{ public static void main(String[] args){ Employee e1 = new Employee("Bharat",1); Employee e2 = new Employee("Bhag",3); Employee e3 = new Employee("Silk",2); Employee e4 = new Employee("Bugsy",4); Employee e5 = e1; //both are pointing to same object, references are equal. Employee e6 = new Employee("Bharat",1); HashMap m1 = new HashMap(); m1.put(e1,20); m1.put(e2,30); //e2.equals(e1) //This equals() method is coming from Object class as Employee(c) didn't override it. m1.put(e3,40); //e3.equals(e1), e3.equals(e2) m1.put(e4,50); m1.put(e5,60);//old replaced by new, e5.equals(e1) == true m1.put(e6,70); *//both e6 & e1 have same content but pointing to two different objects, yet the entry is added means it is not considered as duplicate, e6.equals(e1) == false as it is meant for reference comparison coming from Object(c) and is not overridden in Employee(c).* System.out.println(m1); } }

[@DurgaSoftwareSolutions]

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

[@shubhi2648]

Thanks for awesome video and in-depth explanation. I have one doubt: In case of WeakHashMap, if I make 'value' eligible for garbage collection in place of 'key', Object does not gets garbage collected... Why is this? import java.util.*; import java.lang.*; import java.io.*; class Codechef { public static void main (String[] args) throws java.lang.Exception { WeakHashMap m = new WeakHashMap(); Temp t = new Temp(); m.put("durga",t); System.out.println(m); t = null; System.gc(); Thread.sleep(3000); System.out.println(m); // your code goes here } } class Temp{ public String toString() { return("temp"); } public void finalize() { System.out.println("finalize executed"); } } Output: {durga=temp} {durga=temp}

[@sharadpandey4478]

shubhi I have also the same doubt did u got why value is not eligible for gc

[@shubhi2648]

No.. still didn't got it

[@avnish.dixit_]

The reason is that everything(Deletion, insertion) works on the basis of HashCode values of KEYS not "VALUES". First of all can you tell us what's the difference between your code and Mr. Durga's program.

[@vigneshkrishnan5064]

preping for an interview and just afraid that I will not say about the dance there ;-)

[@tallamhemanth3232]

in identity hash map what will happen if we print for d[10] sir. what will be the output kalyan or pawan

[@DurgaSoftwareSolutions]

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

[@abhishekmahajan1900]

Rule of map that is duplicates keys are not allowed is not followed by IdentityHashMap. Please some one explain me(32:37)

[@DurgaSoftwareSolutions]

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