Equals and hashcode in Java Part 1 - How they impact Collections - IMPORTANT | Java9s

[@mistery4437]

శ్రీనివాస్ గారు, equals, hashCode మధ్య తేడాని బాగా వివరించారు. థ్యాంక్యూ ! Credit is where credit due.

[@java9s]

+Common Yunus thank you. Happy to see your comment

[@Adam-gp3ij]

Sir, this is insane ! thank you so much ! we pay a lot of Money without a 1% of these explanations in the university ! thank you again

[@niebboycyrax]

Really helpful, thank you sir.

[@AihQuresh]

Great explanation!

[@kumarshivam760]

Very informative video. Please make a video on hashcode implementation and ovveriding also.

[@text2564]

Very informative. Thanks

[@poornas9520]

great video but why do you hit your keyboard so hard?

[@sowmithgantla8674]

wonderful explanation.

[@naveenp4890]

Simple and Lucid explanation. Respects!

[@parthdalvi5855]

Nice Explanation !! :-) Thanks !! :-)

[@DeepakKumar-zk3dc]

As I know equals() method is used for content comparison while == is used to compare object address. That's why s.equals(s2) will generate true rather than false because content is same

[@DR-pi9vk]

it will return true when you compare these objects: Student s and Student s2 with equals, because they have the same object argument

[@jyotipalapure4623]

s.equals(s2) method will return true, not false.

[@MuthuKumar-qi2um]

good explanation

[@dips2805]

excellent explanation... please make a video on how to authenticate rest web services using OAuth and OAuth 2.

[@2010lakshitha]

thank you!!!

[@dhiru7853]

i have equals and hashcode methods when am tryin to give same values to 2 different objects and trying to do this obj1==obj2 its giving false but its giving true for (obj1.equals(obj2)) what should i do to get true for obj1==obj2????

[@sunilmaurya9086]

dhi ru == compares memory location just see if hashcode is correct

[@MrJonnis13]

Is it true that hashcode returns the memory location of the object, converted to an integer ? OR it returns something irrelevant of the memory location ?

[@java9s]

+Yiannis Ioannidis true.. Check the object class documentation here docs.oracle.com/javase/7/docs/api/java/lang/Object.html

[@MrJonnis13]

+java9s Thanks a lot for this, and for your effort making these videos in general !

[@PawanKumar-lf2cb]

class Equls { public static void main(String[] args) { String s1 = new String("hell55o"); String s2 = new String("hell55o"); System.out.println(s1.equals(s2)); } } i am confused :\ ? becons ans is true you are telling false :(

[@pjain7190]

Because String is predefined class having implemented Equals and HashCode function it.

[@DilipSirClass]

Yiannis Ioannidis in java there is no way to find out address.

[@krayziesensei]

Excellent explanation. Thank you, sir.

[@manideepreddygeetla3078]

What you said at 3.07 sec is false ,it returns true

[@djanupamdas]

Ultimate explanation..perfect coding pace..can you please create a playlist for Spring Core, Spring Mvc, Spring Boot..

[@prathameshrane2047]

Got It Clearly Now....

[@jaydipbarvaliya]

please come up with some diagram before handson! so learners easily grasp whatever you gonna do

[@DeepakKumar-zk3dc]

class EqualsMethod { public static void main(String[] args) { String s = new String("Deepak"); String s2 = new String("Deepak"); System.out.println("Equals method "+s.equals(s2)); // true System.out.println(s == s2); // false } }

[@sendacool88]

thank you for video . some time i saw number next hashcode like this one 97 * hash + Objects.hashCode(this.profileId); +

[@B-Billy]

Yes, that number is should be a PRIME NUMBER. Its used to calculate hash code for customized object. The number is useful because the aim of calculating of hash code is to get unique hash code for each and every object and here this PRIME NUMBER helps a lot.

[@DoomInSor]

thank yoooooooo

[@riteshsingh8813]

Could have been better if you would have explained the hierarchy how they are called along with purpose. You kept on repeating this is helpful rather than you should explain how it works.

[@bhanuchandar4419]

Sir u have to explain for every line why what and when u didn't follow please next time onwards try follow clear ur English nice but explanation need to clear

[@kamalraj-so5xm]

not clear explanation. not at all satisfied

[@vijaychaudhari1404]

not satisfy wrong explanation of equal method

[@subhasisroy4462]

Not at all clear with this video. Very theoratical