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

equals and hashCode methods implementation in the data objects is extremely important when the application creates and hold data obtained from the database or from any source. It is important that applications does not maintain the redundant information as part of the objects which eat the memory as well as impact the performance of collections and sometime even functioning of collections is directly dependent on these methods.
So, in this video i have explained the importance of overriding equals and hashcode methods and also demonstrated how they impact the performance of the collections.

[mistery]

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

[Adam-gpij]

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

[jyotipalapure]

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

[DeepakKumar-zkdc]

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-pivk]

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

[kumarshivam]

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

[dhiru]

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????

[poornas]

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

[DeepakKumar-zkdc]

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

}
}

[manideepreddygeetla]

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

[jaydipbarvaliya]

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

[dips]

excellent explanation...

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

[MrJonnis]

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 ?

[naveenp]

Simple and Lucid explanation. Respects!

[djanupamdas]

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

[sendacool]

thank you for video . some time i saw number next hashcode like this one 97 * hash + +

[krayziesensei]

Excellent explanation. Thank you, sir.

[bhanuchandar]

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

[qwbecqbcQS]

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.

[kamalraj-soxm]

not clear explanation. not at all satisfied