05. How to create immutable class - Java Interview Questions

#java #interviewquestions #webencyclop

In this playlist I will try to cover all the important java interview questions along with answers in very intuitive, kind of pictorial/animated way.

Complete Playlist:

Next Video:

Video includes:
-- What is POJO and how getters and setters works.
-- Memory structure of while creating objects using constructors
-- What is immutable class or immutable object.
-- How to create immutable class.
-- What is use of final keyword in immutable class.

In this series we will be covering all Java interview questions and answers. This is going to be comprehensive list of Java interview questions which can help experienced Java developers to prepare for an interview as well as upskilling the Java knowledge.

I would always recommend everyone to watch Durga Sir (durgasoft) videos because of extensive in depth explaination on all topics if you have more time.
But here we will try to cover important aspects of Java Programming which are always asked in interviews withing less time.

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[shwetapanchal]

Very nice video .. I really understood this concept ✨ thanku sir

[bharathr]

Great explanation, I have referred many sites, ,,Its the best .

[AK-ttfc]

Wow ! Very helpful . Need more Java videos like dis . Do more videos.

[azizatoumi]

Thank you for this video, it really clarifies immutable class requirements .. please make more contents

[nvs]

I need more videos like this. Thanks so much.

[shivttripathhi]

Hi Ankit, Really awesome videos, watched all your 5 videos. Now, i am having much better understanding. Many Thanks Mate.

[nikhilbhangale]

you are simply great thanks so much for this of love.

[debkr]

You can also create an unmodifiable list in the constructor. Great video. I like your videos.

[shashankbt]

Excellent content 👌, why don't you teach whole Java course like this 👍

[rakeshhariborse]

hey ..awsome videos you have on please upload videos

[diwakar.singh_official]

Awesome content you created, please keep adding more content.. 🙏

[jeganmuthu]

Great Job, Your explanation is very great. Kindly make more videos

[paggybhangale]

youtube should improve its took almost one year to pop this channel. Nice explaination

[nancyreva]

Great explanation, can you upload hashmap vs concurrent hash map

[sagarmandave]

Nice explanation. Kindly create videos on java 8 features.

[kusumbhatt]

Excellent content... Please make some more videos on java interview questions.

[nilesh]

Hello, I think hobbyList would be persisted in a stack memory not in a heap memory since its reference of a List. Please correct me if I am wrong?

[ducklinglifejourney]

So final keyword is not mandatory for instance variable? As we already removed setters

[aniketbharsakale]

Qun1) At 6:38, you mentioned to create a new List inside Student constructor. This violates the basic meaning of a constructor. Constructor is only meant for initialisation of the class field attributes and nothing more. As per you that's true, by creating object inside a constructor u are able to prevent the mutation of that List & achieve immutabiity but you have compromised the meaning of constructor in the first place as per me, isn't it? Ankit.

Qun2)
Consider a class Customer which has following fields like (int id; String name; Address address;)
and class Address(int accountNumber;)

class Customer "has-a" relationship with class Account

So now how to make the Customer class immutable?
Yes, add final to customer class level, the add final to all mutable private fields, no setter methods.
Considering the above concern of not creating any objects in the target class constructor(Customer) ... How to handle that constructor issue if this constructor issue is considered?

[shubhamraj]

u said we use constructor for create an constructor is used to initialise an object na???