How to Make an Object Immutable in Java | Common Interview Question

Learn how to make an immutable object in Java with the final keyword and access modifiers. We'll also look at the Java source code for Strings, which are very frequently used immutable objects. This is a pretty common technical interview question in Java interviews and after watching, you'll know how to answer it!

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What to learn how to code during quarantine? Sign up for LinkedIn Learning!

Courses on LinkedIn Learning!

Free Learning Java course

TikTok for programming tips on the go

Also check out...

Support me on Patreon!

Check out my Python Basics course on Highbrow!

Free HACKATHON MODE playlist:

MY FAVORITE THINGS:
Uber Invite Code: kathrynh1277ue
Postmates Invite Code: 7373F

Want to BINGE?? Check out these playlists...

[kalyan]

You're expertise not only in technical part, but also way of teaching! Thanks namastey 🙏

[tompov]

this is like the best explanation of all the ways and reasons to make something immutable. I wish more explanations were this well thought out and concise!

[pedrosechinato]

Simple but awesome ! Everyday I find something that helps me here. Thanks for the videos

[azeemrahman]

Precise and clear, can you make a video on how java is pass by value (example how Objects and arrays are pass hy value)

[nuhazainab]

Thank you so much for creating awesome learning videos🙏. I learned a lot from your 30 days of code playlist😃

[desigeekchishi]

Important concept gets asked in interviews

[kirankumar]

Great explanation.. I have also read that the class should be final if we want it to be immutable? Can you also explain if that's true..

[supun_sandaruwan]

This is a really good point. Thank you very much madam.😍😍🔥

[ammarif]

I'm new here
I love you Programing

[voidaspect]

Let's not forget that we can still change the values of the private final fields via reflection. So, if you want to have proper guarantees of immutability, you should configure the SecurityManager or use JPMS

[patrickordos]

That intellij dark theme tho, shweeet

[muditmathur]

1st Comment ❤
Thanks for the videos! They are very time efficient and helped me alot in my interviews.

[shivansh_saxena]

Hey i need a explanation on internal working of hashmap 😅

[kyle]

Nicely put🤙 you should really consider going onto Udemy

[baibhabdebnath]

String s = "hello";
s = "world";
System.out.println(s); //prints world
Why did this happen though String is immutable?

[cvxzlugynskii]

If I had a hawt programmar gf like this, I would start writing code in Assembly.

[Ilyas_Alrai]

Is that an accent? Why are you saying shtring instead of string with s not sh?
Iam new to english please teach me