How does ArrayList work internally | Source code walkthrough | Array vs ArrayList vs LinkedList

Hi ,

In today's video, we have covered from scratch all the things you need to know about ArrayList.

So, whether you are new to this or want to revisit the concepts, this would be a great refresher video. Moreover, you can get to know what happens when we add elements to an ArrayList and why is it dynamically resizable?

What have we covered in this video:

1. Overview
2. Hierarchy & Initialization
3. Time complexities of all operations
4. Array vs ArrayList vs LinkedList
5. Source code walkthrough
6. Follow-up questions

#arraylist #collectionframework #javacollections

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Created and Instructed by:
Varsha Das
Senior Software Development Engineer(Manager) & Content Creator of @Code With Ease - By Varsha

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[RavishaSharma-kp]

Please create another video on internal working of Linked List too. This one was great and to the point. 😍

[pushpendrasingh-xwrr]

one of the great playlist . u can crack any interview . thanks

[shantahiremath]

Thank you so much for the best explanation .

[girishanker]

One question. When a new copy of ArrayList is added. What will happen to the old ArrayList? Will it be removed by the garbage collector as it is no longer being referenced?

[grsivaranjani]

video was on point with good explanation

[ashutoshchaurasia]

If an arrylist size increases by 1.5x then it increases its size by 50% only right not 150%.

[sarthakjena]

very good explanation, can you share notes please.

[__nitinkumar__]

Just a feedback, I have been trying to watch your videos. It's so confusing to understand. It seem like its a continuation of some previous video and I fell so lost.
It's better to starting with intro, rather than a topic, and having the intro so late.
Just a constructive feedback. or put a timer that real video starts in xyz seconds, something like that.