Array vs. ArrayList in Java Tutorial - What's The Difference?

Arrays vs. ArrayLists - What's the difference? How do you use each of them, and which one should you use and why?
We'll go in-depth about the similarities and differences between Array and ArrayList in Java, and talk about how to create them, add elements, remove elements, and more.
This is a beginner friendly beginner's Java coding lesson tutorial, where we'll talk all about using Arrays and ArrayLists.
Learn or improve your Java by watching it being coded live!
Hey, I'm John! I'm a Lead Java Software Engineer who has been in the industry for over a decade. I love sharing what I've learned over the years in a way that's understandable.
Let me know what else you'd like to see!
Links to any stuff in this description are affiliate links, so if you buy a product through those links I may earn a small commission.
📕 THE best book to learn Java, Effective Java by Joshua Bloch
amzn.to/36AfdUu
📕 One of my favorite programming books, Clean Code by Robert Martin
amzn.to/3GTPVhf
🎧 Or get the audio version of Clean Code for FREE here with an Audible free trial
www.audibletrial.com/johnclean...
🖥️Standing desk brand I use for recording (get a code for $30 off through this link!)
bit.ly/3QPNGko
📹Phone I use for recording:
amzn.to/3HepYJu
🎙️Microphone I use (classy, I know):
amzn.to/3AYGdbz
Donate with PayPal (Thank you so much!)
www.paypal.com/donate/?hosted...
☕Complete Java course:
codingwithjohn.thinkific.com/...
codingwithjohn.com
Full source code available here: codingwithjohn.com/array-vs-a...

[@whatisahandleeee]

Easily top 3 programming teachers on youtube. No joke. You seem to answer the exact questions that a newbie would asks and you answer in such a way that gives exactly the information that is needed.

[@ilhammammadli4560]

who is rest?

[@whatisahandleeee]

@@ilhammammadli4560 Corey Schafer is one of them for sure.

[@sophie6425]

Agreed! I´m a first semester Computer Science student and we must do these little coding exercises. The lectures don´t really help, but these videos really got me through these tasks.

[@glefordbanglayan5322]

PLEASE DONT STOP TEACHING THIS THINGS.. I HAVE WATCHED A LOT OF GUYS LIKE U ON KZbin AND UR ONE OF THE BEST. AND STILL I LOVE JAVA MORE EVEN AFTER MEETING PYTHON

[@trynafindkaygee_]

i can relate to that❤😎👌

[@spacepowerofficial1187]

I didn't see the DONT and I got really confused

[@butterandjamtoast]

Caps Lock. The cruise control to cool 😎

[@user-pp1cn2ut4y]

Axper angleren chem xosum ches kara bacatres incha patmum?

[@darrenfrancis8126]

@@spacepowerofficial1187 PLEASE STOP TEACHING imagine

[@sanabil2531]

you are going to have million subscribers one day, already telling ya, you teach so well :)

[@wankhede09]

I Second that

[@CheeseStickzZ]

That's a nice notion but no he wont. Programming is not that popular. Only stupid things are popular, entertainment and food and monkeying around

[@alicewu6674]

I agree... he is great teacher, I love his coding tutorials cuz they are the ones that are among the most understandable and well-explained:)

[@renathanobre]

indeed

[@MakeItStik]

He is close

[@kerwinso]

You explain diamond operators (starting at 4:19) in 20 seconds better than others who have taken over 5 minutes. Well done sir.

[@shirinelmanson7839]

I am literally I am shocked how come you do not have 1 million subscribes ..the way you teach is awsome.

[@thecolorblue7427]

I was not expecting such a easy to understand, and great tutorial like this! thank you so much

[@aces8481]

you are 100% my go to person on KZbin for beginner tutorials -> explanations are always really beginner friendly and so clear and easily digestible. Thanks a ton man

[@filipemelo1107]

I freaking love the way you approach the subject on your videos... It's so simple and yet, complete; I can understand everything so easily.

[@oldschoolmath8480]

Thanks so much for sharing this video! We watched this in my AP CS A course after finishing a unit on Arrays and you did a great job of giving us an intro to ArrayLists.

[@tbone587]

I been using java for over a decade and I have still been enjoying your videos! You explain things very well and even these basic concepts are engaging to watch lol

[@miigon9117]

Cool video. So informative yet so clear and easy to understand. I’m learning java programming as a hobby language and your explanation is the best I have seen on KZbin!!!

[@StephenMoreira]

I've been out of the Java Ecosystem for years, but I randomly got to your channel I have been enjoying just listening on some of the details of Java again. Great content.

[@robertjr8205]

Watching your videos helps me understand so much better. You explain everything perfectly and add in the little important details that most books or instructors seem to not mention, Thank you!

[@osanbrazil999]

You're the best because you speak fast and get direct to the point with the exact needed amount of information, period.

[@gabrielmicillo7763]

This channel and its content its excellent.. im learning Java and I found it so much easier with these videos than my actual lectures. Also the edition of these videos is great. Please dont ever stop making videos about Java. I honestly think is by far the best there is on youtube, and all divided on little videos so it doesnt feel overwhelming like starting a new course.

[@anityyu]

I love how my school explains these things in 10 videos and it takes over 5 hours to watch all of them, while I can easily learn it from your video in just 18 min

[@jaspersumugat6951]

Such a lifesaver, I'm currently working for our activity involving arrays and this video showed up. Very informative, no subtle introduction just worth of my remaining time haha. Thank you so much!

[@tinongsot6267]

This channel is really underrated, I learned a lot just from this video. You’re doing great. Thank you John

[@SophoniasT]

My first video and I just want to say that please keep going. This helped me in so many ways. Easy to understand explanation and very helpful interaction. God bless you. You have a subscriber! 🙏🏽👏🏾👏🏾👏🏾👏🏾👏🏾

[@akshatmehra3951]

Awesome ! Learning java, coming from c++ and js background. This man has taught so much stuff so easily and quickly. Thanks a ton John !

[@danielbressner6125]

Yet another great walkthrough. This channel has been such a huge help in my own Java journey.

[@barnabastyav3575]

this is the best java tutorial i have ever watch , i wish John had a complete series from the basics up, i can beat my chest and say i understand the differences between Arrays and Array list, I recommend it for anyone looking up the internet for answers to arrays and array list

[@preciouspearl8583]

Thumbs up i searched so many tutorials but find yours the straight to the point one

[@michaelekpo4011]

Thanks Coding with John! One of the best videos I've seen throwing so much light on this subject.

[@carlosgranda8493]

Dude, I swear to God how can you explain so well that I didn't get distracted. bro when my teachers explain I lose focus so fast, dude keep it going you are amazing.

[@mk17173n]

This dude is the man. His videos are better than others because he answers the question why. Why do we do it this way? Keep it up dude.

[@eddyvlogss]

Awesome way of teaching John.. please don't stop teaching at any cost. This really helps a lot of people !! you deserve more subscribers

[@masikajenniffer6473]

This is amazing.The explanation is really easy to follow and understand. I hope many more people can watch and subscribe. Thanks for the tutorial

[@Charnelex]

John, I'm just getting started in Java and I appreciate you. Commenting to help the algorithm.

[@wayneinteressierts9973]

Man, John! Thank you so much! I‘m about to start my first developer job and see your videos daily! You are so great help!!! Please keep going!

[@Timeless_Trader]

Thanks John. This is a great learning. I would recommend this channel to my friends too because things explained are to the point, no random things. Thanks again. Subscribed

[@HuwJones]

Great video. Two things....it's considered good practice to use the interface on the left side so List instead of ArrayList before the variable name. And while you are right that the ArrayList itself can grow and shrink it's really important to be aware that the array that backs the ArrayList (yes there's an array hiding inside the ArrayList implementation!) does not shrink automatically after the ArrayList has grown...this can be very significant when profiling the memory footprint of an application. Lastly, it would be really good to have a video on why you'd pick a primitive representation over its Object form.....performance, memory usage, etc.

[@ralphgore3543]

John, I discovered you yesterday and you are one of the best!

[@keremgobekcioglu4686]

Liked this video , John. I have started to code in Java , after 1.5 year with C and C++. Now i'm learning some differences from you. Keep up.

[@banglepq]

Thank you John so much for this video. It's really helpful for me to understand differences between array and arraylist.

[@mastermatt6090]

Thanks dude, you make everything so simple!

[@vishnuvinod8738]

Your are awesome man ❤️ You teach so nice. You are adding every information about the topic into a single video. And also videos are not too lengthy. Loved to watch every videos you posted. Don't stop please.

[@CoolBear619]

Thanks much John! Because of you I have cracked 2 interviews. Loads of love from India. Keep teaching us!🎉

[@TornadoeJoe]

Thanks for the help! Java is an interesting language so far, and this definitely helped me see things a bit better.

[@raba650]

What a great walkthrough! Really enjoyed it. Now to binge on some more of your videos :)

[@anddavinci6691]

Thank you so much! I’ve been learning so much faster since I have started watching your videos.

[@erickferraz5529]

Dude, thanks a lot. I’m from Brazil and just had 3 hours of class in my own language and couldn’t get what I got in 17 min in your video. U r a legend.

[@matiasmoresi5040]

Hey John! Thank you very much for taking the time to teach like this

[@bbalmer7878]

as I was watching I thought "BUT-BUT you cant DO THAT!" and then you wrote "//you can't do that " and i got just a nice ass dopamine hit, thank you.

[@malodeity]

I'll be the first to admit that I've been all over KZbin but you different and you make it so easier to understand. Thanks

[@AdrianTregoning]

Absolute gold. Very well explained! Thank you John.

[@mohamedmada4159]

Glad that you've mentioned that ArrayList do so much behind the scenes, I'd have loved to see you go more in depth regarding the difference in speed and how they really work at a lower level, But again as you said the difference between both is barely noticeable. Thanx dude keep at it

[@EnfalOlgun]

What a beautiful explanation. Stunning, absolutely stunning. Thank a lot John.

[@fridolinmeier661]

Just searched for a good video and wow I could not have found a better one. Thanks a lot.

[@MuniraHersi]

Thank you so much for all of your videos. You got a new follower, and you are really good at explaining java. Hope to see your channel grow!!!

[@AnaCristina-ve7wh]

Thanks, you're a great teacher!! It's incredible how you can make it so easy to understand

[@sajidamoin771]

You are one of the smartest teachers on youtube… I love your teaching style…Whenever I want to learn a java topic, I first search it on your channel because you explain every topic in a very simple way. Not too much of information not too less… just as much as needed for a beginner… My favorite ❤️

[@abdullahpopalzai6543]

Please do not stop teaching, you are great!!!!!!

[@charmainemarasigan8994]

Superb training. Not boring! Very educational! Highly recommended

[@footballplayer3195]

you are my hero man, I've been using fixed array my whole life, you're best than my professors in college

[@maryozonkwor-ei8vw]

Just what i am looking for. And u explain like swift and smooth . Tnx

[@alessioharo7995]

You're such a great teacher. Thank you for what you do! I love your videos

[@AsrorkhanProgrammer]

In a simple case, a and very understandable prepared lesson Thank you, John

[@jordans3611]

Keep this up man, your videos are helping me so much!

[@sdaltnts6774]

Thank you very much John. You explained clearly. I love your channel.

[@lootster]

KZbin algo sucks for not recommending this wonderful video for Java learner! But better late than never!

[@patrykgwardzik4509]

Man i just love you so much. This is so clear and understandable.

[@Av-fn5wx]

Brilliantly explanation. Clear and concise ❤

[@justinbanza4751]

I really appreciated this video. Thanks for all the work to make it!

[@daniella9498]

I'm using these videos to prepare for my first year Java course. Thank you so much!

[@qararander]

Thanks. Your lessons are great. You simplify matters, you consider students cognition over showing your talent, which you undoubtedly have. Some teachers focus on proving their excellence more than a student’s need, level and ability.

[@HatTrick4030]

Awesome!! as a refresher I alwasy have to come back and re-study the already-studied topics. Thanks for this great video

[@saudaminisawant961]

Excellent explanation of concepts ....great John

[@javierherrero7011]

John, you are an excellent excellent teacher....I have seen many of your Java videos, always learn fast and solid

[@s6031417]

This video took me only 17 mins to get fully understand the basic concept of Array and ArrayList. Thank you.

[@jorgegutierrez2100]

Quality content, great at teaching, quality video and the most important for me is that as a non native English speaker I can perfectly understand everything you're saying. This channel deserves at least 1 million subscribers and hundreds of thousands views. Keep it up, man. 🥂

[@nathanelliott9729]

Thank you so much, I learned more from this video than a 2 hour lecture from my professor.

[@PCRduino]

Brilliant and clear explanation! Thanks!

[@valerietremblay3235]

Thank you so much for these clear & concise videos!

[@user-ur3gr2qs6i]

Thanks for the videos, they are really easy to follow. Great for review of core concepts as well as an intro for those just learning Java, you and Carl do good work!

[@CodingWithJohn]

I get lots of help from Carl and the cats

[@NajmaMiah]

Great explanation! Thank you. Please keep posting

[@kuldeepjoshi1]

Great job John!!! Keep it up!

[@SkyeVintorez]

i love all your videos! it helps a lot and explained very well.. please keep on making videos about java..

[@moabdellatif5699]

just perfect and simple, thank you John

[@aadi.p4159]

clean precise and too the point.. big ups bro

[@nicholi8933]

This was super useful. I was forced to use an arraylist in this program and everything I was doing was not working. Though mine is a bit different since they are class objects, I figured it out with your help. Thank you so much. Arraylist remind me of arrays in python.

[@donnamadelene4594]

i love how you explained this rn and em crying co'z I really don't understand it at first. so yeah thank you so much john.

[@FelipeGomesProfessor]

Great content!! Really easy to understand for a beginner. Thanks!

[@laymanshow79]

Love the practical way you teach

[@darthvasilis]

Amazing. In 15 minutes I've learned more from you than I have in 10 weeks from my CSC205 professor...

[@williamowusu7778]

Very helpful and easy to comprehend

[@sambhavkumath]

thanks for making such an awesome lecture. hoping for more such tutorials

[@xiaoxiao717]

Very clear and detail, it really helps a lot! Will subscribe and hope to see more videos soon!

[@pezeng]

Your video was so easy for learning, Please keep doing this. it help me a lot in java learning

[@mariacunha8508]

Really enjoying your videos!!! Keep it up!! Thank you!!!!

[@rashmikadeshan2710]

Thank you so much for making video like this. You explained the difference between arrays and arrylist very clearly .therefore i could understand it. keep up th good work.❤️

[@emma98800]

Hey! you are one of the best teachers! Please keep up doing your good work sir!

[@minakianrad812]

Thank you for this AWESOME video of the differences between arrays and arraysList. !!!! You explained it very clearly, down to the point, with great examples!!!! Thank you for making this video and sharing your knowledge and expertise with the world. You are Outstanding! Thanks again! And you also got a new subscriber! 🙂

[@saronabi1387]

Thank you ,thank you, thank youuu, ur courses are so special, so easy to understand the concepts, thank you so much.

[@ikromovich_b]

you are an awesome man. i got a lot of things from this lesson and thank you for lessons👍

[@sebastianyepez6204]

Loved the video. Super informative!

[@AngaarUriakhil]

Thanks. Very clear and easy to understand.

[@stephenfoster9009]

I’m new to Java and need to learn for my job. Thanks for the videos!

[@kocovali7295]

my english its not so good, but you speak so clearly so nice i understand everything in your videos. As an Java beginner i am very very thankfull to you!

[@alexbrun6863]

Great video! Explains so good.