Java Stack + Heap with Reference & Instance Variables

[@NOCDIB]

In my 15 years of professional Java experience I must say that this is the best explanation I have ever seen of stack and heap memory. Great job!

[@Samad_27]

Is java is good to learn in 2021

[@NOCDIB]

@@Samad_27 Yes. Yes it is.

[@Samad_27]

@NOCDIB thanks but one more question how to improve programming skills

[@suyashgupta4019]

Brilliant video, couldn't have explained it any better!

[@israayusuf3712]

I saw your OOP videos first and I prayed God that I find some videos for the heap and stack that you explain. I can't tell you how happy I was when I found this video. THANKS A TON :")

[@imtihajlaskar]

Israa Yusuf

[@fer-torres]

Not everyone learns in the same way. But, your way of explaining this makes a lot of sense to me, thank you for sharing such valuable info here!!

[@Setofhornsandahalo]

Not all heroes wear capes!

[@shivamb-s8k]

I do!

[@skgyri]

Why this message here? Cant get it

[@abhishekbarman4327]

Not all heroes spell 'caps' correctly

[@semyonnaumov2664]

The greatest explanation I've ever seen. Thank you, Imtiaz!

[@thestarinthesky_]

You have done a good job on demystifying the whole terminology things! You should be a teacher! Thanks for the subtitles too. Very helpful!

[@kmellos]

He is a teacher. He has a course on udemy. Check the descriptions guys..

[@nishant2242]

the way you explain stuff is just amazing . Your udemy video on class design got me a job in a product company . thanks a ton

[@mrwalkan]

Explained Concisely. BRAVO!!

[@davitkvaratskhelia4033]

I'm going to repeat it step-by-step with my students.. Cool!

[@mostafaahmadi4998]

man, it was an incredible explanation with just a pen and whiteboard. Thank you

[@ehsansasanian9653]

This guy is really good at explaining, this is the best explanation I've ever seen of stack and heap memory. well done !

[@sobserve]

That guy born with a gift of knowledge transfer, man!

[@srinivasanbalan2469]

You are a God's gifted teacher to all students n professionals. Hats off! Imtiaz.

[@IkhsanNoorRosyidin]

Awesome explanation bro, your hand writing is not a problem at all.

[@gossipwithahmadsalar1208]

One of the Super Best explanations I have ever seen.

[@vishnupradeep3979]

I watch this every time, before I starting any new project.

[@RahulYadav-qg5ec]

Great explanation! BTW, String is also a class, so 'name' variable's data will also be stored on heap. (Like explained for Car)

[@salvatoreamaddio2983]

You should be teaching in schools, wonderful explanation

[@mr.yanlucena8463]

WTF! This is the best video I have ever, EVER, watched! Who is this genius?! I am subscribing right now! Thank you, Imtiaz!

[@MohdImran-rz9to]

Great explaination......thanx ...now m able to figure out what actually goes inside jre

[@amiladrck]

This is the best explanation I've ever seen about the stack and heap. Thank you so much!

[@monowarhossainshuvo9269]

With due respect, you deserve my like, comment and obviously subscribe. Thank you so much, sir.

[@brandonlovatt]

Imtiaz, I feel like sometimes I can hear your accent slip juuust a little. I can only imagine how hard it would was for to learn a language and really nail the accent in a clear, precise way for the native speakers you are teaching. Immense respect! Something I'm not sure I'd be capable of.

[@MJ-cf9nl]

And that was all what you got out of this video, right? his accent and when/how he slipped out. I hope that you paid attention and actually learned something from what he was actually explaining.

[@uyenchang9062]

@@MJ-cf9nl Can you chill maybe he's just a random stranger passing by and he's not even looking for learning stack and heap? You don't know for sure. Plus he's complementing Imtiaz anyway.

[@shashipagonda]

I went through multiple videos to understand stack and heap where there was some lagging but after seeing this video, it makes me clear. Thank you so much for explaining in detail

[@narikumar]

Excellent explanation, i loved it, thanks Imtiaz

[@aniruddhashahapurkar9244]

Hats off!! Brilliantly explained!!

[@SiddhantSaraf0]

Pretty good video. Thanks! But there are two important points you should've covered here: 1. Why does Java do this? I think the first question which comes to my mind is: why not store the objects on the stack too? 2. What happens when we call a method with arguments? For example, what happens when you call the method 'doWork' using that 'age' variable: doWork(age)? How do variables work then. Or if you call doWork with a reference variable, like myCar. Things get really interesting then :p Other things you could've mentioned, not necessarily though: 1. This is the right place for you to just give a quick mention of what a stacktrace is. That stack diagram with method frames is just begging for you to mention stacktraes in passing. :-) 2. For people who might have studied DSA, might be wondering: yes, that looks like a stack but why it that called a heap?

[@PandeyJii9632]

You have a weak mind. All the primitive variables and references put inside method including parametrs reserve place in stack inside method block

[@PandeyJii9632]

A ref variable can nvr call a method u fool. It is called by an object to which the ref var could ref to.it is done by instantiation.and then call the method by using dot operator.

[@garybrar5518]

@@PandeyJii9632 Him asking a question and giving possible feedback doesn't make him a fool or a weak mind. Get over yourself mate

[@Chungus581]

@@PandeyJii9632thinking curiosity is for people with weak minds is itself weak minded. Asking questions is one of the most important parts of learning

[@Adam-gp3ij]

Sir, I am completely shocked ! you are AMAZING ! thank you so much

[@bonishagarwal6315]

The best explanation I got for stack and heap memory. Thanks a lot sir.

[@30ynot]

Great video! Best explaination I have found, thank you!

[@snowwhite2146]

What can I say. You are very good at teaching! Thank you! I will definitely use your link to study more.

[@shanikayrs9116]

clear explanation Finally found something explain the Java concept with pleasant to listen English :) .

[@ivanh9567]

Imtiaz: * Shows how primitive type save in the heap * Me: "Cool, but what about class objec..." Imtiaz: * Explains about class object * Oh man, thanks you :)

[@abhishekshah11]

Clear and concise explanation. Very enjoyable!

[@marcus48134]

This is crystal clear and helpful. Thanks a lot.

[@DhundupTseringOfficial]

wow this made a lot of sense, very great explanation

[@pavantejavydhik7354]

Thanks much Imtiaz, this video will be like a dictionary for me , you clarified lots of doubts which persists in my mind since long time Its a appreciable attempt to put this huge insight in such a short vid

[@azharmobeen]

Very very well explained, Good job and please keep it up.

[@thestarinthesky_]

I REALLY need this video at this time!That is what I have been looking for !Thank you so much. it has been super helpful!I appreciate it

[@jeevansaimanikanta782]

Sir The explanation is superb and clear. I haven't seen this much clear explanation on Garbage Collection and Stack Vs Heap. Thank You so much. Please put Videos on REST API as well.

[@ashleytulloch812]

WOW Thank you so much - I'm brushing up on my explanations of Java for an interview next week and this was incredible!

[@joshuaealy3243]

Best code expositor on youtube!

[@maheshchoutkuri2214]

Hey Thanks a lot, I am searching a lot to find what happens when we create a variable , The best explanation which I found...

[@venkat757]

Nice bro.... Excellent explanation...

[@mahmoudnoor3117]

damn man you are so cool your English is fantastic even for those native English speakers continue your great job and please make new playlist tutorial

[@jithinjose9190]

You are awsome.....what a nice way of explanation..i love it...

[@MdWahidurRahmanOvi]

Glad that I found this video. I have seen videos on LinkedLearning(Linda.com) Udemy, college classes no one explains this properly it's been 2 + years and now for the first time it makes sense to me that what this heap and stack are all about.

[@maddcobra1]

Nice work! You are a good teacher.

[@chinmaysoni4416]

Very nice explanation!!

[@adriangeorgescu7395]

Very easy to understand tutorial. Thanks!

[@darkata40555]

Definitely the best explanation on youtube !!! Big thank you and subscribed ofc ;pp !!!

[@onkarvadagaonkar494]

Nice explaination, easy to understand

[@supernussknacker]

Very clear explanation. However you didn't mention in your first example (08:30) that String is a referenced Type. This could cause some confusion for viewers who could get the idea that the values of the String are stored on the Stack.

[@claudiajulietachen7905]

Very nice explanation! Understood all! Thank you!

[@incognito13567]

You are the best man and you have a very nice voice. Thanks for all! Subscribed!

[@madhuram6328]

Omg such a brilliant explanation explanation u deserve it 💯👍

[@bartballon6566]

you just saved my exam!

[@harshakada3374]

Great video, please do more of these videos

[@response2u]

Great video! Just a little point missing: Once bigEngine is defined in main() in the stack, it has to refer to an Engine () in the heap (that line is missing) Then my3Car.myEngine is set to bigEngine in the stack which is already referring to Engine in the heap.

[@hakanahlstrom8310]

My question is this: in order to create instances of a Car, there needs to be a class named Car.java. so, in order to create Engines, there needs to be a class named Enigne.java?

[@asthagarg4614]

Håkan Ahlström yes of course. Since it's not a built-in class, it's our custom class.

[@nasrinemami3237]

thanks for fluent and easy explanation

[@ShadabRezashad]

Very nice explained 👍👌

[@dheerajmantena3307]

awesome lecture....thanks much.....

[@ЮрийЛавринчук]

It's the best video about stack and heap. Thnak you!

[@rafaellalinde3154]

Great video! been looking for a good explanation for a while and finally found it.

[@saadiyafourie]

Very helpful, easy to understand and calm. Thank you very much sir.

[@philipgelinas]

Indian Mark Ruffalo! Thx man! Good teacher.

[@muhammadalirasuljonov799]

The best explanation , thank u

[@nymexe]

Finally understood 😄❤️

[@nikosc]

What if we create the Engine object inside the Car constructor or inside another Car method. Where will the engine reference variable be stored? In heap or stack?

[@bruceskellator]

Thanks for the awesome explanation with examples! :)

[@cm_kaya]

Two questions pop into my mind: - Are the methods in a class placed on the stack, or is there no connection with it? - What happens to static variables or methods? Is there any difference for them?

[@crazyprogrammer2795]

simply awesome keep up the great work sir

[@anantgarg1116]

Loved it Imtiaz Ahmad! Thanks for your efforts :)

[@dbvs007]

nice.. very clear and you are very confident on what you say :) appreciate it and thanks again....

[@asthagarg4614]

Nicely explained. But what about about static variables? And what if we write- car3.engine = new Engine(); Will this line create a reference in stack under the main() frame??

[@rohandrysdale1139]

Great vid. I appreciate the clarification.

[@RajeshKumar28sep]

Great work. I thought the stack grows downward.

[@ferasmasoud428]

Great job Imtiaz, Your explanation makes sense. But when I found your channel, I was looking for how to treat the static methods and polymorphim in memory, hope you can extend your explanation to accommodate these terminologies... Best Regards. Feras

[@mildtime1995]

How Garbage collector listens for free/Left objects in the heap ? How it computes which object is freed or needs to be removed ?

[@reversebitstech7395]

Simple and superb, Nice explanation. Keep it up Man!

[@vijayvaswani9717]

Very nicely explained..Thanks

[@vijayvaswani9717]

Where does variables gets value before and after object creation..? I find it difficult to understand

[@a.rohimsama7222]

Great explanation, Thank you.

[@TheParfaitducongo]

good job explaining brother. Nice and clear

[@prathameshrane2047]

Thanks for the detail explanation..

[@rohitsharma-xt8qe]

This is really some good stuff on KZbin 👌

[@rakeshanand2008]

Hi Imtiaz, @13:59 you said myCar will contain the address of new object in heap. Wouldn't that cause error duplicate variable?

[@apiautomationtester2567]

who decides what should go to stack and what should go to heap memory ? please post basics of stack and heap memory

[@brettpenza5149]

This is Great. Now perhaps you can explain how the String type fits into this. Is the String type considered a reference variable or a primitive style. Does the String variable contain a reference to the heap, or is it stored completely in the Stack along with method like a primitive? Thanks.

[@taqikhan5418]

zabardast,awsome ,enjoyed a lot. kaafi concepts hile hue the oop k mere tw

[@christopherhayward3078]

Thank you for the video. I have a question that applies around 13:45. Let's say you define Car yourCar = myCar; (can you do this...I think so) This means myCar and yourCar point to the same memory location in the heap, as in your diagram. If you now define myCar to be a new Car(), am I correct this moves the pointer of myCar to a new slot...again as done in your video, but leaves yourCar to be pointing at your old car? Now myCar and yourCar are different cars....I am sure hope I got this.

[@codingwithnida]

The best Explanation..

[@djordje0000]

Great video, perfectly clear!

[@heayyyyyyy11]

Helps me so much. Thanks you

[@saeedmirzaei1]

Great job. Thanks so much.

[@halamercy8594]

It's like listing to music not java😂😜 Ur explanation is far excellent 👌 Thank you

[@COSMOPOLITANWORLD]

Thanks a lot for this great video! very understandable!

[@ZhaoShuaihu]

I think he missed something for understanding simplicity. Runtime area includes code area(class area, or metaspace), heap (variables), stack(function calls), PC (store instructions), and native stack areas (call c/c++ library). And an exception for ByteBuffer, which gc doesn't manage.

[@psawyer871]

Hats off to you, Jedi master!

[@napowik2018]

The difficulity of Java only in your mindset is lying my young Jedi xDDD

[@hannahlee1500]

This was amazing. Thank you.