Man, I have already watched this video like 5 times and I keep coming back to refresh. Kudos

0:49 Edit .java -> compile .java -> run .class 3:33 JVM breakdown 4:14 Class loader: load (bootstrap (rt.jar), extension (jre/lib/ext), application (classes we write)) 6:59 Class loader: link (verify bytecode, prepare memory allocation for static variables, resolve nested references of a class) 10:02 Class loader: initialize (of static variables, static blocks) 11:09 ClassNotFoundException and ClassDefNotFoundException 12:38 Runtime Data area 13:01 Method Area / Permgen space / Metaspace (class data like static variables) 16:16 Heap (object data) 17:41 Program Counter Register: pointer to next instruction to be executed per thread 18:35 Java Stacks: stack frame of currently running method per thread 20:16 Native method stack: for running non-java methods called from java methods running in Java Stack (per thread) 24:09 Execution engine: GHIJ (Garbage Collector, Hotspot Profiler, Interpreter, JOT Compiler) 24:26 Interprets and executes the bytecode/instruction 25:52 JIT Compiler: Bytecodes that are repeated, called hotspots, are saved from re-interpretation. On the fly compiles them and make them ready for execution 26:27: Hotspot Profiler: graphically analyses the all the bytecodes and helps JIT compiler 27:36 Recap 26:57 Garbage Collector: cleans up unused classes, objects and memory areas.

Great tutorial man~ Best thing I've ever found to have JVM explained so clearly in such a simple way.

Sir, Thank you for sharing your deep insight on this subject. After several years of struggling through understanding JVM concepts, this video today has finally helped me!!!

This is still great after 5+ years. The Bootstrap loading is somewhat different in the most recent versions of Java, they broke up rt.jar into modules which aren't covered here because they didn't exist back in Java 8...

Hi Ranjith this the most absolute extent about internal working of JVM.. Your work is reverence.. Such a deep & cultured explanation on JVM.. Generally, I never write on anything but your video convinced me to share my thoughts.. Great work, it's too helpful..

Excellent presention Mr. Ramachandran.. Exactly what i was looking for. Thanks again n again.!

Wow this is perfect, thank you so much for this I am definitely subscribing, such quality. I can't wait to binge watch all your videos!

An excellent, detailed, on-point overview of the JVM. Great work!

despite slightly outdated it's one of the best videos I've went through, perfect to start with

Thanks for this video, I cleared 3 rounds of interview and got rejected in the final round because I couldnt explain memory management in jvm yes companies in india do ask about jvm.this video will help me for my next interview.

I'm so impressed. An in-depth and crisp architectural overview. Keep doin' the great work!

Wonderful. What a explaination. All and all, perfect. That helped me a lot understanding the actual JVM, one of the areas on which i have been working since several years now

This is the best explanation I've seen on this topic so far! Huge thanks to you!

Matter of fact, to know how jvm works is terrifically important, this topic hasn't been covered enough though unlike all other fancy stuff. Thumbs up!

Thanks Ranjith! This is one of the best presentations (in any area) that I have seen! You avoid mistakes that many technicians do when they present. Masterful!

Excellent video... never seen a better one on JVM. Thanks a lot!

Clear explanation of each step with enough time spent through every important point! Very helpful , Thank you, Hope to see more videos coming through.

Perfect! I regret having a look at this video after going through some interviews...nevertheless glad to have such a detailed yet well summarized information explained so smoothly :) looking forward to watch many of your videos and learn..Thank you!!!

Excellent way to simplify such a vast topic. Very good explanation, to be understood by even a Lehman. Great Job! Thanks much!

Thank you for excellent explanation. You articulated lecture about JVM in proper format and lucidly which helps us to understand what exactly JVM does under the hood. Loved your session.

I happened to find this by chance. Awesome work, Ranjith!

One amazing tutorial and very well explained. Thank You!

thank you very much for your great explanation it has been very useful to understand how JVM works. congratulations for your video.

I enjoy your tutorials because you always go into depth and everything you say makes sense. Hence why i have subscribed.

Simple words explained very complicated architecture. Thanks for your good effort. Keep going. We are now big fan of your videos.

Great video ,now its much easier to learn more about JVM .

Awesome, beautifully and crisply explained. Thanks so much.

couldn't ask for ymore simpler way.. you are a life savor.. thanks man!!

Awesome presentation with all the images. Thanks and awaiting more of your videos.

It's really cool... Thanks a lot for your effort! Your approach is also great.

Very well explained. Thanks for creating and sharing the Video.

Best explanation of JVM I got till now. Awesome work. :)

Very simple, nice and easily understandable... thanks for sharing.

Best video on JVM. I am subscribing you right away :)

Very good explanation! I liked all of the simple visuals. Thank you.

Many Thanks from Kenya

I like the way u teach. Clean and Simple. Best way to learn Thank you

Brilliant... 1st place where I found the understanding of JVM !! Very good Bro.

Thanks Ranjith for the detailed explanation. Appreciate it.

Wow, Awesome man. Always you are explaining in depth concepts. First I saw the HashMap and now JVM. I am confident enough to showcase that I am having complete knowledge about this concept.

Well Explained in a simple way, I have understood now how JVM is working. Thanks a lot.

Great explaination of JVM architecture. Diagram also looks familiar to me from "Inside java virtual machine." I was in need of this video.

the best video and best explanation on JVM i've watched so far... you are a great teacher dude... thanks

That was good presentation. Appreciate you taking the effort to share it with us. Thanks

Thanks so much for this video. It is a great overview of the JVM. It really helped clear up some of my basic questions.

Perfect. Excellent.One of my very successful searches till date. Thank you very much.

It helped me to understand a pretty well about the JVM Architecture .its simple,clean and crispy explanation . Thanks you.

great tutorial.. explained every detail.

This is probably one of best way to explain. Thanks Ranjit. Along with the explanation, Ranjit has covered many troubleshooting areas that is a practically relating us to understand better. This is the Best part of video.

Thanks a lot for such a crystal clear explanation of JVM and it's execution

Excellent and very helpful to explore lot about JVM. Thanks.

Excellent!!!! thanks much for such a careful and detailed session.

Very Nice video! Explained everything, what I was looking for. Great!

Amazingly informative.....Great Explanation...Thank You.

Great video, great lesson! Thank you.

One of the best videos with clear explanation. Helps me understand the basics. Thank you for making this video. Its really helpful! Good work...

Excellent tutorial to understand JVM arch. Thanks!

Thanks a lot, it helped understanding the JVM

Excellent video, Thanks!

Great work! Thanks for doing this.

You are the best Java tutor I have come across in my 18 years of Java experience! Thank you!

The best explanation of JVM I ever heard.

Phenomenal explanation !! Investing 30 min in this video, will keep this knowledge for ages in my head. Thank you.

Awesome video Ranjit. Increased my clarity on JVM architecture . Many thanks! ☺️ 👍💐

Thanks Ranjith. Quite clear and in-depth explanation.

I liked the presentation.

Thanks a lot. Very informative. One of the best videos on JVM.

Lovely Presentation with key points of the JVM architecture.

Thanks Ranjith, for taking the time to explain an overview of JVM. Made a lot of concepts clear. Please keep posting such videos :)

The detail in explanation was no-less than perfect ... Reference invoking with class and study materials -Thanks

excellent presentation and explanation. thank you very much for the lesson.

Very valuable video, thank you

Amazing tutorial , sir . Thanks for sharing your knowledge.

Simple and clean, thanks for creating this video :)

Asweome learning videos Bro! Keep rocking!

Excellent tutorial. Subscribed.

Awesome my dear friend. Explained with proper diagrams in a very easy way. God Bless You!

Thats a beautiful one. Thanks a lot for your time and effort!

It's amazing tutorial and great explanation

Excellent tutorial .... haven't come across something so comprehensive on JVM so far

Excellent video on the internal structure and workings of jvm. Thanks a lot

Thanks A lot Ranjith for Simple and Clear explanation! Keep up your good work.

Very resourceful and well explained !!!

Thank you for this great tutorial!

hi super video ranjith. Clear pictorial representation with wise choice of colors, good english , concepts are well defined and revised well ... expecting some more videos on different basic concepts of java ... great work keep it up ...

You're awesomely good at this. Thank you!

You got a very good teaching and presentation skills. Thumbs up to the awesome video !

Thanks for the tutorial. You explained very well

Very informative , was looking for something like this since long. Thanks a lot :)

your channel helped me understood some important concepts of java, Thanks for your support and keep educating people around.

Very useful ... watched multiple times to explain like you .. inspired me..

Thanks for the great explanation man..!! Great job..

Cool presentation very well explained!!! Thanks :)

Fabulous Explanation!

thank you so much for the wonderful explanation .. I know how much hard work goes into preparing suchtutorials . thank you. once again

Brilliant. Thanks for the explanation :)

Best JVM Video so far !! Thank you, Boss !!

Awesome Video, thanks for sharing it.

very well explained and easy to follow your teaching. Keep posting other topics and it will be great use