JVM ( java virtual machine) architecture - tutorial
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- Опубликовано: 28 июл 2024
- In this video I tried to explore one of the popular core Java interview topics - Java virtual machine architecture - this provides you a fairly detailed walk through, also touches up on topics such as permgen and metaspace( jdk8) - I am going to post more topics like these, hit subscribe if you like what you see.
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Man, I have already watched this video like 5 times and I keep coming back to refresh. Kudos
Same here👍
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!!!
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.
Excellent presention Mr. Ramachandran.. Exactly what i was looking for.
Thanks again n again.!
An excellent, detailed, on-point overview of the JVM. Great work!
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..
despite slightly outdated it's one of the best videos I've went through, perfect to start with
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!
One amazing tutorial and very well explained. Thank You!
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 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...
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!
I'm so impressed. An in-depth and crisp architectural overview. Keep doin' the great work!
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!!!
Awesome presentation with all the images. Thanks and awaiting more of your videos.
Excellent video... never seen a better one on JVM. Thanks a lot!
Fully agree!
ruclips.net/video/TEZipJGXggA/видео.html
You can also watch this
thank you very much for your great explanation it has been very useful to understand how JVM works. congratulations for your video.
I happened to find this by chance. Awesome work, Ranjith!
Excellent way to simplify such a vast topic. Very good explanation, to be understood by even a Lehman. Great Job! Thanks much!
Clear explanation of each step with enough time spent through every important point!
Very helpful , Thank you, Hope to see more videos coming through.
Very well explained. Thanks for creating and sharing the Video.
This is the best explanation I've seen on this topic so far! Huge thanks to you!
Great video ,now its much easier to learn more about JVM .
Very simple, nice and easily understandable... thanks for sharing.
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!
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.
It's really cool... Thanks a lot for your effort! Your approach is also great.
Awesome, beautifully and crisply explained. Thanks so much.
Thanks a lot, it helped understanding the JVM
Very good explanation! I liked all of the simple visuals. Thank you.
Simple words explained very complicated architecture.
Thanks for your good effort. Keep going. We are now big fan of your videos.
That was good presentation. Appreciate you taking the effort to share it with us. Thanks
Asweome learning videos Bro! Keep rocking!
Great work! Thanks for doing this.
I enjoy your tutorials because you always go into depth and everything you say makes sense. Hence why i have subscribed.
Amazingly informative.....Great Explanation...Thank You.
Excellent!!!! thanks much for such a careful and detailed session.
couldn't ask for ymore simpler way.. you are a life savor.. thanks man!!
Thanks so much for this video. It is a great overview of the JVM. It really helped clear up some of my basic questions.
Brilliant. Thanks for the explanation :)
Great video, great lesson! Thank you.
Excellent and very helpful to explore lot about JVM. Thanks.
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.
Thats a beautiful one. Thanks a lot for your time and effort!
I liked the presentation.
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 ...
Best explanation of JVM I got till now. Awesome work. :)
Thanks a lot for such a crystal clear explanation of JVM and it's execution
Excellent tutorial to understand JVM arch. Thanks!
Cool presentation very well explained!!! Thanks :)
Thanks Ranjith, for taking the time to explain an overview of JVM. Made a lot of concepts clear. Please keep posting such videos :)
excellent presentation and explanation. thank you very much for the lesson.
Well Explained in a simple way, I have understood now how JVM is working.
Thanks a lot.
Abdelmuniem Abdallah - Thanks, feel free to ping me if you have any questions.
Very Nice video! Explained everything, what I was looking for. Great!
Amazing tutorial , sir . Thanks for sharing your knowledge.
I like the way u teach. Clean and Simple.
Best way to learn
Thank you
Perfect. Excellent.One of my very successful searches till date. Thank you very much.
Great presentation! Nicely done!
great tutorial.. explained every detail.
Awesome my dear friend. Explained with proper diagrams in a very easy way. God Bless You!
Thanks for the great explanation man..!! Great job..
Simple and clean, thanks for creating this video :)
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.
for which company
How many years of Experience do you have
Awesome Video, thanks for sharing it.
Thanks A lot Ranjith for Simple and Clear explanation! Keep up your good work.
very well explained and easy to follow your teaching. Keep posting other topics and it will be great use
Excellent video ranjith!! Very crisp and clear presentation
It helped me to understand a pretty well about the JVM Architecture .its simple,clean and crispy explanation . Thanks you.
Brilliant... 1st place where I found the understanding of JVM !! Very good Bro.
Lovely Presentation with key points of the JVM architecture.
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.
the best video and best explanation on JVM i've watched so far... you are a great teacher dude... thanks
superb. cleared a lot many concepts
Excellent tutorial .... haven't come across something so comprehensive on JVM so far
Pretty nice explanation ... Thanks for sharing your hardwork
Thanks for the tutorial. You explained very well
The detail in explanation was no-less than perfect ... Reference invoking with class and study materials -Thanks
Excellent video, Thanks!
Awesome video Ranjit. Increased my clarity on JVM architecture . Many thanks! ☺️ 👍💐
Thank you for uploading videos. very well explained.
Great presentation and content. Thanks!
Very nice, thank you
Nice Explanation. Many Thanks for your effort
High Quality, well done
Phenomenal explanation !! Investing 30 min in this video, will keep this knowledge for ages in my head. Thank you.
Excellent tutorial. Subscribed.
thank you so much for the wonderful explanation .. I know how much hard work goes into preparing suchtutorials . thank you. once again
You got a very good teaching and presentation skills. Thumbs up to the awesome video !
Just what i was looking for to prepare for my interview!
excellent explanation in superb descriptive way (y)
Very informative , was looking for something like this since long. Thanks a lot :)
Thanks a lot. Very informative. One of the best videos on JVM.
This is really a nice video with contents explained very clearly. Good work and keep it up !!
Excellent video on the internal structure and workings of jvm.
Thanks a lot
Fabulous explanation sir it's very helpful too Thank you for making this excellent video
Well Explained in simple way :-)
Awesome video... felt so good after watching.. great stuff put together.. please come up with more such videos... on various Java topics.. subscribed to your channel
You're awesomely good at this. Thank you!
awesome RANJITH.. Keep posting videos... very useful..appreciate your efforts..