Memory Fundamentals - part 1 of Java Memory Management

How java manages memory, explaining the stack and the heap.

[@alecmontgomery2099]

The speaker gave this presentation in a poetic fashion. The alterations in vocal speed, pitch, and use of pause were excellent--they made the presentation more enjoyable to listen to, and easier to understand. Also aiding my understanding, was the graphics and fairly simple examples. THANK YOU!

[@ruixue6955]

2:20 Java Memory 2:25 stack and heap 2:40 stack 2:52 every thread has its own stack 3:19 visualization of stack 3:59 example of how stack works 5:05 scope 6:36 all local variables are created on the stack 7:30 heap 10:44 visualization

[@theviralstory3356]

Just brilliant, give my thanks to Matt ;) cheers !!

[@onesline7685]

Best, best, best video on JVM's memory allocation!!

[@florinmarcus]

Amazing presentation skills, congratulations!

[@anilkommalapati6248]

one of the best java tutorial. awesome.

[@himanshisingh7589]

Very nice video and it clearly explained the basics for java memory management.

[@mintymintfresh]

Awesome way of explaining ....loved it

[@LalGebi]

Awesome... very interesting and great way of explaining.. pl. create such type of more videos..

[@stefansalapura6659]

Bravo. So easy and clean.

[@achillesheel7314]

Wonderful clear explanation. Thnak you so much!

[@ananthasubramanian7355]

Wow...!! Very good explanation via graphics..!! Topics are easy to grasp this way..!! Thanks a lot for this...!!

[@sanjeebguru]

Nice explanation. Thanks for the video

[@supunkavinda8660]

wow, Great Explanation!

[@mohammedviso2269]

Great tutorial .......Thanks a lot

[@rishat2125]

Yes! now I understand. This is such an awesome tutorial. Lets follow the series n see what more I can learn. Thanks so much :)

[@boopathirajagopalan3047]

Easy to understand. Awesome

[@sameerpatere2983]

Nice explanation sir... Thanks for effort

[@arupnaskar3818]

really its a good one to make understand and well as to like it..

[@Code-09]

best explaination....Thank you.

[@vrundaempey5623]

Great Explanation!

[@shamimchaklader157]

Just awesome explanation !!!!!!!!!!!!!!

[@ameenabdelhai9169]

Best! Thank you,

[@lwach87]

Great tutorial!

[@alwysrite]

excellent material

[@jhguygih]

I love this computer / advanced robot / perfect voice. I could speed up to 1.5 and easily understand. Thanks

[@VPPChesterwood]

This is our wonderful trainer Matt, he's honestly not a robot!

[@hashikdonthineni2863]

That is not a computer for sure...

[@user-mn3iq2cs9n]

The person who built that robot had a Winchester 'r':) Great video. Very helpful. Well done mates, thank you.

[@deontayjefferson6639]

Man you are a genius. I never thought of speeding up the videos but I tried it and you are right now I can listen to videos in a shorter amount a time. Thanks

[@premabhisek]

1.25x speed was comfortable in the latter half of the video:)

[@amey630]

Good explanation.

[@kamoevic]

Great video!!!

[@rosasmellshaha]

I never leave comments. But this was SO good, THANK YOU!!!

[@VPPChesterwood]

That makes us very happy - thank you :-)

[@shantanusood1989]

Excellent thanks

[@RajeshKumarKondapalli]

Nicely explained

[@arunbm123]

nice explanation

[@maheralzubi3011]

great greaaat thanx

[@liubovk2]

The first example with stack shows String[] args being in stack, however, it is an object and is stored in heap

[@VPPChesterwood]

You're quite right, the picture is misleading. args is a variable on the stack of main (which is why we've put it on the picture), but it is referencing the array, which as with all java objects, is stored on the heap. We should have drawn the object separately on the heap but I guess we thought that would overcomplicate matters.

[@musa7801]

Nice

[@erlanggadewasakti]

thanks sir

[@leegodfrey6806]

In the case of main(String[] args) called with an argument "hello", is the memory scheme stack:args -> heap:Array[0] -> heap:String("hello")? Is the instance of args on the stack a reference type? It refers to an array of Strings on the heap, but does args on the stack have a "type"?

[@eahmedshendy]

👍

[@santoshkumarappala6681]

Why String[] args stored in stack. Since array is a reference type, it's values are supposed to be stored in heap and only the reference pointer should be available in stack. Could you answer please?

[@VPPChesterwood]

Yes in this case the "abc" is interned as it is a constant string, which has obscured our explaination somewhat. The String pool is itself stored on the heap (it used to be in permgen) so you can still say that all objects are stored on the heap.It's all very confusing because of these "clever" tricks that java is performing. It's probably safest to digest the JLS here (especially 3.10.5-1):docs.oracle.com/javase/specs/jls/se7/html/jls-3.html#jls-3.10.5

[@ibrahimshaikh3642]

Explain nicely

[@echo7984]

I love this video, but i am confused now. for example, String s = "abc"; Should the object "abc" are stored in the constant pool (method area) instead of heap ? I thought only the objects created by "new" are stored on the heap.

[@VPPChesterwood]

Yes in this case the "abc" is interned as it is a constant string, which has obscured our explaination somewhat. Sorry. The String pool is itself stored on the heap (it used to be in permgen) so you can still say that all objects are stored on the heap.It's all very confusing because of these "clever" tricks that java is performing. It's probably safest to digest the JLS here (especially 3.10.5-1):docs.oracle.com/javase/specs/jls/se7/html/jls-3.html#jls-3.10.5

[@tradingsimplified2909]

Best, best, best video on JVM's memory allocation!!