Where does the data members of a class are stored?

Munish Kumar

I am bit confused about it that where does the data members of a class are stored, in stack or heap.

If i have below code:

class Test
{
int A = 0;
}

then, where does "A" stores?

I know value types stores in stack and reference types stores in heap, so class "Test" would store in Heap, but confused about "A".

Could anyone help me to understand this.

5 Replies

Know the answer? Post it — somebody with the same question will find it here.

Sreekanth Reddy7y ago
Hi munish,

" I have googled it and found most links suggests that the Value type which is an instance field of a class wil be stored on heap."

I feel it is wrong...
In general we knew that "value type" stores in "stack".
Ofcourse I read your total point like "Value type which is an instance field of a class" but, I dont think so, that the field "A" is not the instance field. Because its private & you cant access even you create an object.
Then how come it stores in "Heap" ?
That's the reason I stated as "It stores in stack".

Hope you understood.
Thank you.
Mark as answer, If it helps.
Munish Kumar7y ago
Thank you all for your replies. I have googled it and found most links suggests that the Value type which is an instance field of a class wil be stored on heap.

Find below links:
Puneet suggested this:
https://hackthejava.wordpress.com/2015/01/05/memory-architecture-of-jvmheap-stack-memory/

Bryian suggested this:
http://jonskeet.uk/csharp/memory.html

I have found this:
https://www.c-sharpcorner.com/article/C-Sharp-heaping-vs-stacking-in-net-part-i/

Please correct me if i misunderstood the concept mentioned in above links.
Sreekanth Reddy7y ago
Hi Munish,

As "A" is the private member(field) of the class.
Whenever the object has been created we cant access it(so it wont store in heap).
It will be storing in stack.
Another case for storing in heap is as follows :
If it is present inside the method of the class then it becomes as local member and going to be stored in stack & after its usage of the concern method the memory is going to gets deallocated.
Hope you understood. If not please come up with your query.
Thank you.
Puneet Kankar7y ago
Please check given below links.

https://stackoverflow.com/questions/13624462/where-does-class-object-reference-variable-get-stored-in-java-in-heap-or-stac

https://hackthejava.wordpress.com/2015/01/05/memory-architecture-of-jvmheap-stack-memory/

https://www.daniweb.com/programming/software-development/threads/450593/class-members-on-stack-or-heap
Bryian Tan7y ago
Stack. The following might help

https://www.c-sharpcorner.com/article/stack-heap-value-type-and-reference-type-in-c-sharp/
http://jonskeet.uk/csharp/memory.html