Removing array from memory in Java

Asked Mar 15 '20 at 16:40

Active Mar 15 '20 at 16:40

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I am trying to make a 2d array consume 0 memory after I am done using it. I want to implement something likes this:-

int a[][] = new int[10][10] // alloting new memory say 400Mb

// do something

// Now I want to make it null

a => null // clearing the 400 Mb it took before

// do something

asked Mar 15 '20 at 16:40

Yash Tibrewal

This is what garbage collection is for. – Hovercraft Full Of Eels Mar 15 '20 at 16:42
I search about garbage collecter as well, but as far as I understand, it clears variables pointing to null. so how do I point the 2d array to null ? – Yash Tibrewal Mar 15 '20 at 16:45
You're confusing variables and objects. Read the duplicate question and the detailed answers – Hovercraft Full Of Eels Mar 15 '20 at 16:47
Usually, the best thing to do is to use variables on local scope, not a class scope – Hovercraft Full Of Eels Mar 15 '20 at 16:48
When your variable loses it's reference, the garbage collector will reclaim it and free it from memory automatically, setting it to null might help that, but when it'll be reclaimed is will depende on the JVM, usually you don't have to worry about that. – soz Mar 15 '20 at 19:45

Removing array from memory in Java

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