Question

In my code, I have an array that has about 1000 elements :

Object[] arr = new Object[1000];

After my array is populated (the whole array or just partially), I need to reinitialize it. From what I know, I have two choices : to initialize it by new keyword, or to iterate over it and set each element to null. I think first approach is best than second, but also I’m waiting for your thoughts.

Any links or articles on this topic are welcome.

Thanks in advance

Answer 1

Agree with your first choice use arr = new Object[1000] and don’t loop it.

Also the use of new Object[1000] doesn’t create 1000 objects it only makes a “placeholder” for 1000 objects so it’s a very cheap operation.

And if you know you will populate all 1000 objects you can just use the array as is without reinitializing it.