Depends on the langugae you're training on

I guess because it's more comprehensive and declarative.

Did you post your comment on the wrong solution by accident? This solution is fine, one of the others has the problem you described.

Thank you for your comment. I think you're right, so i refactored my solution.

One must be carefull with this method, because when you pass "int[] array", you pass a reference to the array. So, after the completion of the method the source array is also inverted.

else is not necessary here, i++ is enough)

And what about ArrayIndexOutOfBoundsException?)

But you don't provide a check for not valid input in this code, so that's really not good practice)