I am not sure I understand. It seems very easy. You cannot directly remove an element from an array, you could create a new array that excludes that element. Arrays have a fixed size once declared, and I cannot imagine anyone who has written some code not knowing. :/
I "have written some code" but it's been decades since I've done anything significant in Java in particular, and every language handles arrays (and/or data structures that get called "arrays") differently.
