Best data structure ?

Question

I have a big arena about 1M×1M
And there is units like(soldier,tank,..) on it and they move to kill the Base
(a game like clash of clans)
What is the best data structure i can use to store this arena
For sure it's not a two dimensional array because it's too big

Answer 1

1M seems unreasonably oversized but anyway it's probably better for a lot of other reasons as well to store the position of each unit and other assets as x,y coordinates

Answer 2

Benjamin Jürgens how can i do that ?

Answer 3

Michel Ghaith i think you should try using a game engine. I don't know any for java unfortunately. Maybe unity is an option for you. It uses C# for scripting, which should be an easy transition from java