java - In Java can you create an unordered collection of objects that have multiple links?

Question

I'm trying to make a game similar to Risk where each territory on the map is an object of a class I made, Territory. In order to create the game map I would like each Territory object to be linked to the other territories that would be adjacent on the game board. Is there a way in Java to create some kind of data structure that can store all the objects and with links to their "neighbors"? Or is there a way to have objects store references to other objects like you could with pointers in C?

Answer 1

您可以将每个 Territory 实例的邻居存储在实例中，如下所示：

public class Territory{
     private ArrayList<Territory> neighbours;
}

或将所有领土映射到他们的邻居，如下所示：

HashMap<Territory , List<Territory>> neighbours;