Game.java

public class Game {
    public static void main(String[] args) {
        Graph<Zone> gameMap = new Graph<>();

        Zone zone1 = new Zone("Zone1");
        Zone zone2 = new Zone("Zone2");
        Zone zone3 = new Zone("Zone3");
        Zone zone4 = new Zone("Zone4");
        Zone zone5 = new Zone("Zone5");
        Zone zone6 = new Zone("Zone6");
        Zone zone7 = new Zone("Zone7");
        Zone zone8 = new Zone("Zone8");
        Zone zone9 = new Zone("Zone9");
        Zone zone10 = new Zone("Zone10");

        gameMap.addEdge(zone1, zone2);
        gameMap.addEdge(zone2, zone3);
        gameMap.addEdge(zone2, zone4);


        // can attack
        System.out.println(gameMap.hasEdge(zone1, zone2));
    }
}