How to return a list of players from a hashMap?

Question

Java

Hello everyone,
Yes, so I have a LeagueManager class. It has a "map" of players HashMap. The key is the player's nickname (String), the value is the player himself (Player).
The question is written in the topic, but I will duplicate it: How to return a list of players from a hashMap? (the problem is in the getAllPlayers() method)

import java.util.HashMap;
import java.util.Map;
public class LeagueManager implements Manager{
Map players = new HashMap();
public void addPlayer(Player player) {
players.put(player.getNick(), player);
}
public void removePlayer(Player player) {
if (!players.isEmpty()) {
players.remove(player.getNick());
}
}
public Player getPlayer(String name) {
if (!players.isEmpty() && players.containsKey(name)) {
return (Player) players.get(name);
} else {
System.out.println("Error: there is no player with nick " + name);
return null;
}
}
public Player[] getAllPlayers() {
if (!players.isEmpty()) {
return null;
} else {
return null;
}
}

Answer 1

Heroes were also found on the foreign resource and offered this option:

public Player[] getAllPlayers() {
Player[] result = new Player[players.size()];
return players.values().toArray(result);
}

Here is my worker. But thank you all for stopping by!
Z.Y. As I understand it, type change is avoided here, thereby cutting off the error that fell out to me when using the solution from EugeneP2

Answer 2

public Player[] getAllPlayers() {
      return  (Player[])players.values().toArray();
}

Interface Map
And don't forget about generics

Answer 3

Who are generics for?

Map<String, Player> players = new HashMap<>();
...
public List<Player> getAllPlayers() {
return players.values();
}

Write normal code. Learn collections and generics in Java, this is the basis.