Clarify Java whitelist commands and verify group additions

docs/games/minecraft/create-whitelist.md

@@ -13,13 +13,34 @@ You can use whitelist function of your Minecraft server to allow only whiteliste
 
 ![Whitelist](images/whitelist.png)
 
-3. Start the server and run the following command in-game as operator or in the console:
-```
-/whitelist add yourUsername
+3. Start the server. In the panel console, add a player with this command, replacing `yourUsername` with their Java username:
+
+```text
+whitelist add yourUsername
 ```
-To remove person from the whitelist, you can use this command:
+
+To run the same command in-game, use `/whitelist add yourUsername` as an operator. Console examples below omit the leading `/`; add it when running them in-game.
+
+To remove a player:
+
+```text
+whitelist remove yourUsername
 ```
-/whitelist remove yourUsername
+
+![Whitelist add](images/whitelist-add.png)
+
+## Adding a group of Java players
+
+Run one add command per player, checking the server's reply after each command. Then check the current list:
+
+```text
+whitelist add PlayerOne
+whitelist add PlayerTwo
+whitelist list
 ```
 
-![Whitelist add](images/whitelist-add.png)
+Replace the example names with the players' Java usernames. This keeps existing whitelist entries and avoids editing UUIDs or JSON by hand.
+
+For a longer roster, you can use the optional [ServerBuddy whitelist command generator](https://serverbuddy.net/tools/minecraft-whitelist-command-generator) to remove duplicates and flag invalid name syntax. Review the names, copy only the `whitelist add` lines, and remove their leading `/` for the console. Syntax validation does not verify that an account exists; check the server's replies and the final list.
+
+These examples are for Java Edition. Bedrock uses a separate `allowlist` command.