# PlayerLookupHelper > Utility class for resolving player UUIDs, names, and listing online players. `gg.lode.bookshelfapi.api.util.PlayerLookupHelper` --- ## Signature ```java public class PlayerLookupHelper ``` --- ## Static Methods | Method | Return Type | Description | |--------|-------------|-------------| | `resolvePlayerUUID(String name)` | `UUID` | Resolves a player's UUID from their username. | | `resolvePlayerName(UUID uuid)` | `String` | Resolves a player's username from their UUID. | | `getOnlinePlayerNames()` | `List<String>` | Returns a list of all currently online player names. | ### Parameters | Parameter | Type | Description | |-----------|------|-------------| | `name` | `String` | The player's username. | | `uuid` | `UUID` | The player's UUID. | --- ## Usage ```java UUID uuid = PlayerLookupHelper.resolvePlayerUUID("Notch"); String name = PlayerLookupHelper.resolvePlayerName(uuid); List<String> online = PlayerLookupHelper.getOnlinePlayerNames(); ``` --- ## Related Pages - [[MojangProfile]] - [[Observer/API/Managers/IPlayerManager]]