> For the complete documentation index, see [llms.txt](https://wyne.gitbook.io/wyne-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wyne.gitbook.io/wyne-docs/contributing/common/players.md).

# Players

PlayerUtils: vanilla experience level and point conversions, and offline-player handling.

`PlayerUtils` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java`) is the entire `player/` package: vanilla experience-level/point conversions, and an offline-player existence check.

## Experience conversions

Vanilla Minecraft's level/experience-point relationship is piecewise, split at levels 16/17 and 30/31/32. `PlayerUtils` implements both directions plus the derived helpers `common/`-wide code relies on:

* `levelToExp(int level)` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java:22-29`) — total accumulated experience points needed to reach `level` from zero.
* `expToLevel(int exp)` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java:31-57`) — inverse of the above: the level reached by `exp` total points. Returns `0` for `exp <= 0`.
* `expToLevelUp(int currentLevel)` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java:71-78`) — how many experience points are needed to go from `currentLevel` to `currentLevel + 1`.
* `currentExp(Player player)` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java:81-86`) — converts `player`'s current level plus fractional progress (`player.getExp()`) into a total point count, via `levelToExp(level) + round(expToLevelUp(level) * exp)`.
* `setExp(Player player, int exp)` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java:89-93`) — resets the player to level 0 and grants `exp` total points via `Player.giveExp`.
* `addExp(Player player, int exp)` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java:96-98`) — adds `exp` on top of the player's current total, via `setExp(player, currentExp(player) + exp)`. Note this round-trips through `setExp`, so it briefly resets the player to level 0 before regranting the combined total.

All four formula methods are pure integer/float math with no Bukkit calls — the piecewise boundaries and coefficients match vanilla's published level curve.

## exists

`exists(OfflinePlayer player)` (`common/src/main/java/me/wyne/wutils/common/player/PlayerUtils.java:101-103`) returns `true` if `player` is currently online, or has played on the server before (`hasPlayedBefore()`). This is the same "is this a real player" check `CommandUtils.getOfflinePlayer` applies inline — see [Commands](/wyne-docs/contributing/common/commands.md).


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