> 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/sounds.md).

# Sounds, Randomness and Placeholders

Three small packages gathered onto one page: SoundUtils, RandomUtils and PAPIUtils.

Three unrelated one- or two-method packages, merged onto a single page rather than left as stubs: `sound/` (`SoundUtils`), `random/` (`RandomUtils`), and `placeholder/` (`PAPIUtils`).

## SoundUtils

`SoundUtils` (`common/src/main/java/me/wyne/wutils/common/sound/SoundUtils.java`) converts a legacy `org.bukkit.Sound` enum constant into an Adventure `net.kyori.adventure.sound.Sound`, for APIs (like Adventure's `Audience.playSound`) that expect the latter. Five overloads, all delegating to the five-argument form (`common/src/main/java/me/wyne/wutils/common/sound/SoundUtils.java:11-33`):

* `getSound(Sound)` — `Sound.Source.MASTER`, volume `1f`, pitch `1f`.
* `getSound(Sound, Sound.Source)` — volume `1f`, pitch `1f`.
* `getSound(Sound, float volume)` — `Sound.Source.MASTER`, pitch `1f`.
* `getSound(Sound, float volume, float pitch)` — `Sound.Source.MASTER`.
* `getSound(Sound, Sound.Source, float volume, float pitch)` — the full form; builds the Adventure `Sound` from the legacy sound's key string.

## RandomUtils.weightedRandom

`weightedRandom(Map<K, V extends Number> map)` (`common/src/main/java/me/wyne/wutils/common/random/RandomUtils.java:17-37`) picks a random entry from `map`, where each value is that entry's selection weight. Entries with a non-positive weight are excluded from selection (their weight does not count toward the total, and they cannot be picked) but are not removed from consideration otherwise.

**Returns `null`** if `map` is empty, or if every weight in it is zero or negative (total weight `<= 0`) — callers must check for `null` rather than assuming an entry is always returned. Otherwise it draws uniformly from `[0, totalWeight)` via `ThreadLocalRandom` and walks the map's entries to find the one the draw landed in.

## PAPIUtils

`PAPIUtils` (`common/src/main/java/me/wyne/wutils/common/placeholder/PAPIUtils.java`) has one method: `getPlaceholder(String identifier, String params)` (`common/src/main/java/me/wyne/wutils/common/placeholder/PAPIUtils.java:13-15`), which joins its two arguments as `identifier + "_" + params` — the body of a PlaceholderAPI placeholder, without the surrounding `%...%` delimiters.

**Only meaningful with PlaceholderAPI.** This method itself has no PlaceholderAPI dependency (it's plain string concatenation), but its purpose only makes sense in the context of registering a PlaceholderAPI expansion, which requires PlaceholderAPI as a `compileOnly` dependency the consumer must supply. See the [module overview](/wyne-docs/contributing/common/common.md) for the full list of optional integrations.


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