Uses of Class
org.bukkit.event.HandlerList

Packages that use HandlerList 
Package Description
org.bukkit.event
Classes dedicated to handling triggered code executions.
org.bukkit.event.block
Events relating to when a block is changed or interacts with the world.
org.bukkit.event.enchantment
Events triggered from an enchantment table.
org.bukkit.event.entity
Events relating to entities, excluding some directly referencing some more specific entity types.
org.bukkit.event.hanging
org.bukkit.event.inventory
Events relating to inventory manipulation.
org.bukkit.event.player
Events relating to players.
org.bukkit.event.raid
Events related to raids.
org.bukkit.event.server
Events relating to programmatic state changes on the server.
org.bukkit.event.vehicle
org.bukkit.event.weather
Events relating to weather.
org.bukkit.event.world
Events triggered by various world states or changes.
org.spigotmc.event.entity
Spigot-specific entity events.
org.spigotmc.event.player
Spigot-specific player events.