execute java

The execute java: section is compiled once at script parse time and cached by the hash of its source (SHA-256) — identical blocks aren’t recompiled.

Context inside a block

Name	Type	Notes
event	Event	The triggering Bukkit event (may be null)
sender	CommandSender	Player/console for player events, ServerCommandEvent, and Skript command triggers; console otherwise
getVar(String)	Object	Reads a Skript variable, local scope first
setVar(String, Object)	void	Writes a Skript variable, converting the value
context	SkBeeJavaContext	Full context, including context.get("attacker")

Example

on damage:
    execute java:
        if (victim() instanceof Player) {
            setVar("last_damage", event.getDamage());
        }

Variable names in getVar/setVar accept name, {name}, and %name% interchangeably.