spigot clear player inventory code example

Example 1: spigot remove every entity

//Get all entities
Bukkit.getWorld("world").getEntities().forEach(entity -> {

            //Check if entity isnt a player
            if(!(entity instanceof Player))
                entity.remove();

});

Example 2: spigot disable health regeneration

@EventHandler
    public void onPlayerRegainHealth(EntityRegainHealthEvent event) {
        if(event.getRegainReason() == RegainReason.SATIATED || event.getRegainReason() == RegainReason.REGEN)
            event.setCancelled(true);
    }