Link to mcrightclickitemevent
The rightClickItem event is fired whenever the player right clicks with an item in their hand. It does not offer any special getters, but you can still access all members from MCPlayerInteractEvent
The event is cancelable.
If the event is canceled, Item#onItemRightClick will not be called
The event does not have a result.
Importing the class
Link to importing-the-class
It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.
Link to extending-mcplayerinteractevent