USER MODE j

Usage: This mode is automatically set on a user if they have the priviliges configured in their operator configuration.
j - Java client
See CMODE +j for one way to treat java users specially in a channel.

USER MODE J

Usage: UMODE +|-J
Usage: MODE <nick> +|-J
J - Java user exception for +m
This mode is only effective if you have UMODE +m set, it allows all java users to bypass the message block.
Privilege: user
Examples:
/mode jimmers +J
/umode +J