MultiUserChat (smack 4.0.2 API)

java.lang.Object
- org.jivesoftware.smackx.muc.MultiUserChat

```
public class MultiUserChat
extends Object
```
A MultiUserChat is a conversation that takes place among many users in a virtual room. A room could have many occupants with different affiliation and roles. Possible affiliatons are "owner", "admin", "member", and "outcast". Possible roles are "moderator", "participant", and "visitor". Each role and affiliation guarantees different privileges (e.g. Send messages to all occupants, Kick participants and visitors, Grant voice, Edit member list, etc.).

Constructor Summary

Constructors
Constructor and Description
`MultiUserChat(XMPPConnection connection, String room)` Creates a new multi user chat with the specified connection and room name.

Method Summary

Methods
Modifier and Type	Method and Description
`static void`	`addInvitationListener(XMPPConnection conn, InvitationListener listener)` Adds a listener to invitation notifications.
`void`	`addInvitationRejectionListener(InvitationRejectionListener listener)` Adds a listener to invitation rejections notifications.
`void`	`addMessageListener(PacketListener listener)` Adds a packet listener that will be notified of any new messages in the group chat.
`void`	`addParticipantListener(PacketListener listener)` Adds a packet listener that will be notified of any new Presence packets sent to the group chat.
`void`	`addParticipantStatusListener(ParticipantStatusListener listener)` Adds a listener that will be notified of changes in occupants status in the room such as the user being kicked, banned, or granted admin permissions.
`void`	`addPresenceInterceptor(PacketInterceptor presenceInterceptor)` Adds a new `PacketInterceptor` that will be invoked every time a new presence is going to be sent by this MultiUserChat to the server.
`void`	`addSubjectUpdatedListener(SubjectUpdatedListener listener)` Adds a listener to subject change notifications.
`void`	`addUserStatusListener(UserStatusListener listener)` Adds a listener that will be notified of changes in your status in the room such as the user being kicked, banned, or granted admin permissions.
`void`	`banUser(String jid, String reason)` Bans a user from the room.
`void`	`banUsers(Collection<String> jids)` Bans users from the room.
`void`	`changeAvailabilityStatus(String status, Presence.Mode mode)` Changes the occupant's availability status within the room.
`void`	`changeNickname(String nickname)` Changes the occupant's nickname to a new nickname within the room.
`void`	`changeSubject(String subject)` Changes the subject within the room.
`void`	`create(String nickname)` Creates the room according to some default configuration, assign the requesting user as the room owner, and add the owner to the room but not allow anyone else to enter the room (effectively "locking" the room).
`Message`	`createMessage()` Creates a new Message to send to the chat room.
`boolean`	`createOrJoin(String nickname)` Like `create(String)`, but will return true if the room creation was acknowledged by the service (with an 201 status code).
`Chat`	`createPrivateChat(String occupant, MessageListener listener)` Returns a new Chat for sending private messages to a given room occupant.
`static void`	`decline(XMPPConnection conn, String room, String inviter, String reason)` Informs the sender of an invitation that the invitee declines the invitation.
`void`	`destroy(String reason, String alternateJID)` Sends a request to the server to destroy the room.
`protected void`	`finalize()`
`Collection<Affiliate>`	`getAdmins()` Returns a collection of `Affiliate` with the room administrators.
`Form`	`getConfigurationForm()` Returns the room's configuration form that the room's owner can use or `null` if no configuration is possible.
`static Collection<HostedRoom>`	`getHostedRooms(XMPPConnection connection, String serviceName)` Returns a collection of HostedRooms where each HostedRoom has the XMPP address of the room and the room's name.
`static List<String>`	`getJoinedRooms(XMPPConnection connection, String user)` Returns a List of the rooms where the requested user has joined.
`Collection<Affiliate>`	`getMembers()` Returns a collection of `Affiliate` with the room members.
`Collection<Occupant>`	`getModerators()` Returns a collection of `Occupant` with the room moderators.
`String`	`getNickname()` Returns the nickname that was used to join the room, or `null` if not currently joined.
`Occupant`	`getOccupant(String user)` Returns the Occupant information for a particular occupant, or `null` if the user is not in the room.
`Presence`	`getOccupantPresence(String user)` Returns the presence info for a particular user, or `null` if the user is not in the room.
`List<String>`	`getOccupants()` Returns an Iterator (of Strings) for the list of fully qualified occupants in the group chat.
`int`	`getOccupantsCount()` Returns the number of occupants in the group chat.
`Collection<Affiliate>`	`getOutcasts()` Returns a collection of `Affiliate` with the room outcasts.
`Collection<Affiliate>`	`getOwners()` Returns a collection of `Affiliate` with the room owners.
`Collection<Occupant>`	`getParticipants()` Returns a collection of `Occupant` with the room participants.
`Form`	`getRegistrationForm()` Returns the room's registration form that an unaffiliated user, can use to become a member of the room or `null` if no registration is possible.
`String`	`getReservedNickname()` Returns the reserved room nickname for the user in the room.
`String`	`getRoom()` Returns the name of the room this MultiUserChat object represents.
`static RoomInfo`	`getRoomInfo(XMPPConnection connection, String room)` Returns the discovered information of a given room without actually having to join the room.
`static Collection<String>`	`getServiceNames(XMPPConnection connection)` Returns a collection with the XMPP addresses of the Multi-User Chat services.
`String`	`getSubject()` Returns the last known room's subject or `null` if the user hasn't joined the room or the room does not have a subject yet.
`void`	`grantAdmin(Collection<String> jids)` Grants administrator privileges to other users.
`void`	`grantAdmin(String jid)` Grants administrator privileges to another user.
`void`	`grantMembership(Collection<String> jids)` Grants membership to other users.
`void`	`grantMembership(String jid)` Grants membership to a user.
`void`	`grantModerator(Collection<String> nicknames)` Grants moderator privileges to participants or visitors.
`void`	`grantModerator(String nickname)` Grants moderator privileges to a participant or visitor.
`void`	`grantOwnership(Collection<String> jids)` Grants ownership privileges to other users.
`void`	`grantOwnership(String jid)` Grants ownership privileges to another user.
`void`	`grantVoice(Collection<String> nicknames)` Grants voice to visitors in the room.
`void`	`grantVoice(String nickname)` Grants voice to a visitor in the room.
`void`	`invite(Message message, String user, String reason)` Invites another user to the room in which one is an occupant using a given Message.
`void`	`invite(String user, String reason)` Invites another user to the room in which one is an occupant.
`boolean`	`isJoined()` Returns true if currently in the multi user chat (after calling the `join(String)` method).
`static boolean`	`isServiceEnabled(XMPPConnection connection, String user)` Returns true if the specified user supports the Multi-User Chat protocol.
`void`	`join(String nickname)` Joins the chat room using the specified nickname.
`void`	`join(String nickname, String password)` Joins the chat room using the specified nickname and password.
`void`	`join(String nickname, String password, DiscussionHistory history, long timeout)` Joins the chat room using the specified nickname and password.
`void`	`kickParticipant(String nickname, String reason)` Kicks a visitor or participant from the room.
`void`	`leave()` Leave the chat room.
`Message`	`nextMessage()` Returns the next available message in the chat.
`Message`	`nextMessage(long timeout)` Returns the next available message in the chat.
`Message`	`pollMessage()` Polls for and returns the next message, or `null` if there isn't a message immediately available.
`static void`	`removeInvitationListener(XMPPConnection conn, InvitationListener listener)` Removes a listener to invitation notifications.
`void`	`removeInvitationRejectionListener(InvitationRejectionListener listener)` Removes a listener from invitation rejections notifications.
`void`	`removeMessageListener(PacketListener listener)` Removes a packet listener that was being notified of any new messages in the multi user chat.
`void`	`removeParticipantListener(PacketListener listener)` Remoces a packet listener that was being notified of any new Presence packets sent to the group chat.
`void`	`removeParticipantStatusListener(ParticipantStatusListener listener)` Removes a listener that was being notified of changes in occupants status in the room such as the user being kicked, banned, or granted admin permissions.
`void`	`removePresenceInterceptor(PacketInterceptor presenceInterceptor)` Removes a `PacketInterceptor` that was being invoked every time a new presence was being sent by this MultiUserChat to the server.
`void`	`removeSubjectUpdatedListener(SubjectUpdatedListener listener)` Removes a listener from subject change notifications.
`void`	`removeUserStatusListener(UserStatusListener listener)` Removes a listener that was being notified of changes in your status in the room such as the user being kicked, banned, or granted admin permissions.
`void`	`revokeAdmin(Collection<String> jids)` Revokes administrator privileges from users.
`void`	`revokeAdmin(String jid)` Revokes administrator privileges from a user.
`void`	`revokeMembership(Collection<String> jids)` Revokes users' membership.
`void`	`revokeMembership(String jid)` Revokes a user's membership.
`void`	`revokeModerator(Collection<String> nicknames)` Revokes moderator privileges from other users.
`void`	`revokeModerator(String nickname)` Revokes moderator privileges from another user.
`void`	`revokeOwnership(Collection<String> jids)` Revokes ownership privileges from other users.
`void`	`revokeOwnership(String jid)` Revokes ownership privileges from another user.
`void`	`revokeVoice(Collection<String> nicknames)` Revokes voice from participants in the room.
`void`	`revokeVoice(String nickname)` Revokes voice from a participant in the room.
`void`	`sendConfigurationForm(Form form)` Sends the completed configuration form to the server.
`void`	`sendMessage(Message message)` Sends a Message to the chat room.
`void`	`sendMessage(String text)` Sends a message to the chat room.
`void`	`sendRegistrationForm(Form form)` Sends the completed registration form to the server.

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - MultiUserChat
```
public MultiUserChat(XMPPConnection connection,
             String room)
```
    Creates a new multi user chat with the specified connection and room name. Note: no information is sent to or received from the server until you attempt to join the chat room. On some server implementations, the room will not be created until the first person joins it.
    Most XMPP servers use a sub-domain for the chat service (eg chat.example.com for the XMPP server example.com). You must ensure that the room address you're trying to connect to includes the proper chat sub-domain.
    
    Parameters:
    connection - the XMPP connection.
    room - the name of the room in the form "roomName@service", where "service" is the hostname at which the multi-user chat service is running. Make sure to provide a valid JID.
- Method Detail
  - isServiceEnabled
```
public static boolean isServiceEnabled(XMPPConnection connection,
                       String user)
                                throws SmackException.NoResponseException,
                                       XMPPException.XMPPErrorException,
                                       SmackException.NotConnectedException
```
    Returns true if the specified user supports the Multi-User Chat protocol.
    
    Parameters:
    connection - the connection to use to perform the service discovery.
    user - the user to check. A fully qualified xmpp ID, e.g. jdoe@example.com.
    
    Returns:
    a boolean indicating whether the specified user supports the MUC protocol.
    
    Throws:
    
    XMPPException.XMPPErrorException
    
    SmackException.NoResponseException
    
    SmackException.NotConnectedException
  - getJoinedRooms
```
public static List<String> getJoinedRooms(XMPPConnection connection,
                          String user)
                                   throws SmackException.NoResponseException,
                                          XMPPException.XMPPErrorException,
                                          SmackException.NotConnectedException
```
    Returns a List of the rooms where the requested user has joined. The Iterator will contain Strings where each String represents a room (e.g. room@muc.jabber.org).
    
    Parameters:
    connection - the connection to use to perform the service discovery.
    user - the user to check. A fully qualified xmpp ID, e.g. jdoe@example.com.
    
    Returns:
    a List of the rooms where the requested user has joined.
    
    Throws:
    
    XMPPException.XMPPErrorException
    
    SmackException.NoResponseException
    
    SmackException.NotConnectedException
  - getRoomInfo
```
public static RoomInfo getRoomInfo(XMPPConnection connection,
                   String room)
                            throws SmackException.NoResponseException,
                                   XMPPException.XMPPErrorException,
                                   SmackException.NotConnectedException
```
    Returns the discovered information of a given room without actually having to join the room. The server will provide information only for rooms that are public.
    
    Parameters:
    connection - the XMPP connection to use for discovering information about the room.
    room - the name of the room in the form "roomName@service" of which we want to discover its information.
    
    Returns:
    the discovered information of a given room without actually having to join the room.
    
    Throws:
    
    XMPPException.XMPPErrorException
    
    SmackException.NoResponseException
    
    SmackException.NotConnectedException
  - getServiceNames
```
public static Collection<String> getServiceNames(XMPPConnection connection)
                                          throws SmackException.NoResponseException,
                                                 XMPPException.XMPPErrorException,
                                                 SmackException.NotConnectedException
```
    Returns a collection with the XMPP addresses of the Multi-User Chat services.
    
    Parameters:
    connection - the XMPP connection to use for discovering Multi-User Chat services.
    
    Returns:
    a collection with the XMPP addresses of the Multi-User Chat services.
    
    Throws:
    
    XMPPException.XMPPErrorException
    
    SmackException.NoResponseException
    
    SmackException.NotConnectedException
  - getHostedRooms
```
public static Collection<HostedRoom> getHostedRooms(XMPPConnection connection,
                                    String serviceName)
                                             throws SmackException.NoResponseException,
                                                    XMPPException.XMPPErrorException,
                                                    SmackException.NotConnectedException
```
    Returns a collection of HostedRooms where each HostedRoom has the XMPP address of the room and the room's name. Once discovered the rooms hosted by a chat service it is possible to discover more detailed room information or join the room.
    
    Parameters:
    connection - the XMPP connection to use for discovering hosted rooms by the MUC service.
    serviceName - the service that is hosting the rooms to discover.
    
    Returns:
    a collection of HostedRooms.
    
    Throws:
    
    XMPPException.XMPPErrorException
    
    SmackException.NoResponseException
    
    SmackException.NotConnectedException
  - getRoom
```
public String getRoom()
```
    Returns the name of the room this MultiUserChat object represents.
    
    Returns:
    the multi user chat room name.
  - create
```
public void create(String nickname)
            throws SmackException.NoResponseException,
                   XMPPException.XMPPErrorException,
                   SmackException
```
    Creates the room according to some default configuration, assign the requesting user as the room owner, and add the owner to the room but not allow anyone else to enter the room (effectively "locking" the room). The requesting user will join the room under the specified nickname as soon as the room has been created.
    To create an "Instant Room", that means a room with some default configuration that is available for immediate access, the room's owner should send an empty form after creating the room. sendConfigurationForm(Form)
    To create a "Reserved Room", that means a room manually configured by the room creator before anyone is allowed to enter, the room's owner should complete and send a form after creating the room. Once the completed configuration form is sent to the server, the server will unlock the room. sendConfigurationForm(Form)
    
    Parameters:
    nickname - the nickname to use.
    
    Throws:
    
    XMPPException.XMPPErrorException - if the room couldn't be created for some reason (e.g. 405 error if the user is not allowed to create the room)
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException - If the creation failed because of a missing acknowledge from the server, e.g. because the room already existed.
  - createOrJoin
```
public boolean createOrJoin(String nickname)
                     throws SmackException.NoResponseException,
                            XMPPException.XMPPErrorException,
                            SmackException
```
    Like create(String), but will return true if the room creation was acknowledged by the service (with an 201 status code). It's up to the caller to decide, based on the return value, if he needs to continue sending the room configuration. If false is returned, the room already existed and the user is able to join right away, without sending a form.
    
    Parameters:
    nickname - the nickname to use.
    
    Returns:
    true if the room creation was acknowledged by the service, false otherwise.
    
    Throws:
    
    XMPPException.XMPPErrorException - if the room couldn't be created for some reason (e.g. 405 error if the user is not allowed to create the room)
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException
  - join
```
public void join(String nickname)
          throws SmackException.NoResponseException,
                 XMPPException.XMPPErrorException,
                 SmackException.NotConnectedException
```
    Joins the chat room using the specified nickname. If already joined using another nickname, this method will first leave the room and then re-join using the new nickname. The default connection timeout for a reply from the group chat server that the join succeeded will be used. After joining the room, the room will decide the amount of history to send.
    
    Parameters:
    nickname - the nickname to use.
    
    Throws:
    
    SmackException.NoResponseException
    
    XMPPException.XMPPErrorException - if an error occurs joining the room. In particular, a 401 error can occur if no password was provided and one is required; or a 403 error can occur if the user is banned; or a 404 error can occur if the room does not exist or is locked; or a 407 error can occur if user is not on the member list; or a 409 error can occur if someone is already in the group chat with the same nickname.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - join
```
public void join(String nickname,
        String password)
          throws XMPPException.XMPPErrorException,
                 SmackException
```
    Joins the chat room using the specified nickname and password. If already joined using another nickname, this method will first leave the room and then re-join using the new nickname. The default connection timeout for a reply from the group chat server that the join succeeded will be used. After joining the room, the room will decide the amount of history to send.
    A password is required when joining password protected rooms. If the room does not require a password there is no need to provide one.
    
    Parameters:
    nickname - the nickname to use.
    password - the password to use.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs joining the room. In particular, a 401 error can occur if no password was provided and one is required; or a 403 error can occur if the user is banned; or a 404 error can occur if the room does not exist or is locked; or a 407 error can occur if user is not on the member list; or a 409 error can occur if someone is already in the group chat with the same nickname.
    
    SmackException - if there was no response from the server.
  - join
```
public void join(String nickname,
        String password,
        DiscussionHistory history,
        long timeout)
          throws XMPPException.XMPPErrorException,
                 SmackException.NoResponseException,
                 SmackException.NotConnectedException
```
    Joins the chat room using the specified nickname and password. If already joined using another nickname, this method will first leave the room and then re-join using the new nickname.
    To control the amount of history to receive while joining a room you will need to provide a configured DiscussionHistory object.
    A password is required when joining password protected rooms. If the room does not require a password there is no need to provide one.
    If the room does not already exist when the user seeks to enter it, the server will decide to create a new room or not.
    
    Parameters:
    nickname - the nickname to use.
    password - the password to use.
    history - the amount of discussion history to receive while joining a room.
    timeout - the amount of time to wait for a reply from the MUC service(in milleseconds).
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs joining the room. In particular, a 401 error can occur if no password was provided and one is required; or a 403 error can occur if the user is banned; or a 404 error can occur if the room does not exist or is locked; or a 407 error can occur if user is not on the member list; or a 409 error can occur if someone is already in the group chat with the same nickname.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - isJoined
```
public boolean isJoined()
```
    Returns true if currently in the multi user chat (after calling the join(String) method).
    
    Returns:
    true if currently in the multi user chat room.
  - leave
```
public void leave()
           throws SmackException.NotConnectedException
```
    Leave the chat room.
    
    Throws:
    
    SmackException.NotConnectedException
  - getConfigurationForm
```
public Form getConfigurationForm()
                          throws SmackException.NoResponseException,
                                 XMPPException.XMPPErrorException,
                                 SmackException.NotConnectedException
```
    Returns the room's configuration form that the room's owner can use or null if no configuration is possible. The configuration form allows to set the room's language, enable logging, specify room's type, etc..
    
    Returns:
    the Form that contains the fields to complete together with the instrucions or null if no configuration is possible.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs asking the configuration form for the room.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - sendConfigurationForm
```
public void sendConfigurationForm(Form form)
                           throws SmackException.NoResponseException,
                                  XMPPException.XMPPErrorException,
                                  SmackException.NotConnectedException
```
    Sends the completed configuration form to the server. The room will be configured with the new settings defined in the form. If the form is empty then the server will create an instant room (will use default configuration).
    
    Parameters:
    form - the form with the new settings.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs setting the new rooms' configuration.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - getRegistrationForm
```
public Form getRegistrationForm()
                         throws SmackException.NoResponseException,
                                XMPPException.XMPPErrorException,
                                SmackException.NotConnectedException
```
    Returns the room's registration form that an unaffiliated user, can use to become a member of the room or null if no registration is possible. Some rooms may restrict the privilege to register members and allow only room admins to add new members.
    If the user requesting registration requirements is not allowed to register with the room (e.g. because that privilege has been restricted), the room will return a "Not Allowed" error to the user (error code 405).
    
    Returns:
    the registration Form that contains the fields to complete together with the instrucions or null if no registration is possible.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs asking the registration form for the room or a 405 error if the user is not allowed to register with the room.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - sendRegistrationForm
```
public void sendRegistrationForm(Form form)
                          throws SmackException.NoResponseException,
                                 XMPPException.XMPPErrorException,
                                 SmackException.NotConnectedException
```
    Sends the completed registration form to the server. After the user successfully submits the form, the room may queue the request for review by the room admins or may immediately add the user to the member list by changing the user's affiliation from "none" to "member.
    If the desired room nickname is already reserved for that room, the room will return a "Conflict" error to the user (error code 409). If the room does not support registration, it will return a "Service Unavailable" error to the user (error code 503).
    
    Parameters:
    form - the completed registration form.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs submitting the registration form. In particular, a 409 error can occur if the desired room nickname is already reserved for that room; or a 503 error can occur if the room does not support registration.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - destroy
```
public void destroy(String reason,
           String alternateJID)
             throws SmackException.NoResponseException,
                    XMPPException.XMPPErrorException,
                    SmackException.NotConnectedException
```
    Sends a request to the server to destroy the room. The sender of the request should be the room's owner. If the sender of the destroy request is not the room's owner then the server will answer a "Forbidden" error (403).
    
    Parameters:
    reason - the reason for the room destruction.
    alternateJID - the JID of an alternate location.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs while trying to destroy the room. An error can occur which will be wrapped by an XMPPException -- XMPP error code 403. The error code can be used to present more appropiate error messages to end-users.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - invite
```
public void invite(String user,
          String reason)
            throws SmackException.NotConnectedException
```
    Invites another user to the room in which one is an occupant. The invitation will be sent to the room which in turn will forward the invitation to the invitee.
    If the room is password-protected, the invitee will receive a password to use to join the room. If the room is members-only, the the invitee may be added to the member list.
    
    Parameters:
    user - the user to invite to the room.(e.g. hecate@shakespeare.lit)
    reason - the reason why the user is being invited.
    
    Throws:
    
    SmackException.NotConnectedException
  - invite
```
public void invite(Message message,
          String user,
          String reason)
            throws SmackException.NotConnectedException
```
    Invites another user to the room in which one is an occupant using a given Message. The invitation will be sent to the room which in turn will forward the invitation to the invitee.
    If the room is password-protected, the invitee will receive a password to use to join the room. If the room is members-only, the the invitee may be added to the member list.
    
    Parameters:
    message - the message to use for sending the invitation.
    user - the user to invite to the room.(e.g. hecate@shakespeare.lit)
    reason - the reason why the user is being invited.
    
    Throws:
    
    SmackException.NotConnectedException
  - decline
```
public static void decline(XMPPConnection conn,
           String room,
           String inviter,
           String reason)
                    throws SmackException.NotConnectedException
```
    Informs the sender of an invitation that the invitee declines the invitation. The rejection will be sent to the room which in turn will forward the rejection to the inviter.
    
    Parameters:
    conn - the connection to use for sending the rejection.
    room - the room that sent the original invitation.
    inviter - the inviter of the declined invitation.
    reason - the reason why the invitee is declining the invitation.
    
    Throws:
    
    SmackException.NotConnectedException
  - addInvitationListener
```
public static void addInvitationListener(XMPPConnection conn,
                         InvitationListener listener)
```
    Adds a listener to invitation notifications. The listener will be fired anytime an invitation is received.
    
    Parameters:
    conn - the connection where the listener will be applied.
    listener - an invitation listener.
  - removeInvitationListener
```
public static void removeInvitationListener(XMPPConnection conn,
                            InvitationListener listener)
```
    Removes a listener to invitation notifications. The listener will be fired anytime an invitation is received.
    
    Parameters:
    conn - the connection where the listener was applied.
    listener - an invitation listener.
  - addInvitationRejectionListener
```
public void addInvitationRejectionListener(InvitationRejectionListener listener)
```
    Adds a listener to invitation rejections notifications. The listener will be fired anytime an invitation is declined.
    
    Parameters:
    listener - an invitation rejection listener.
  - removeInvitationRejectionListener
```
public void removeInvitationRejectionListener(InvitationRejectionListener listener)
```
    Removes a listener from invitation rejections notifications. The listener will be fired anytime an invitation is declined.
    
    Parameters:
    listener - an invitation rejection listener.
  - addSubjectUpdatedListener
```
public void addSubjectUpdatedListener(SubjectUpdatedListener listener)
```
    Adds a listener to subject change notifications. The listener will be fired anytime the room's subject changes.
    
    Parameters:
    listener - a subject updated listener.
  - removeSubjectUpdatedListener
```
public void removeSubjectUpdatedListener(SubjectUpdatedListener listener)
```
    Removes a listener from subject change notifications. The listener will be fired anytime the room's subject changes.
    
    Parameters:
    listener - a subject updated listener.
  - addPresenceInterceptor
```
public void addPresenceInterceptor(PacketInterceptor presenceInterceptor)
```
    Adds a new PacketInterceptor that will be invoked every time a new presence is going to be sent by this MultiUserChat to the server. Packet interceptors may add new extensions to the presence that is going to be sent to the MUC service.
    
    Parameters:
    presenceInterceptor - the new packet interceptor that will intercept presence packets.
  - removePresenceInterceptor
```
public void removePresenceInterceptor(PacketInterceptor presenceInterceptor)
```
    Removes a PacketInterceptor that was being invoked every time a new presence was being sent by this MultiUserChat to the server. Packet interceptors may add new extensions to the presence that is going to be sent to the MUC service.
    
    Parameters:
    presenceInterceptor - the packet interceptor to remove.
  - getSubject
```
public String getSubject()
```
    Returns the last known room's subject or null if the user hasn't joined the room or the room does not have a subject yet. In case the room has a subject, as soon as the user joins the room a message with the current room's subject will be received.
    To be notified every time the room's subject change you should add a listener to this room. addSubjectUpdatedListener(SubjectUpdatedListener)
    To change the room's subject use changeSubject(String).
    
    Returns:
    the room's subject or null if the user hasn't joined the room or the room does not have a subject yet.
  - getReservedNickname
```
public String getReservedNickname()
                           throws SmackException
```
    Returns the reserved room nickname for the user in the room. A user may have a reserved nickname, for example through explicit room registration or database integration. In such cases it may be desirable for the user to discover the reserved nickname before attempting to enter the room.
    
    Returns:
    the reserved room nickname or null if none.
    
    Throws:
    
    SmackException - if there was no response from the server.
  - getNickname
```
public String getNickname()
```
    Returns the nickname that was used to join the room, or null if not currently joined.
    
    Returns:
    the nickname currently being used.
  - changeNickname
```
public void changeNickname(String nickname)
                    throws SmackException.NoResponseException,
                           XMPPException.XMPPErrorException,
                           SmackException.NotConnectedException
```
    Changes the occupant's nickname to a new nickname within the room. Each room occupant will receive two presence packets. One of type "unavailable" for the old nickname and one indicating availability for the new nickname. The unavailable presence will contain the new nickname and an appropriate status code (namely 303) as extended presence information. The status code 303 indicates that the occupant is changing his/her nickname.
    
    Parameters:
    nickname - the new nickname within the room.
    
    Throws:
    
    XMPPException.XMPPErrorException - if the new nickname is already in use by another occupant.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - changeAvailabilityStatus
```
public void changeAvailabilityStatus(String status,
                            Presence.Mode mode)
                              throws SmackException.NotConnectedException
```
    Changes the occupant's availability status within the room. The presence type will remain available but with a new status that describes the presence update and a new presence mode (e.g. Extended away).
    
    Parameters:
    status - a text message describing the presence update.
    mode - the mode type for the presence update.
    
    Throws:
    
    SmackException.NotConnectedException
  - kickParticipant
```
public void kickParticipant(String nickname,
                   String reason)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException
```
    Kicks a visitor or participant from the room. The kicked occupant will receive a presence of type "unavailable" including a status code 307 and optionally along with the reason (if provided) and the bare JID of the user who initiated the kick. After the occupant was kicked from the room, the rest of the occupants will receive a presence of type "unavailable". The presence will include a status code 307 which means that the occupant was kicked from the room.
    
    Parameters:
    nickname - the nickname of the participant or visitor to kick from the room (e.g. "john").
    reason - the reason why the participant or visitor is being kicked from the room.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs kicking the occupant. In particular, a 405 error can occur if a moderator or a user with an affiliation of "owner" or "admin" was intended to be kicked (i.e. Not Allowed error); or a 403 error can occur if the occupant that intended to kick another occupant does not have kicking privileges (i.e. Forbidden error); or a 400 error can occur if the provided nickname is not present in the room.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantVoice
```
public void grantVoice(Collection<String> nicknames)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException
```
    Grants voice to visitors in the room. In a moderated room, a moderator may want to manage who does and does not have "voice" in the room. To have voice means that a room occupant is able to send messages to the room occupants.
    
    Parameters:
    nicknames - the nicknames of the visitors to grant voice in the room (e.g. "john").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting voice to a visitor. In particular, a 403 error can occur if the occupant that intended to grant voice is not a moderator in this room (i.e. Forbidden error); or a 400 error can occur if the provided nickname is not present in the room.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantVoice
```
public void grantVoice(String nickname)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException
```
    Grants voice to a visitor in the room. In a moderated room, a moderator may want to manage who does and does not have "voice" in the room. To have voice means that a room occupant is able to send messages to the room occupants.
    
    Parameters:
    nickname - the nickname of the visitor to grant voice in the room (e.g. "john").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting voice to a visitor. In particular, a 403 error can occur if the occupant that intended to grant voice is not a moderator in this room (i.e. Forbidden error); or a 400 error can occur if the provided nickname is not present in the room.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeVoice
```
public void revokeVoice(Collection<String> nicknames)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException
```
    Revokes voice from participants in the room. In a moderated room, a moderator may want to revoke an occupant's privileges to speak. To have voice means that a room occupant is able to send messages to the room occupants.
    
    Parameters:
    nicknames - the nicknames of the participants to revoke voice (e.g. "john").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking voice from a participant. In particular, a 405 error can occur if a moderator or a user with an affiliation of "owner" or "admin" was tried to revoke his voice (i.e. Not Allowed error); or a 400 error can occur if the provided nickname is not present in the room.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeVoice
```
public void revokeVoice(String nickname)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException
```
    Revokes voice from a participant in the room. In a moderated room, a moderator may want to revoke an occupant's privileges to speak. To have voice means that a room occupant is able to send messages to the room occupants.
    
    Parameters:
    nickname - the nickname of the participant to revoke voice (e.g. "john").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking voice from a participant. In particular, a 405 error can occur if a moderator or a user with an affiliation of "owner" or "admin" was tried to revoke his voice (i.e. Not Allowed error); or a 400 error can occur if the provided nickname is not present in the room.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - banUsers
```
public void banUsers(Collection<String> jids)
              throws XMPPException.XMPPErrorException,
                     SmackException.NoResponseException,
                     SmackException.NotConnectedException
```
    Bans users from the room. An admin or owner of the room can ban users from a room. This means that the banned user will no longer be able to join the room unless the ban has been removed. If the banned user was present in the room then he/she will be removed from the room and notified that he/she was banned along with the reason (if provided) and the bare XMPP user ID of the user who initiated the ban.
    
    Parameters:
    jids - the bare XMPP user IDs of the users to ban.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs banning a user. In particular, a 405 error can occur if a moderator or a user with an affiliation of "owner" or "admin" was tried to be banned (i.e. Not Allowed error).
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - banUser
```
public void banUser(String jid,
           String reason)
             throws XMPPException.XMPPErrorException,
                    SmackException.NoResponseException,
                    SmackException.NotConnectedException
```
    Bans a user from the room. An admin or owner of the room can ban users from a room. This means that the banned user will no longer be able to join the room unless the ban has been removed. If the banned user was present in the room then he/she will be removed from the room and notified that he/she was banned along with the reason (if provided) and the bare XMPP user ID of the user who initiated the ban.
    
    Parameters:
    jid - the bare XMPP user ID of the user to ban (e.g. "user@host.org").
    reason - the optional reason why the user was banned.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs banning a user. In particular, a 405 error can occur if a moderator or a user with an affiliation of "owner" or "admin" was tried to be banned (i.e. Not Allowed error).
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantMembership
```
public void grantMembership(Collection<String> jids)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException
```
    Grants membership to other users. Only administrators are able to grant membership. A user that becomes a room member will be able to enter a room of type Members-Only (i.e. a room that a user cannot enter without being on the member list).
    
    Parameters:
    jids - the XMPP user IDs of the users to grant membership.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting membership to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantMembership
```
public void grantMembership(String jid)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException
```
    Grants membership to a user. Only administrators are able to grant membership. A user that becomes a room member will be able to enter a room of type Members-Only (i.e. a room that a user cannot enter without being on the member list).
    
    Parameters:
    jid - the XMPP user ID of the user to grant membership (e.g. "user@host.org").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting membership to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeMembership
```
public void revokeMembership(Collection<String> jids)
                      throws XMPPException.XMPPErrorException,
                             SmackException.NoResponseException,
                             SmackException.NotConnectedException
```
    Revokes users' membership. Only administrators are able to revoke membership. A user that becomes a room member will be able to enter a room of type Members-Only (i.e. a room that a user cannot enter without being on the member list). If the user is in the room and the room is of type members-only then the user will be removed from the room.
    
    Parameters:
    jids - the bare XMPP user IDs of the users to revoke membership.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking membership to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeMembership
```
public void revokeMembership(String jid)
                      throws XMPPException.XMPPErrorException,
                             SmackException.NoResponseException,
                             SmackException.NotConnectedException
```
    Revokes a user's membership. Only administrators are able to revoke membership. A user that becomes a room member will be able to enter a room of type Members-Only (i.e. a room that a user cannot enter without being on the member list). If the user is in the room and the room is of type members-only then the user will be removed from the room.
    
    Parameters:
    jid - the bare XMPP user ID of the user to revoke membership (e.g. "user@host.org").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking membership to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantModerator
```
public void grantModerator(Collection<String> nicknames)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException
```
    Grants moderator privileges to participants or visitors. Room administrators may grant moderator privileges. A moderator is allowed to kick users, grant and revoke voice, invite other users, modify room's subject plus all the partcipants privileges.
    
    Parameters:
    nicknames - the nicknames of the occupants to grant moderator privileges.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting moderator privileges to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantModerator
```
public void grantModerator(String nickname)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException
```
    Grants moderator privileges to a participant or visitor. Room administrators may grant moderator privileges. A moderator is allowed to kick users, grant and revoke voice, invite other users, modify room's subject plus all the partcipants privileges.
    
    Parameters:
    nickname - the nickname of the occupant to grant moderator privileges.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting moderator privileges to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeModerator
```
public void revokeModerator(Collection<String> nicknames)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException
```
    Revokes moderator privileges from other users. The occupant that loses moderator privileges will become a participant. Room administrators may revoke moderator privileges only to occupants whose affiliation is member or none. This means that an administrator is not allowed to revoke moderator privileges from other room administrators or owners.
    
    Parameters:
    nicknames - the nicknames of the occupants to revoke moderator privileges.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking moderator privileges from a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeModerator
```
public void revokeModerator(String nickname)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException
```
    Revokes moderator privileges from another user. The occupant that loses moderator privileges will become a participant. Room administrators may revoke moderator privileges only to occupants whose affiliation is member or none. This means that an administrator is not allowed to revoke moderator privileges from other room administrators or owners.
    
    Parameters:
    nickname - the nickname of the occupant to revoke moderator privileges.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking moderator privileges from a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantOwnership
```
public void grantOwnership(Collection<String> jids)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException
```
    Grants ownership privileges to other users. Room owners may grant ownership privileges. Some room implementations will not allow to grant ownership privileges to other users. An owner is allowed to change defining room features as well as perform all administrative functions.
    
    Parameters:
    jids - the collection of bare XMPP user IDs of the users to grant ownership.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting ownership privileges to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantOwnership
```
public void grantOwnership(String jid)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException
```
    Grants ownership privileges to another user. Room owners may grant ownership privileges. Some room implementations will not allow to grant ownership privileges to other users. An owner is allowed to change defining room features as well as perform all administrative functions.
    
    Parameters:
    jid - the bare XMPP user ID of the user to grant ownership (e.g. "user@host.org").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting ownership privileges to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeOwnership
```
public void revokeOwnership(Collection<String> jids)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException
```
    Revokes ownership privileges from other users. The occupant that loses ownership privileges will become an administrator. Room owners may revoke ownership privileges. Some room implementations will not allow to grant ownership privileges to other users.
    
    Parameters:
    jids - the bare XMPP user IDs of the users to revoke ownership.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking ownership privileges from a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeOwnership
```
public void revokeOwnership(String jid)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException
```
    Revokes ownership privileges from another user. The occupant that loses ownership privileges will become an administrator. Room owners may revoke ownership privileges. Some room implementations will not allow to grant ownership privileges to other users.
    
    Parameters:
    jid - the bare XMPP user ID of the user to revoke ownership (e.g. "user@host.org").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking ownership privileges from a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantAdmin
```
public void grantAdmin(Collection<String> jids)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException
```
    Grants administrator privileges to other users. Room owners may grant administrator privileges to a member or unaffiliated user. An administrator is allowed to perform administrative functions such as banning users and edit moderator list.
    
    Parameters:
    jids - the bare XMPP user IDs of the users to grant administrator privileges.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting administrator privileges to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - grantAdmin
```
public void grantAdmin(String jid)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException
```
    Grants administrator privileges to another user. Room owners may grant administrator privileges to a member or unaffiliated user. An administrator is allowed to perform administrative functions such as banning users and edit moderator list.
    
    Parameters:
    jid - the bare XMPP user ID of the user to grant administrator privileges (e.g. "user@host.org").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs granting administrator privileges to a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeAdmin
```
public void revokeAdmin(Collection<String> jids)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException
```
    Revokes administrator privileges from users. The occupant that loses administrator privileges will become a member. Room owners may revoke administrator privileges from a member or unaffiliated user.
    
    Parameters:
    jids - the bare XMPP user IDs of the user to revoke administrator privileges.
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking administrator privileges from a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - revokeAdmin
```
public void revokeAdmin(String jid)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException
```
    Revokes administrator privileges from a user. The occupant that loses administrator privileges will become a member. Room owners may revoke administrator privileges from a member or unaffiliated user.
    
    Parameters:
    jid - the bare XMPP user ID of the user to revoke administrator privileges (e.g. "user@host.org").
    
    Throws:
    
    XMPPException.XMPPErrorException - if an error occurs revoking administrator privileges from a user.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - getOccupantsCount
```
public int getOccupantsCount()
```
    Returns the number of occupants in the group chat.
    Note: this value will only be accurate after joining the group chat, and may fluctuate over time. If you query this value directly after joining the group chat it may not be accurate, as it takes a certain amount of time for the server to send all presence packets to this client.
    
    Returns:
    the number of occupants in the group chat.
  - getOccupants
```
public List<String> getOccupants()
```
    Returns an Iterator (of Strings) for the list of fully qualified occupants in the group chat. For example, "conference@chat.jivesoftware.com/SomeUser". Typically, a client would only display the nickname of the occupant. To get the nickname from the fully qualified name, use the StringUtils.parseResource(String) method. Note: this value will only be accurate after joining the group chat, and may fluctuate over time.
    
    Returns:
    a List of the occupants in the group chat.
  - getOccupantPresence
```
public Presence getOccupantPresence(String user)
```
    Returns the presence info for a particular user, or null if the user is not in the room.
    
    Parameters:
    user - the room occupant to search for his presence. The format of user must be: roomName@service/nickname (e.g. darkcave@macbeth.shakespeare.lit/thirdwitch).
    
    Returns:
    the occupant's current presence, or null if the user is unavailable or if no presence information is available.
  - getOccupant
```
public Occupant getOccupant(String user)
```
    Returns the Occupant information for a particular occupant, or null if the user is not in the room. The Occupant object may include information such as full JID of the user as well as the role and affiliation of the user in the room.
    
    Parameters:
    user - the room occupant to search for his presence. The format of user must be: roomName@service/nickname (e.g. darkcave@macbeth.shakespeare.lit/thirdwitch).
    
    Returns:
    the Occupant or null if the user is unavailable (i.e. not in the room).
  - addParticipantListener
```
public void addParticipantListener(PacketListener listener)
```
    Adds a packet listener that will be notified of any new Presence packets sent to the group chat. Using a listener is a suitable way to know when the list of occupants should be re-loaded due to any changes.
    
    Parameters:
    listener - a packet listener that will be notified of any presence packets sent to the group chat.
  - removeParticipantListener
```
public void removeParticipantListener(PacketListener listener)
```
    Remoces a packet listener that was being notified of any new Presence packets sent to the group chat.
    
    Parameters:
    listener - a packet listener that was being notified of any presence packets sent to the group chat.
  - getOwners
```
public Collection<Affiliate> getOwners()
                                throws SmackException.NoResponseException,
                                       XMPPException.XMPPErrorException,
                                       SmackException.NotConnectedException
```
    Returns a collection of Affiliate with the room owners.
    
    Returns:
    a collection of Affiliate with the room owners.
    
    Throws:
    
    XMPPException.XMPPErrorException - if you don't have enough privileges to get this information.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - getAdmins
```
public Collection<Affiliate> getAdmins()
                                throws SmackException.NoResponseException,
                                       XMPPException.XMPPErrorException,
                                       SmackException.NotConnectedException
```
    Returns a collection of Affiliate with the room administrators.
    
    Returns:
    a collection of Affiliate with the room administrators.
    
    Throws:
    
    XMPPException.XMPPErrorException - if you don't have enough privileges to get this information.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - getMembers
```
public Collection<Affiliate> getMembers()
                                 throws SmackException.NoResponseException,
                                        XMPPException.XMPPErrorException,
                                        SmackException.NotConnectedException
```
    Returns a collection of Affiliate with the room members.
    
    Returns:
    a collection of Affiliate with the room members.
    
    Throws:
    
    XMPPException.XMPPErrorException - if you don't have enough privileges to get this information.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - getOutcasts
```
public Collection<Affiliate> getOutcasts()
                                  throws SmackException.NoResponseException,
                                         XMPPException.XMPPErrorException,
                                         SmackException.NotConnectedException
```
    Returns a collection of Affiliate with the room outcasts.
    
    Returns:
    a collection of Affiliate with the room outcasts.
    
    Throws:
    
    XMPPException.XMPPErrorException - if you don't have enough privileges to get this information.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - getModerators
```
public Collection<Occupant> getModerators()
                                   throws SmackException.NoResponseException,
                                          XMPPException.XMPPErrorException,
                                          SmackException.NotConnectedException
```
    Returns a collection of Occupant with the room moderators.
    
    Returns:
    a collection of Occupant with the room moderators.
    
    Throws:
    
    XMPPException.XMPPErrorException - if you don't have enough privileges to get this information.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - getParticipants
```
public Collection<Occupant> getParticipants()
                                     throws SmackException.NoResponseException,
                                            XMPPException.XMPPErrorException,
                                            SmackException.NotConnectedException
```
    Returns a collection of Occupant with the room participants.
    
    Returns:
    a collection of Occupant with the room participants.
    
    Throws:
    
    XMPPException.XMPPErrorException - if you don't have enough privileges to get this information.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - sendMessage
```
public void sendMessage(String text)
                 throws XMPPException,
                        SmackException.NotConnectedException
```
    Sends a message to the chat room.
    
    Parameters:
    text - the text of the message to send.
    
    Throws:
    
    XMPPException - if sending the message fails.
    
    SmackException.NotConnectedException
  - createPrivateChat
```
public Chat createPrivateChat(String occupant,
                     MessageListener listener)
```
    Returns a new Chat for sending private messages to a given room occupant. The Chat's occupant address is the room's JID (i.e. roomName@service/nick). The server service will change the 'from' address to the sender's room JID and delivering the message to the intended recipient's full JID.
    
    Parameters:
    occupant - occupant unique room JID (e.g. 'darkcave@macbeth.shakespeare.lit/Paul').
    listener - the listener is a message listener that will handle messages for the newly created chat.
    
    Returns:
    new Chat for sending private messages to a given room occupant.
  - createMessage
```
public Message createMessage()
```
    Creates a new Message to send to the chat room.
    
    Returns:
    a new Message addressed to the chat room.
  - sendMessage
```
public void sendMessage(Message message)
                 throws XMPPException,
                        SmackException.NotConnectedException
```
    Sends a Message to the chat room.
    
    Parameters:
    message - the message.
    
    Throws:
    
    XMPPException - if sending the message fails.
    
    SmackException.NotConnectedException
  - pollMessage
```
public Message pollMessage()
```
    Polls for and returns the next message, or null if there isn't a message immediately available. This method provides significantly different functionalty than the nextMessage() method since it's non-blocking. In other words, the method call will always return immediately, whereas the nextMessage method will return only when a message is available (or after a specific timeout).
    
    Returns:
    the next message if one is immediately available and null otherwise.
  - nextMessage
```
public Message nextMessage()
```
    Returns the next available message in the chat. The method call will block (not return) until a message is available.
    
    Returns:
    the next message.
  - nextMessage
```
public Message nextMessage(long timeout)
```
    Returns the next available message in the chat. The method call will block (not return) until a packet is available or the timeout has elapased. If the timeout elapses without a result, null will be returned.
    
    Parameters:
    timeout - the maximum amount of time to wait for the next message.
    
    Returns:
    the next message, or null if the timeout elapses without a message becoming available.
  - addMessageListener
```
public void addMessageListener(PacketListener listener)
```
    Adds a packet listener that will be notified of any new messages in the group chat. Only "group chat" messages addressed to this group chat will be delivered to the listener. If you wish to listen for other packets that may be associated with this group chat, you should register a PacketListener directly with the XMPPConnection with the appropriate PacketListener.
    
    Parameters:
    listener - a packet listener.
  - removeMessageListener
```
public void removeMessageListener(PacketListener listener)
```
    Removes a packet listener that was being notified of any new messages in the multi user chat. Only "group chat" messages addressed to this multi user chat were being delivered to the listener.
    
    Parameters:
    listener - a packet listener.
  - changeSubject
```
public void changeSubject(String subject)
                   throws SmackException.NoResponseException,
                          XMPPException.XMPPErrorException,
                          SmackException.NotConnectedException
```
    Changes the subject within the room. As a default, only users with a role of "moderator" are allowed to change the subject in a room. Although some rooms may be configured to allow a mere participant or even a visitor to change the subject.
    
    Parameters:
    subject - the new room's subject to set.
    
    Throws:
    
    XMPPException.XMPPErrorException - if someone without appropriate privileges attempts to change the room subject will throw an error with code 403 (i.e. Forbidden)
    
    SmackException.NoResponseException - if there was no response from the server.
    
    SmackException.NotConnectedException
  - addUserStatusListener
```
public void addUserStatusListener(UserStatusListener listener)
```
    Adds a listener that will be notified of changes in your status in the room such as the user being kicked, banned, or granted admin permissions.
    
    Parameters:
    listener - a user status listener.
  - removeUserStatusListener
```
public void removeUserStatusListener(UserStatusListener listener)
```
    Removes a listener that was being notified of changes in your status in the room such as the user being kicked, banned, or granted admin permissions.
    
    Parameters:
    listener - a user status listener.
  - addParticipantStatusListener
```
public void addParticipantStatusListener(ParticipantStatusListener listener)
```
    Adds a listener that will be notified of changes in occupants status in the room such as the user being kicked, banned, or granted admin permissions.
    
    Parameters:
    listener - a participant status listener.
  - removeParticipantStatusListener
```
public void removeParticipantStatusListener(ParticipantStatusListener listener)
```
    Removes a listener that was being notified of changes in occupants status in the room such as the user being kicked, banned, or granted admin permissions.
    
    Parameters:
    listener - a participant status listener.
  - finalize
```
protected void finalize()
                 throws Throwable
```
    Overrides:
    
    finalize in class Object
    
    Throws:
    
    Throwable

Class MultiUserChat

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

MultiUserChat

Method Detail

isServiceEnabled

getJoinedRooms

getRoomInfo

getServiceNames

getHostedRooms

getRoom

create

createOrJoin

join

join

join

isJoined

leave

getConfigurationForm

sendConfigurationForm

getRegistrationForm

sendRegistrationForm

destroy

invite

invite

decline

addInvitationListener

removeInvitationListener

addInvitationRejectionListener

removeInvitationRejectionListener

addSubjectUpdatedListener

removeSubjectUpdatedListener

addPresenceInterceptor

removePresenceInterceptor

getSubject

getReservedNickname

getNickname

changeNickname

changeAvailabilityStatus

kickParticipant

grantVoice

grantVoice

revokeVoice

revokeVoice

banUsers

banUser

grantMembership

grantMembership

revokeMembership

revokeMembership

grantModerator

grantModerator

revokeModerator

revokeModerator

grantOwnership

grantOwnership

revokeOwnership

revokeOwnership

grantAdmin

grantAdmin

revokeAdmin

revokeAdmin

getOccupantsCount

getOccupants

getOccupantPresence

getOccupant

addParticipantListener

removeParticipantListener

getOwners

getAdmins

getMembers

getOutcasts

getModerators

getParticipants

sendMessage

createPrivateChat

createMessage

sendMessage