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

```
public class MultiUserChat
extends Object
```
A MultiUserChat room (XEP-45), created with MultiUserChatManager.getMultiUserChat(EntityBareJid).
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 affiliations 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.).

Note: Make sure to leave the MUC (leave()) when you don't need it anymore or otherwise you may leak the instance.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

class MultiUserChat.MucCreateConfigFormHandle
A handle used to configure a newly created room.

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`boolean`	`addInvitationRejectionListener(InvitationRejectionListener listener)`	Adds a listener to invitation rejections notifications.
`boolean`	`addMessageListener(MessageListener listener)`	Adds a stanza listener that will be notified of any new messages in the group chat.
`boolean`	`addParticipantListener(PresenceListener listener)`	Adds a stanza listener that will be notified of any new Presence packets sent to the group chat.
`boolean`	`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(PresenceListener presenceInterceptor)`	Adds a new `StanzaListener` that will be invoked every time a new presence is going to be sent by this MultiUserChat to the server.
`boolean`	`addSubjectUpdatedListener(SubjectUpdatedListener listener)`	Adds a listener to subject change notifications.
`boolean`	`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(Jid jid, String reason)`	Bans a user from the room.
`void`	`banUsers(Collection<? extends Jid> jids)`	Bans users from the room.
`MessageBuilder`	`buildMessage()`	Constructs a new message builder for messages send to this MUC room.
`void`	`changeAvailabilityStatus(String status, Presence.Mode mode)`	Changes the occupant's availability status within the room.
`void`	`changeNickname(Resourcepart nickname)`	Changes the occupant's nickname to a new nickname within the room.
`void`	`changeSubject(String subject)`	Changes the subject within the room.
`MultiUserChat.MucCreateConfigFormHandle`	`create(Resourcepart 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()`	Deprecated. use `buildMessage()` instead.
`MultiUserChat.MucCreateConfigFormHandle`	`createOrJoin(MucEnterConfiguration mucEnterConfiguration)`	Like `create(Resourcepart)`, but will return a `MultiUserChat.MucCreateConfigFormHandle` if the room creation was acknowledged by the service (with an 201 status code).
`MultiUserChat.MucCreateConfigFormHandle`	`createOrJoin(Resourcepart nickname)`	Create or join the MUC room with the given nickname.
`MultiUserChat.MucCreateConfigFormHandle`	`createOrJoinIfNecessary(Resourcepart nickname, String password)`	Create or join a MUC if it is necessary, i.e.
`Chat`	`createPrivateChat(EntityFullJid occupant, ChatMessageListener listener)`	Returns a new Chat for sending private messages to a given room occupant.
`void`	`destroy(String reason, EntityBareJid alternateJID)`	Sends a request to the server to destroy the room.
`List<Affiliate>`	`getAdmins()`	Returns a list of `Affiliate` with the room administrators.
`MucConfigFormManager`	`getConfigFormManager()`	Get a `MucConfigFormManager` to configure this room.
`Form`	`getConfigurationForm()`	Returns the room's configuration form that the room's owner can use or `null` if no configuration is possible.
`MucEnterConfiguration.Builder`	`getEnterConfigurationBuilder(Resourcepart nickname)`	Get a new MUC enter configuration builder.
`List<Affiliate>`	`getMembers()`	Returns a list of `Affiliate` with the room members.
`List<Occupant>`	`getModerators()`	Returns a list of `Occupant` with the room moderators.
`Resourcepart`	`getNickname()`	Returns the nickname that was used to join the room, or `null` if not currently joined.
`Occupant`	`getOccupant(EntityFullJid user)`	Returns the Occupant information for a particular occupant, or `null` if the user is not in the room.
`Presence`	`getOccupantPresence(EntityFullJid user)`	Returns the presence info for a particular user, or `null` if the user is not in the room.
`List<EntityFullJid>`	`getOccupants()`	Returns an List for the list of fully qualified occupants in the group chat.
`int`	`getOccupantsCount()`	Returns the number of occupants in the group chat.
`List<Affiliate>`	`getOutcasts()`	Returns a list of `Affiliate` with the room outcasts.
`List<Affiliate>`	`getOwners()`	Returns a list of `Affiliate` with the room owners.
`List<Occupant>`	`getParticipants()`	Returns a list 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.
`EntityBareJid`	`getRoom()`	Returns the name of the room this MultiUserChat object represents.
`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.
`XMPPConnection`	`getXmppConnection()`	Get the XMPP connection associated with this chat instance.
`void`	`grantAdmin(Collection<? extends Jid> jids)`	Grants administrator privileges to other users.
`void`	`grantAdmin(Jid jid)`	Grants administrator privileges to another user.
`void`	`grantMembership(Collection<? extends Jid> jids)`	Grants membership to other users.
`void`	`grantMembership(Jid jid)`	Grants membership to a user.
`void`	`grantModerator(Collection<Resourcepart> nicknames)`	Grants moderator privileges to participants or visitors.
`void`	`grantModerator(Resourcepart nickname)`	Grants moderator privileges to a participant or visitor.
`void`	`grantOwnership(Collection<? extends Jid> jids)`	Grants ownership privileges to other users.
`void`	`grantOwnership(Jid jid)`	Grants ownership privileges to another user.
`void`	`grantVoice(Collection<Resourcepart> nicknames)`	Grants voice to visitors in the room.
`void`	`grantVoice(Resourcepart nickname)`	Grants voice to a visitor in the room.
`void`	`invite(MessageBuilder messageBuilder, EntityBareJid user, String reason)`	Invites another user to the room in which one is an occupant using a given Message.
`void`	`invite(Message message, EntityBareJid user, String reason)`	Deprecated. use `invite(MessageBuilder, EntityBareJid, String)` instead.
`void`	`invite(EntityBareJid 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(Resourcepart)` method).
`void`	`join(MucEnterConfiguration mucEnterConfiguration)`	Joins the chat room using the specified nickname and password.
`void`	`join(Resourcepart nickname)`	Joins the chat room using the specified nickname.
`void`	`join(Resourcepart nickname, String password)`	Joins the chat room using the specified nickname and password.
`void`	`kickParticipant(Resourcepart nickname, String reason)`	Kicks a visitor or participant from the room.
`Presence`	`leave()`	Leave the chat room.
`Presence`	`leaveSync()`	Deprecated. use `leave()` instead.
`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.
`boolean`	`removeInvitationRejectionListener(InvitationRejectionListener listener)`	Removes a listener from invitation rejections notifications.
`boolean`	`removeMessageListener(MessageListener listener)`	Removes a stanza listener that was being notified of any new messages in the multi user chat.
`boolean`	`removeParticipantListener(PresenceListener listener)`	Removes a stanza listener that was being notified of any new Presence packets sent to the group chat.
`boolean`	`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(PresenceListener presenceInterceptor)`	Removes a `StanzaListener` that was being invoked every time a new presence was being sent by this MultiUserChat to the server.
`boolean`	`removeSubjectUpdatedListener(SubjectUpdatedListener listener)`	Removes a listener from subject change notifications.
`boolean`	`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`	`requestVoice()`	Sends a voice request to the MUC.
`void`	`revokeAdmin(Collection<? extends Jid> jids)`	Revokes administrator privileges from users.
`void`	`revokeAdmin(EntityJid jid)`	Revokes administrator privileges from a user.
`void`	`revokeMembership(Collection<? extends Jid> jids)`	Revokes users' membership.
`void`	`revokeMembership(Jid jid)`	Revokes a user's membership.
`void`	`revokeModerator(Collection<Resourcepart> nicknames)`	Revokes moderator privileges from other users.
`void`	`revokeModerator(Resourcepart nickname)`	Revokes moderator privileges from another user.
`void`	`revokeOwnership(Collection<? extends Jid> jids)`	Revokes ownership privileges from other users.
`void`	`revokeOwnership(Jid jid)`	Revokes ownership privileges from another user.
`void`	`revokeVoice(Collection<Resourcepart> nicknames)`	Revokes voice from participants in the room.
`void`	`revokeVoice(Resourcepart nickname)`	Revokes voice from a participant in the room.
`void`	`sendConfigurationForm(FillableForm form)`	Sends the completed configuration form to the server.
`void`	`sendMessage(String text)`	Sends a message to the chat room.
`void`	`sendMessage(Message message)`	Deprecated. use `sendMessage(MessageBuilder)` instead.
`void`	`sendMessage(MessageBuilder messageBuilder)`	Sends a Message to the chat room.
`void`	`sendRegistrationForm(FillableForm form)`	Sends the completed registration form to the server.
`String`	`toString()`

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

- Method Detail
  - getRoom
```
public EntityBareJid getRoom()
```
    Returns the name of the room this MultiUserChat object represents.
    
    Returns:
    
    the multi user chat room name.
  - getEnterConfigurationBuilder
```
public MucEnterConfiguration.Builder getEnterConfigurationBuilder(Resourcepart nickname)
```
    Get a new MUC enter configuration builder.
    
    Parameters:
    
    nickname - the nickname used when entering the MUC room.
    
    Returns:
    
    a new MUC enter configuration builder.
    
    Since:
    
    4.2
  - create
```
public MultiUserChat.MucCreateConfigFormHandle create(Resourcepart nickname)
                                               throws SmackException.NoResponseException,
                                                      XMPPException.XMPPErrorException,
                                                      InterruptedException,
                                                      MultiUserChatException.MucAlreadyJoinedException,
                                                      SmackException.NotConnectedException,
                                                      MultiUserChatException.MissingMucCreationAcknowledgeException,
                                                      MultiUserChatException.NotAMucServiceException
```
    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. Simply call MultiUserChat.MucCreateConfigFormHandle.makeInstant() on the returned MultiUserChat.MucCreateConfigFormHandle.
    
    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. You can use the returned MultiUserChat.MucCreateConfigFormHandle to configure the room.
    
    Parameters:
    
    nickname - the nickname to use.
    
    Returns:
    
    a handle to the MUC create configuration form API.
    
    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.
    
    InterruptedException - if the calling thread was interrupted.
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    MultiUserChatException.MucAlreadyJoinedException - if already joined the Multi-User Chat.7y
    
    MultiUserChatException.MissingMucCreationAcknowledgeException - if there MUC creation was not acknowledged by the service.
    
    MultiUserChatException.NotAMucServiceException - if the entity is not a MUC serivce.
  - createOrJoin
```
public MultiUserChat.MucCreateConfigFormHandle createOrJoin(Resourcepart nickname)
                                                     throws SmackException.NoResponseException,
                                                            XMPPException.XMPPErrorException,
                                                            InterruptedException,
                                                            MultiUserChatException.MucAlreadyJoinedException,
                                                            SmackException.NotConnectedException,
                                                            MultiUserChatException.NotAMucServiceException
```
    Create or join the MUC room with the given nickname.
    
    Parameters:
    
    nickname - the nickname to use in the MUC room.
    
    Returns:
    
    A MultiUserChat.MucCreateConfigFormHandle if the room was created while joining, or null if the room was just joined.
    
    Throws:
    
    SmackException.NoResponseException - if there was no response from the remote entity.
    
    XMPPException.XMPPErrorException - if there was an XMPP error returned.
    
    InterruptedException - if the calling thread was interrupted.
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    MultiUserChatException.MucAlreadyJoinedException - if already joined the Multi-User Chat.7y
    
    MultiUserChatException.NotAMucServiceException - if the entity is not a MUC serivce.
  - createOrJoin
```
public MultiUserChat.MucCreateConfigFormHandle createOrJoin(MucEnterConfiguration mucEnterConfiguration)
                                                     throws SmackException.NoResponseException,
                                                            XMPPException.XMPPErrorException,
                                                            InterruptedException,
                                                            MultiUserChatException.MucAlreadyJoinedException,
                                                            SmackException.NotConnectedException,
                                                            MultiUserChatException.NotAMucServiceException
```
    Like create(Resourcepart), but will return a MultiUserChat.MucCreateConfigFormHandle 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 null is returned, the room already existed and the user is able to join right away, without sending a form.
    
    Parameters:
    
    mucEnterConfiguration - the configuration used to enter the MUC.
    
    Returns:
    
    A MultiUserChat.MucCreateConfigFormHandle if the room was created while joining, or null if the room was just joined.
    
    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.
    
    InterruptedException - if the calling thread was interrupted.
    
    MultiUserChatException.MucAlreadyJoinedException - if the MUC is already joined
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    MultiUserChatException.NotAMucServiceException - if the entity is not a MUC serivce.
  - createOrJoinIfNecessary
```
public MultiUserChat.MucCreateConfigFormHandle createOrJoinIfNecessary(Resourcepart nickname,
                                                                       String password)
                                                                throws SmackException.NoResponseException,
                                                                       XMPPException.XMPPErrorException,
                                                                       SmackException.NotConnectedException,
                                                                       InterruptedException,
                                                                       MultiUserChatException.NotAMucServiceException
```
    Create or join a MUC if it is necessary, i.e. if not the MUC is not already joined.
    
    Parameters:
    
    nickname - the required nickname to use.
    
    password - the optional password required to join
    
    Returns:
    
    A MultiUserChat.MucCreateConfigFormHandle if the room was created while joining, or null if the room was just joined.
    
    Throws:
    
    SmackException.NoResponseException - if there was no response from the remote entity.
    
    XMPPException.XMPPErrorException - if there was an XMPP error returned.
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    MultiUserChatException.NotAMucServiceException - if the entity is not a MUC serivce.
  - join
```
public void join(Resourcepart nickname)
          throws SmackException.NoResponseException,
                 XMPPException.XMPPErrorException,
                 SmackException.NotConnectedException,
                 InterruptedException,
                 MultiUserChatException.NotAMucServiceException
```
    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 - if there was no response from the remote entity.
    
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    MultiUserChatException.NotAMucServiceException - if the entity is not a MUC serivce.
  - join
```
public void join(Resourcepart nickname,
                 String password)
          throws XMPPException.XMPPErrorException,
                 InterruptedException,
                 SmackException.NoResponseException,
                 SmackException.NotConnectedException,
                 MultiUserChatException.NotAMucServiceException
```
    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.
    
    InterruptedException - if the calling thread was interrupted.
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    SmackException.NoResponseException - if there was no response from the server.
    
    MultiUserChatException.NotAMucServiceException - if the entity is not a MUC serivce.
  - join
```
public void join(MucEnterConfiguration mucEnterConfiguration)
          throws XMPPException.XMPPErrorException,
                 SmackException.NoResponseException,
                 SmackException.NotConnectedException,
                 InterruptedException,
                 MultiUserChatException.NotAMucServiceException
```
    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:
    
    mucEnterConfiguration - the configuration used to enter the MUC.
    
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    MultiUserChatException.NotAMucServiceException - if the entity is not a MUC serivce.
  - isJoined
```
public boolean isJoined()
```
    Returns true if currently in the multi user chat (after calling the join(Resourcepart) method).
    
    Returns:
    
    true if currently in the multi user chat room.
  - leaveSync
```
@Deprecated
public Presence leaveSync()
                   throws SmackException.NotConnectedException,
                          InterruptedException,
                          MultiUserChatException.MucNotJoinedException,
                          SmackException.NoResponseException,
                          XMPPException.XMPPErrorException
```
    Deprecated.
    use leave() instead.
    
    Leave the chat room.
    
    Returns:
    
    the leave presence as reflected by the MUC.
    
    Throws:
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    XMPPException.XMPPErrorException - if there was an XMPP error returned.
    
    SmackException.NoResponseException - if there was no response from the remote entity.
    
    MultiUserChatException.MucNotJoinedException - if not joined to the Multi-User Chat.
  - leave
```
public Presence leave()
               throws SmackException.NotConnectedException,
                      InterruptedException,
                      SmackException.NoResponseException,
                      XMPPException.XMPPErrorException,
                      MultiUserChatException.MucNotJoinedException
```
    Leave the chat room.
    
    Returns:
    
    the leave presence as reflected by the MUC.
    
    Throws:
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    XMPPException.XMPPErrorException - if there was an XMPP error returned.
    
    SmackException.NoResponseException - if there was no response from the remote entity.
    
    MultiUserChatException.MucNotJoinedException - if not joined to the Multi-User Chat.
  - getConfigFormManager
```
public MucConfigFormManager getConfigFormManager()
                                          throws SmackException.NoResponseException,
                                                 XMPPException.XMPPErrorException,
                                                 SmackException.NotConnectedException,
                                                 InterruptedException
```
    Get a MucConfigFormManager to configure this room.
    Only room owners are able to configure a room.
    
    Returns:
    
    a MUC configuration form manager for this room.
    
    Throws:
    
    SmackException.NoResponseException - if there was no response from the remote entity.
    
    XMPPException.XMPPErrorException - if there was an XMPP error returned.
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    Since:
    
    4.2
    
    See Also:
    
    XEP-45 § 10.2 Subsequent Room Configuration
  - getConfigurationForm
```
public Form getConfigurationForm()
                          throws SmackException.NoResponseException,
                                 XMPPException.XMPPErrorException,
                                 SmackException.NotConnectedException,
                                 InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - sendConfigurationForm
```
public void sendConfigurationForm(FillableForm form)
                           throws SmackException.NoResponseException,
                                  XMPPException.XMPPErrorException,
                                  SmackException.NotConnectedException,
                                  InterruptedException
```
    Sends the completed configuration form to the server. The room will be configured with the new settings defined in the form.
    
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - getRegistrationForm
```
public Form getRegistrationForm()
                         throws SmackException.NoResponseException,
                                XMPPException.XMPPErrorException,
                                SmackException.NotConnectedException,
                                InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - sendRegistrationForm
```
public void sendRegistrationForm(FillableForm form)
                          throws SmackException.NoResponseException,
                                 XMPPException.XMPPErrorException,
                                 SmackException.NotConnectedException,
                                 InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - destroy
```
public void destroy(String reason,
                    EntityBareJid alternateJID)
             throws SmackException.NoResponseException,
                    XMPPException.XMPPErrorException,
                    SmackException.NotConnectedException,
                    InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - invite
```
public void invite(EntityBareJid user,
                   String reason)
            throws SmackException.NotConnectedException,
                   InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - invite
```
@Deprecated
public void invite(Message message,
                   EntityBareJid user,
                   String reason)
            throws SmackException.NotConnectedException,
                   InterruptedException
```
    Deprecated.
    use invite(MessageBuilder, EntityBareJid, String) instead.
    
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - invite
```
public void invite(MessageBuilder messageBuilder,
                   EntityBareJid user,
                   String reason)
            throws SmackException.NotConnectedException,
                   InterruptedException
```
    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:
    
    messageBuilder - 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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - addInvitationRejectionListener
```
public boolean 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.
    
    Returns:
    
    true if the listener was not already added.
  - removeInvitationRejectionListener
```
public boolean 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.
    
    Returns:
    
    true if the listener was registered and is now removed.
  - addSubjectUpdatedListener
```
public boolean 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.
    
    Returns:
    
    true if the listener was not already added.
  - removeSubjectUpdatedListener
```
public boolean 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.
    
    Returns:
    
    true if the listener was registered and is now removed.
  - addPresenceInterceptor
```
public void addPresenceInterceptor(PresenceListener presenceInterceptor)
```
    Adds a new StanzaListener that will be invoked every time a new presence is going to be sent by this MultiUserChat to the server. Stanza interceptors may add new extensions to the presence that is going to be sent to the MUC service.
    
    Parameters:
    
    presenceInterceptor - the new stanza interceptor that will intercept presence packets.
  - removePresenceInterceptor
```
public void removePresenceInterceptor(PresenceListener presenceInterceptor)
```
    Removes a StanzaListener that was being invoked every time a new presence was being sent by this MultiUserChat to the server. Stanza interceptors may add new extensions to the presence that is going to be sent to the MUC service.
    
    Parameters:
    
    presenceInterceptor - the stanza 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,
                                  InterruptedException
```
    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.
    
    InterruptedException - if the calling thread was interrupted.
  - getNickname
```
public Resourcepart 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(Resourcepart nickname)
                    throws SmackException.NoResponseException,
                           XMPPException.XMPPErrorException,
                           SmackException.NotConnectedException,
                           InterruptedException,
                           MultiUserChatException.MucNotJoinedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    MultiUserChatException.MucNotJoinedException - if not joined to the Multi-User Chat.
  - changeAvailabilityStatus
```
public void changeAvailabilityStatus(String status,
                                     Presence.Mode mode)
                              throws SmackException.NotConnectedException,
                                     InterruptedException,
                                     MultiUserChatException.MucNotJoinedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    MultiUserChatException.MucNotJoinedException - if not joined to the Multi-User Chat.
  - kickParticipant
```
public void kickParticipant(Resourcepart nickname,
                            String reason)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException,
                            InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - requestVoice
```
public void requestVoice()
                  throws SmackException.NotConnectedException,
                         InterruptedException
```
    Sends a voice request to the MUC. The room moderators usually need to approve this request.
    
    Throws:
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
    
    Since:
    
    4.1
    
    See Also:
    
    XEP-45 § 7.13 Requesting Voice
  - grantVoice
```
public void grantVoice(Collection<Resourcepart> nicknames)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException,
                       InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantVoice
```
public void grantVoice(Resourcepart nickname)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException,
                       InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeVoice
```
public void revokeVoice(Collection<Resourcepart> nicknames)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException,
                        InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeVoice
```
public void revokeVoice(Resourcepart nickname)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException,
                        InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - banUsers
```
public void banUsers(Collection<? extends Jid> jids)
              throws XMPPException.XMPPErrorException,
                     SmackException.NoResponseException,
                     SmackException.NotConnectedException,
                     InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - banUser
```
public void banUser(Jid jid,
                    String reason)
             throws XMPPException.XMPPErrorException,
                    SmackException.NoResponseException,
                    SmackException.NotConnectedException,
                    InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantMembership
```
public void grantMembership(Collection<? extends Jid> jids)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException,
                            InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantMembership
```
public void grantMembership(Jid jid)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException,
                            InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeMembership
```
public void revokeMembership(Collection<? extends Jid> jids)
                      throws XMPPException.XMPPErrorException,
                             SmackException.NoResponseException,
                             SmackException.NotConnectedException,
                             InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeMembership
```
public void revokeMembership(Jid jid)
                      throws XMPPException.XMPPErrorException,
                             SmackException.NoResponseException,
                             SmackException.NotConnectedException,
                             InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantModerator
```
public void grantModerator(Collection<Resourcepart> nicknames)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException,
                           InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantModerator
```
public void grantModerator(Resourcepart nickname)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException,
                           InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeModerator
```
public void revokeModerator(Collection<Resourcepart> nicknames)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException,
                            InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeModerator
```
public void revokeModerator(Resourcepart nickname)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException,
                            InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantOwnership
```
public void grantOwnership(Collection<? extends Jid> jids)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException,
                           InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantOwnership
```
public void grantOwnership(Jid jid)
                    throws XMPPException.XMPPErrorException,
                           SmackException.NoResponseException,
                           SmackException.NotConnectedException,
                           InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeOwnership
```
public void revokeOwnership(Collection<? extends Jid> jids)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException,
                            InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeOwnership
```
public void revokeOwnership(Jid jid)
                     throws XMPPException.XMPPErrorException,
                            SmackException.NoResponseException,
                            SmackException.NotConnectedException,
                            InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantAdmin
```
public void grantAdmin(Collection<? extends Jid> jids)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException,
                       InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - grantAdmin
```
public void grantAdmin(Jid jid)
                throws XMPPException.XMPPErrorException,
                       SmackException.NoResponseException,
                       SmackException.NotConnectedException,
                       InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeAdmin
```
public void revokeAdmin(Collection<? extends Jid> jids)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException,
                        InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - revokeAdmin
```
public void revokeAdmin(EntityJid jid)
                 throws XMPPException.XMPPErrorException,
                        SmackException.NoResponseException,
                        SmackException.NotConnectedException,
                        InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - 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<EntityFullJid> getOccupants()
```
    Returns an List 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 XmppStringUtils.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(EntityFullJid 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(EntityFullJid 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 boolean addParticipantListener(PresenceListener listener)
```
    Adds a stanza 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 stanza listener that will be notified of any presence packets sent to the group chat.
    
    Returns:
    
    true if the listener was not already added.
  - removeParticipantListener
```
public boolean removeParticipantListener(PresenceListener listener)
```
    Removes a stanza listener that was being notified of any new Presence packets sent to the group chat.
    
    Parameters:
    
    listener - a stanza listener that was being notified of any presence packets sent to the group chat.
    
    Returns:
    
    true if the listener was removed, otherwise the listener was not added previously.
  - getOwners
```
public List<Affiliate> getOwners()
                          throws SmackException.NoResponseException,
                                 XMPPException.XMPPErrorException,
                                 SmackException.NotConnectedException,
                                 InterruptedException
```
    Returns a list of Affiliate with the room owners.
    
    Returns:
    
    a list 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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - getAdmins
```
public List<Affiliate> getAdmins()
                          throws SmackException.NoResponseException,
                                 XMPPException.XMPPErrorException,
                                 SmackException.NotConnectedException,
                                 InterruptedException
```
    Returns a list of Affiliate with the room administrators.
    
    Returns:
    
    a list 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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - getMembers
```
public List<Affiliate> getMembers()
                           throws SmackException.NoResponseException,
                                  XMPPException.XMPPErrorException,
                                  SmackException.NotConnectedException,
                                  InterruptedException
```
    Returns a list of Affiliate with the room members.
    
    Returns:
    
    a list 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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - getOutcasts
```
public List<Affiliate> getOutcasts()
                            throws SmackException.NoResponseException,
                                   XMPPException.XMPPErrorException,
                                   SmackException.NotConnectedException,
                                   InterruptedException
```
    Returns a list of Affiliate with the room outcasts.
    
    Returns:
    
    a list 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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - getModerators
```
public List<Occupant> getModerators()
                             throws SmackException.NoResponseException,
                                    XMPPException.XMPPErrorException,
                                    SmackException.NotConnectedException,
                                    InterruptedException
```
    Returns a list of Occupant with the room moderators.
    
    Returns:
    
    a list 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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - getParticipants
```
public List<Occupant> getParticipants()
                               throws SmackException.NoResponseException,
                                      XMPPException.XMPPErrorException,
                                      SmackException.NotConnectedException,
                                      InterruptedException
```
    Returns a list of Occupant with the room participants.
    
    Returns:
    
    a list 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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - sendMessage
```
public void sendMessage(String text)
                 throws SmackException.NotConnectedException,
                        InterruptedException
```
    Sends a message to the chat room.
    
    Parameters:
    
    text - the text of the message to send.
    
    Throws:
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - createPrivateChat
```
public Chat createPrivateChat(EntityFullJid occupant,
                              ChatMessageListener 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
```
@Deprecated
public Message createMessage()
```
    Deprecated.
    use buildMessage() instead.
    
    Creates a new Message to send to the chat room.
    
    Returns:
    
    a new Message addressed to the chat room.
  - buildMessage
```
public MessageBuilder buildMessage()
```
    Constructs a new message builder for messages send to this MUC room.
    
    Returns:
    
    a new message builder.
  - sendMessage
```
@Deprecated
public void sendMessage(Message message)
                 throws SmackException.NotConnectedException,
                        InterruptedException
```
    Deprecated.
    use sendMessage(MessageBuilder) instead.
    
    Sends a Message to the chat room.
    
    Parameters:
    
    message - the message.
    
    Throws:
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - sendMessage
```
public void sendMessage(MessageBuilder messageBuilder)
                 throws SmackException.NotConnectedException,
                        InterruptedException
```
    Sends a Message to the chat room.
    
    Parameters:
    
    messageBuilder - the message.
    
    Throws:
    
    SmackException.NotConnectedException - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - pollMessage
```
public Message pollMessage()
                    throws MultiUserChatException.MucNotJoinedException
```
    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.
    
    Throws:
    
    MultiUserChatException.MucNotJoinedException - if not joined to the Multi-User Chat.
  - nextMessage
```
public Message nextMessage()
                    throws MultiUserChatException.MucNotJoinedException,
                           InterruptedException
```
    Returns the next available message in the chat. The method call will block (not return) until a message is available.
    
    Returns:
    
    the next message.
    
    Throws:
    
    MultiUserChatException.MucNotJoinedException - if not joined to the Multi-User Chat.
    
    InterruptedException - if the calling thread was interrupted.
  - nextMessage
```
public Message nextMessage(long timeout)
                    throws MultiUserChatException.MucNotJoinedException,
                           InterruptedException
```
    Returns the next available message in the chat. The method call will block (not return) until a stanza 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.
    
    Throws:
    
    MultiUserChatException.MucNotJoinedException - if not joined to the Multi-User Chat.
    
    InterruptedException - if the calling thread was interrupted.
  - addMessageListener
```
public boolean addMessageListener(MessageListener listener)
```
    Adds a stanza 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 stanza listener.
    
    Returns:
    
    true if the listener was not already added.
  - removeMessageListener
```
public boolean removeMessageListener(MessageListener listener)
```
    Removes a stanza 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 stanza listener.
    
    Returns:
    
    true if the listener was removed, otherwise the listener was not added previously.
  - changeSubject
```
public void changeSubject(String subject)
                   throws SmackException.NoResponseException,
                          XMPPException.XMPPErrorException,
                          SmackException.NotConnectedException,
                          InterruptedException
```
    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 - if the XMPP connection is not connected.
    
    InterruptedException - if the calling thread was interrupted.
  - addUserStatusListener
```
public boolean 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.
    
    Returns:
    
    true if the user status listener was not already added.
  - removeUserStatusListener
```
public boolean 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.
    
    Returns:
    
    true if the listener was registered and is now removed.
  - addParticipantStatusListener
```
public boolean 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.
    
    Returns:
    
    true if the listener was not already added.
  - removeParticipantStatusListener
```
public boolean 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.
    
    Returns:
    
    true if the listener was registered and is now removed.
  - getXmppConnection
```
public XMPPConnection getXmppConnection()
```
    Get the XMPP connection associated with this chat instance.
    
    Returns:
    
    the associated XMPP connection.
    
    Since:
    
    4.3.0
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class MultiUserChat

Nested Class Summary

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getRoom

getEnterConfigurationBuilder

create

createOrJoin

createOrJoin

createOrJoinIfNecessary

join

join

join

isJoined

leaveSync

leave

getConfigFormManager

getConfigurationForm

sendConfigurationForm

getRegistrationForm

sendRegistrationForm

destroy

invite

invite

invite

addInvitationRejectionListener

removeInvitationRejectionListener

addSubjectUpdatedListener

removeSubjectUpdatedListener

addPresenceInterceptor

removePresenceInterceptor

getSubject

getReservedNickname

getNickname

changeNickname

changeAvailabilityStatus

kickParticipant

requestVoice

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

buildMessage

sendMessage

sendMessage

pollMessage