public Form getRegistrationForm() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
        Registration reg = new Registration();
        reg.setType(IQ.Type.get);
        reg.setTo(room);

        IQ result = connection.createStanzaCollectorAndSend(reg).nextResultOrThrow();
        return Form.getFormFrom(result);
    }
public Form getRegistrationForm ( ) throws NoResponseException , XMPPErrorException , NotConnectedException , InterruptedException { Registration reg = new Registration ( ) ; reg . setType ( IQ . Type . get ) ; reg . setTo ( room ) ; IQ result = connection . createStanzaCollectorAndSend ( reg ) . nextResultOrThrow ( ) ; return Form . getFormFrom ( result ) ; }
Returns the room's registration form that an unaffiliated user, can use to become a member
of the room or <tt>null</tt> if no registration is possible. Some rooms may restrict the
privilege to register members and allow only room admins to add new members.<p>

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).

@return the registration Form that contains the fields to complete together with the
instrucions or <tt>null</tt> if no registration is possible.
@throws 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.
@throws NoResponseException if there was no response from the server.
@throws NotConnectedException
@throws InterruptedException