Fire user change event

I would like to fire a user changeEvent in an application .
Does anyone know how to do that?

Example
:
daten.setValue(“anything”);
– and then next fire a user change event!?

Thanks and best regards

A little more context would be helpful. What is a ‘user’ changeEvent? Are you talking of the GWT ChangeEvent class? What is ‘daten’ in your example? What is it that you’re functionally trying to accomplish?

Regards.

Thanks for your quick reply

We habe a Login Window with Uster Name and Password and a Data Room.
These values ​​are stored in a serializable class.
If the user wants to change the room , he has to sign up again and again .
It would be good if he could do that in the application.

The Login calls on:

public void applicationUserChanged(UserChangeEvent event) {
}

the function is called so:

public void setUser(Object user) {
final Object prevUser = this.user;
if (user == prevUser || (user != null && user.equals(prevUser))) {
return;
}
this.user = user;
if (userChangeListeners != null) {
final Object listeners = userChangeListeners.toArray();
final UserChangeEvent event = new UserChangeEvent(this, user,
prevUser);
for (int i = 0; i < listeners.length; i++) {
((UserChangeListener) listeners[i]
)
.applicationUserChanged(event);
}
}
}

I would now like to keep all the information user object , and only change a value , and call the function anywhere in the program .

I hope this is understandable?

Thanks and Regards