Client and backend. This class is shared: the same code is compiled into your app and into your server, so everything on this page works in both.

public interface Observer

Observer is the interface to be implemented by objects that receive notification of updates on an Observable object.

See also

Methods

public abstract void update(Observable observable, Object data)This method is called if the specified Observable object’s notifyObservers method is called (because the Observable object has been updated.

Method details

update

public abstract void update(Observable observable, Object data)
This method is called if the specified Observable object’s notifyObservers method is called (because the Observable object has been updated.

Parameters

observable Observable
the Observable object.
data Object
the data passed to Observable#notifyObservers(Object).