How are Observer and Observable used in java? Sumit Kesarwani152328-Sep-2014javajava Updated on 20-Sep-2020
Sumit Kesarwani
28-Sep-2014Objects that subclass the Observable class maintain a list of observers.
When an Observable object is updated it invokes the update() method of each of its observers to notify the observers that it has changed state.
The Observer interface is implemented by objects that observe Observable objects.