Objects that subclass the Observable class maintain a list of observers. When anObservable object is updated it invokes the update() method of each of its observers tonotify the observers that it has changed
Latest Answer : Observer observe only those class which are Observable. ...
Latest Answer : Observer is an object that wishes to be notified when the state of other object changes.(Listener,registered with the source to be notified of any change in the source) Observable is an object whose state may be of interest and in which other ...
Objects that subclass the Observable class maintain a list of observers. When anObservable object isupdated it invokes the update() method of each of its observers to notify the observersthat it has changedstate.
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