How can we use observer and observable, JAVA Programming

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How can we use Observer and Observable ?

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12/2/2013 11:47:56 PM Objects which subclass the Observable class maintains a list of the observers. Whenever an Observable object is updated it invokes the update() method of each of its observers to report the observers that the state has been changed . The Observer interface is implemented by objects which observe Observable objects.

12/2/2013 11:47:56 PM

Objects which subclass the Observable class maintains a list of the observers. Whenever an Observable object is updated it invokes the update() method of each of its observers to report the observers that the state has been changed . The Observer interface is implemented by objects which observe Observable objects.

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