HOW ARE OBSERVER AND OBSERVABLE USED IN JAVA?

Sumit Kesarwani

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Posted by  Sumit Kesarwani
Java 
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  1. Sumit Kesarwani

    Post:782

    Points:3910
    How are Observer and Observable used in java?

    Objects 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.

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