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Java has built-in Observer pattern in the java.util package. The Interface

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In Java the observer pattern is used extensively in the Java Foundation Classes (

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This Java tutorial describes the observer pattern, a behavioral object pattern.www.avajava.com/tutorials/lessons/observer-pattern.html - CachedObserver Design Pattern « Java Programming Resources « Source . Observer design pattern (also known as Dependants and Publish-subscribe) is a

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