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Observer Design Pattern
Design patterns are reusable solution for a commonly occurring problem. Using design patterns we can increase pace of development and reduce design issues. Observer design pattern is a behavioral design pattern which helps us to decouple one-to-many relationship
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Java List Vs Set – Tip
List collections are preferred for storing and retrieving unique/non-unique list of items in an order. It is not preferred for searching in large datasets. Set collections are preferred for storing and retrieving unique list of items, if order is