Facade Design Pattern is nothing but it simply interface of interfaces to simplify interactions between the client code and subsystem classes. This design comes under the GOF Structural Design Pattern. Facade provides clients with access to the system but conceals the working of the system and its complexities. The pattern creates one class consisting of user functions and delegates provide calling facilities to the classes belonging to the systems. Facade Design Pattern According to the Gang of Four: Provide a unified interface to a set of interfaces in a subsystem. Façade defines a higher-level interface that makes the subsystem easier

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Facade Design Pattern – Structural Patterns in Java

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