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An interface could contain a set of objects and provide simpler, higher-level functions to the programmer (for example, the facade pattern); it could provide a cleaner or more specific way of using complicated classes (a " wrapper" class); it could be used to act as " glue" between two different API's (the adapter pattern); and much more.

Other kinds of interface patterns are: delegation patternThe delegation pattern is a technique where an object outwardly expresses certain behaviour but in reality delegates responsibility for implementing that behavior to an associated object in an Inversion of Responsibility''. This simulates mixins, delegati, composite patternIn computer programming, composite pattern is one of the design patterns to decompose objects into their parts, and reassemble them in whichever combination one needs with " has-a" relationships. That is to say, to break things into the largest parts that, and bridge patternThe bridge pattern is a design pattern used in software engineering. The bridge design pattern is meant to decouple an abstraction from its implementation so that the two can vary independently (Gamma et. The bridge uses encapsulation, aggregation, and ca.