Interface pattern

The "interface pattern" isn't a specific pattern. It's a general method for structuring programs so that they're simpler to understand. In general, an "interface" is a class which provides simpler or more program-specific functionality to another class or group of classes.

An interface could contain a bunch of objects and provide simpler, higher-level functions to 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 more!

Other kinds of interface patterns are: delegation pattern, composite pattern, and bridge pattern.