The core of object-oriented programming is the way it gets us thinking in terms of behavior and collaboration instead of algorithms and data. Interfaces are the gateway for this mindset. A good interface communicates intentions and becomes a joining point between different parts of our architecture.KeywordsOriginal MethodFactory MethodDiscount PriceMethod ProblemPublic FunctionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.