Explain difference between the Facade, Proxy, Adapter and Decorator design patterns?

  • The Facade design pattern provides a simplified interface to a complex system, while the Proxy design pattern provides a placeholder for another object to control access to it. The Adapter design pattern converts the interface of a class into another interface that the client expects, and the Decorator design pattern adds behavior to an individual object, dynamically, without affecting the behavior of other objects from the same class.
  • The Facade design pattern provides a unified interface to a set of interfaces in a system, while the Proxy design pattern provides a way to access an object indirectly. The Adapter design pattern adapts an object to a new interface, and the Decorator design pattern adds behavior to an individual object, dynamically, but affects the behavior of other objects from the same class.
  • The Facade design pattern provides a way to access a system's functionality, while the Proxy design pattern provides a way to extend an object's functionality. The Adapter design pattern converts the interface of one class into that of another, and the Decorator design pattern adds behavior to an individual object, statically, and affects the behavior of other objects from the same class.
  • The Facade design pattern provides an intermediary between two systems, while the Proxy design pattern provides a default implementation of an interface. The Adapter design pattern is used to allow two systems to work together, and the Decorator design pattern adds behavior to an object, statically, without affecting the behavior of other objects from the same class.
The Facade design pattern provides a simplified interface to a complex system, while the Proxy design pattern provides a placeholder for another object to control access to it. The Adapter design pattern converts the interface of a class into another interface that the client expects, and the Decorator design pattern adds behavior to an individual object, dynamically, without affecting the behavior of other objects from the same class.
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