Structural design patterns

Structural design patterns are concerned with how classes and objects can be composed, to form larger structures.The structural design patterns simplifies the structure by identifying the relationships.These patterns focus on, how the classes inherit from each other and how they are composed from other classes.

• Adapter Pattern 
• An Adapter Pattern says that just "converts the interface of a class into another interface that a client wants".
• In other words, to provide the interface according to client requirement while using the services of a class with a different interface.
• The Adapter Pattern is also known as Wrapper.