Behavioral Patterns

In software engineering, behavioral design patterns are design patterns that identify common communication patterns between objects and realize these patterns. By doing so, these patterns increase flexibility in carrying out this communication.

Behavioral patterns are concerned with the assignment of responsibilities between objects, or, encapsulating behavior in an object and delegating requests to it.

Unlike the Creational and Structural patterns, which deal with the instantiation process and the blueprint of objects and classes, the central idea here is to concentrate on the way objects are interconnected. In a word, we can say this: If Creational is about instantiation, and Structural is the blueprint, then Behavioral is the pattern of the relationship among objects.

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