Behavioral Patterns

Behavioral patterns help to solve interaction or communication of objects.

Template method

• Defer the exact steps of an algorithm to a subclass

Mediator

• Defines simplified communication between classes

Chain of responsibility

• A way of passing a request between a chain of objects

Observer

• A way of notifying change to a number of classes

Strategy

• Encapsulates an algorithm inside a class

Command

• Encapsulate a command request as an object

State

• Alter an object's behavior when its state changes

Visitor

• Defines a new operation to a class without change

Memento

• Capture and restore an object's internal state

Interpreter

• A way to include language elements in a program

Null Object

• Designed to act as a default value of an object

Iterator

• Sequentially access the elements of a collection