| Creational | Based on the concept of creating an object |
|---|---|
| Class | |
| Factory Method | Makes an instance of several derived classes based on interfaced data or events |
| Object | |
| Abstract factory | Creates an instance of several families of classes without detailing concrete classes |
| Builder | Separates object construction from its representation; always creates the same type of object |
| Prototype | A fully initialized instance used for copying or cloning |
| Singleton | A class with only a single instance with global access points |
| Structural | Based on the idea of building blocks of objects |
|---|---|
| Class | |
| Adapter | Matches interfaces of different classes so classes can work together despite incompatible interfaces |
| Object | |
| Adapter | Matches interfaces of different classes so classes can work together despite incompatible interfaces |
| Bridge | Separates an object's interface from its implementation so the two can vary independently |
| Composite | A structure of simple and composite objects that makes the total object more than just the sum of its parts |
| Decorator | Dynamically adds alternate processing to objects |
| Facade | A single class that hides the complexity of an entire subsystem |
| Flyweight | A fine-grained instance used for efficient sharing of information that is contained elsewhere |
| Proxy | A placeholder object representing the true object |
| Behavioral | Based on the way objects play and work together |
|---|---|
| Class | |
| Interpreter | A way to include language elements in an application to match the grammar of the intended language |
| Template method | Creates the shell of an algorithm in a method, then defers the exact steps to a subclass |
| Object | |
| Chain of responsibility | A way of passing a request between a chain of objects to find the object that can handle the request |
| Command | A way to separate the execution of a command from its invoker |
| Iterator | Sequentially accesses the elements of a collection without knowing the inner workings of the collection |
| Mediator | Defines simplified communication between classes to prevent a group of classes from referring explicity to each other |
| Memento | Captures an object's internal state to be able to restore it later |
| Observer | A way of notifying change to a number of classes to ensure consistency between the classes |
| State | Alters an object's behavior when its state changes |
| Strategy | Encapsulates an algorithm inside a class separating the selection from the implementation |
| Visitor | Adds a new operation to a class without changing the class |