https://github.com/alexprut/design-patterns-java
📗 Classic OOP Design Patterns from GoF, implemented in Java.
https://github.com/alexprut/design-patterns-java
design-patterns gof java oop
Last synced: about 2 months ago
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📗 Classic OOP Design Patterns from GoF, implemented in Java.
- Host: GitHub
- URL: https://github.com/alexprut/design-patterns-java
- Owner: alexprut
- License: mit
- Created: 2015-04-28T13:25:42.000Z (about 10 years ago)
- Default Branch: master
- Last Pushed: 2024-03-13T14:44:33.000Z (over 1 year ago)
- Last Synced: 2025-04-06T05:51:11.453Z (3 months ago)
- Topics: design-patterns, gof, java, oop
- Language: Java
- Homepage:
- Size: 1.01 MB
- Stars: 33
- Watchers: 3
- Forks: 24
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
Design Patterns in Java
[](https://github.com/google/google-java-format)
[](https://github.com/alexprut/design-patterns-java/blob/master/LICENSE)
Classic OOP Design Patterns from GoF, implemented in Java.
Design Patterns Implemented
---------------------------
#### Structural
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-class-adapter.png) –
[Class Adapter](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/class_adapter)
— _allows classes with incompatible interfaces to work together by wrapping its own interface around that of an already existing class_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-object-adapter.png) –
[Object Adapter](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/object_adapter)
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-facade.png) –
[Facade](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/facade)
— _provides a simplified interface to a large body of code_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-composite.png) –
[Composite](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/composite)
— _composes zero-or-more similar objects so that they can be manipulated as one object_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-decorator.png) –
[Decorator](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/decorator)
— _dynamically adds/overrides behaviour in an existing method of an object_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-proxy.png) –
[Proxy](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/proxy)
— _provides a placeholder for another object to control access, reduce cost, and reduce complexity_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-flyweight.png) –
[Flyweight](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/flyweight)
— _reduces the cost of creating and manipulating a large number of similar objects_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-bridge.png) –
[Bridge](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/structural/bridge)
— _decouples an abstraction from its implementation so that the two can vary independently_
#### Creational
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-factory-method.png) –
[Factory Method](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/creational/factory_method)
— _creates objects without specifying the exact class to create_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-abstract-factory.png) –
[Abstract Factory](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/creational/abstract_factory)
— _groups object factories that have a common theme_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-prototype.png) –
[Prototype](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/creational/prototype)
— _creates objects by cloning an existing object_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-singleton.png) –
[Singleton](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/creational/singleton)
— _restricts object creation for a class to only one instance_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-builder.png) –
[Builder](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/creational/builder)
— _constructs complex objects by separating construction and representation_
#### Behavioral
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-template-method.png) –
[Template Method](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/template_method)
— _defines the skeleton of an algorithm as an abstract class, allowing its subclasses to provide concrete behavior_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-strategy.png) –
[Strategy](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/strategy)
— _allows one of a family of algorithms to be selected on-the-fly at runtime_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-state.png) –
[State](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/state)
— _allows an object to alter its behavior when its internal state changes_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-command.png) –
[Command](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/command)
— _creates objects which encapsulate actions and parameters_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-observer.png) –
[Observer](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/observer)
— _is a publish/subscribe pattern which allows a number of observer objects to see an event_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-mediator.png) –
[Mediator](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/mediator)
— _allows loose coupling between classes by being the only class that has detailed knowledge of their methods_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-memento.png) –
[Memento](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/memento)
— _provides the ability to restore an object to its previous state (undo)_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-iterator.png) –
[Iterator](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/iterator)
— _accesses the elements of an object sequentially without exposing its underlying representation_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-visitor.png) –
[Visitor](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/visitor)
— _separates an algorithm from an object structure by moving the hierarchy of methods into one object_
* [UML](https://github.com/alexprut/design-patterns-java/tree/master/src/main/resources/img/uml-chain-of-responsability.png) –
[Chain of Responsability](https://github.com/alexprut/design-patterns-java/tree/master/src/main/java/design_patterns/behavioral/chain_of_responsibility)
— _delegates commands to a chain of processing objects_
### Build
```
./gradlew clean build
```
### Test
```
./gradlew test
```
License
=======
Licensed under [MIT](https://github.com/alexprut/design-patterns-java/blob/master/LICENSE).