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The Gang of Four Design Patterns Simplified: All the 23 design patterns explained in simple language with use cases and java code.
The Gang of Four Design Patterns are often hard to get .
This book provides an easier explanation of all the 23 design patterns with use cases implemented in Java and with link to GitHub.
Topics
Creational :Deals with how to create objects.
Singleton – Create a single instance of an object.
Prototype– Use an existing object by cloning it.
Factory Method – Delegate creation of an object to another object.
Abstract Factory – Delegate creation of a group of related objects to another object.
Builder – Delegate creation of a complex object to another object.
with how to structure objects.
Adapter – Make two incompatible interfaces work together.
Bridge – Separate abstraction and implementation.
Composite – Treat part-whole hierarchy the same way.
Decorator – Add responsibilities to an object dynamically.
Facade – Provide a single interface for a group of related operations.
Flyweight – Reuse objects than creating new ones.
Proxy – Protect access to an object.
BehavioralDeals with how to communicate between objects.
Chain of Responsibility – Allow different objects to carry out a responsibility.
Command – Encapsulate requests as separate objects.
Mediator – Act as a broker for communication between objects.
Template – Provide basic template of an algorithm to implement.
Strategy – Encapsulate different algorithms using separate objects which can be chosen at run time.
State – Encapsulate state specific behavior in a separate object.
Observer – Intimate group of objects when a change occurs.
Memento – Allow to revert an object’s state.
Iterator – Provide a generic way to iterate through collection of objects.
Interpreter – Represent a grammar using an object.
Visitor – Add new responsibilities to an object without changing its existing behavior.
Note : The original book by the Gang of Four was referred for these posts.
This book provides an easier explanation of all the 23 design patterns with use cases implemented in Java and with link to GitHub.
Topics
Creational :Deals with how to create objects.
Singleton – Create a single instance of an object.
Prototype– Use an existing object by cloning it.
Factory Method – Delegate creation of an object to another object.
Abstract Factory – Delegate creation of a group of related objects to another object.
Builder – Delegate creation of a complex object to another object.
with how to structure objects.
Adapter – Make two incompatible interfaces work together.
Bridge – Separate abstraction and implementation.
Composite – Treat part-whole hierarchy the same way.
Decorator – Add responsibilities to an object dynamically.
Facade – Provide a single interface for a group of related operations.
Flyweight – Reuse objects than creating new ones.
Proxy – Protect access to an object.
BehavioralDeals with how to communicate between objects.
Chain of Responsibility – Allow different objects to carry out a responsibility.
Command – Encapsulate requests as separate objects.
Mediator – Act as a broker for communication between objects.
Template – Provide basic template of an algorithm to implement.
Strategy – Encapsulate different algorithms using separate objects which can be chosen at run time.
State – Encapsulate state specific behavior in a separate object.
Observer – Intimate group of objects when a change occurs.
Memento – Allow to revert an object’s state.
Iterator – Provide a generic way to iterate through collection of objects.
Interpreter – Represent a grammar using an object.
Visitor – Add new responsibilities to an object without changing its existing behavior.
Note : The original book by the Gang of Four was referred for these posts.
290 pages, Kindle Edition
Published October 27, 2021
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April 26, 2022
A java implementation of the 23 design patterns mentioned in the classic text by Gang of Four.
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