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This Repo Contains List of All Design Patterns that I Have Learned During My Course of Design Patterns (DP). So, This Repo is Enriched with Creational, Structural and Behavioral Patterns.

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Design Patterns in Java

This repository contains code and UML structure diagrams for various design patterns implemented in Java.

Creational Patterns

Creational patterns focus on the process of object creation.

Singleton Pattern

Intent: Ensure a class has only one instance, and provide a global point of access to it.

Factory Method Pattern

Intent: Define an interface for creating objects, but let subclasses decide which classes to instantiate. Factory Method lets a class defer instantiation to subclasses.

Abstract Factory Pattern

Intent: Provide an interface for creating families of related or dependent objects without specifying their concrete classes.

Builder Pattern

Intent: Separate the construction of a complex object from its representation, allowing the same construction process to create various representations.

Prototype Pattern

Intent: Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype.

Structural Patterns

Structural patterns focus on the composition of classes and objects.

Adapter Pattern

Intent: Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces.

Bridge Pattern

Intent: Decouple an abstraction from its implementation so that the two can vary independently.

Composite Pattern

Intent: Compose objects into tree structures to represent part-whole hierarchies. Composite lets clients treat individual objects and compositions of objects uniformly.

Decorator Pattern

Intent: Attach additional responsibilities to an object dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.

Facade Pattern

Intent: Provide a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use.

Flyweight Pattern

Intent: Use sharing to support large numbers of fine-grained objects efficiently.

Proxy Pattern

Intent: Provide a surrogate or placeholder for another object to control access to it.

Behavioral Patterns

Behavioral patterns focus on communication between objects and how they operate together.

Chain of Responsibility Pattern

Intent: Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it.

Command Pattern

Intent: Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations.

Interpreter Pattern

Intent: Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language.

Iterator Pattern

Intent: Provide a way to access the elements of an aggregate object sequentially without exposing its underlying representation.

Observer Pattern

Intent: Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.

State Pattern

Intent: Allow an object to alter its behavior when its internal state changes. The object will appear to change its class.

Strategy Pattern

Intent: Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.

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This Repo Contains List of All Design Patterns that I Have Learned During My Course of Design Patterns (DP). So, This Repo is Enriched with Creational, Structural and Behavioral Patterns.

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