Design patterns are reusable solutions to common problems that occur in software development. They represent best practices evolved over time by experienced developers. Utilizing design patterns helps create systems that are more robust, flexible, and easy to maintain.
This repository contains examples of the following design patterns in Java: Strategy, Builder, Adapter, Singleton, Prototype, Proxy, Factory Method, Chain of Responsibility, and Template Method.
The Strategy Pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable. The strategy pattern lets the algorithm vary independently from clients that use it.
The Builder Pattern is used to construct complex objects step by step. It allows you to produce different types and representations of an object using the same construction code.
The Adapter Pattern allows objects with incompatible interfaces to work together. It acts as a bridge between two incompatible interfaces, enabling them to communicate and function together.
The Singleton Pattern ensures that a class has only one instance and provides a global point of access to that instance. It is useful when exactly one object is needed to coordinate actions across the system.
The Prototype Pattern is used to create a duplicate object or clone of the current object to reduce the cost of creating new instances. It allows for the creation of new objects by copying an existing object, known as the prototype.
The Proxy Pattern provides a surrogate or placeholder for another object to control access to it. It can add additional functionality, like lazy initialization, access control, logging, etc.
The Factory Method Pattern defines an interface for creating an object but allows subclasses to alter the type of objects that will be created. It lets a class defer instantiation to subclasses.
The Chain of Responsibility Pattern creates a chain of handler objects, where each handler decides either to process the request or to pass it to the next handler in the chain. It decouples the sender of a request from its receiver.
The Template Method Pattern defines the skeleton of an algorithm in the superclass but lets subclasses override specific steps of the algorithm without changing its structure. It allows subclasses to redefine certain steps of an algorithm without changing the algorithm's structure.
For detailed examples and implementation, please refer to the code files in this repository.