Java Design Patterns

Explore Java Design Patterns articles in System Design.

System Design

Singleton Design Pattern in Java

Learn Singleton Design Pattern in Java with purpose, real-time examples, framework examples, diagrams, code, input/output, benefits, limitations, and interview questions.

JavaDesign PatternsSingletonCreational PatternSpring Boot

System Design

Factory Method Design Pattern in Java

Learn Factory Method Design Pattern in Java with purpose, diagrams, code examples, input/output, real-time examples, framework usage, benefits, limitations, and interview questions.

JavaDesign PatternsFactory MethodCreational PatternSpring Boot

System Design

Abstract Factory Design Pattern in Java

Learn Abstract Factory Design Pattern in Java with diagrams, real-world examples, framework usage, code examples, benefits, limitations, and interview questions.

JavaDesign PatternsAbstract FactoryCreational PatternSpring Boot

System Design

Builder Design Pattern in Java

Learn Builder Design Pattern in Java with diagrams, real-world examples, fluent APIs, Lombok @Builder, Spring Boot examples, input/output, benefits, limitations, and interview questions.

JavaDesign PatternsBuilderCreational PatternsLombok

System Design

Prototype Design Pattern in Java

Learn Prototype Design Pattern in Java with cloning, shallow copy, deep copy, diagrams, real-world examples, framework usage, code examples, benefits, limitations, and interview questions.

JavaDesign PatternsPrototypeCreational PatternCloneable

System Design

Adapter Design Pattern in Java

Learn Adapter Design Pattern in Java with real-world examples, legacy system integration, third-party APIs, Spring examples, UML diagrams, code examples, benefits, limitations, and interview questions.

JavaDesign PatternsAdapterStructural PatternSpring Boot

System Design

Bridge Design Pattern in Java

Learn Bridge Design Pattern in Java with diagrams, real-world examples, cloud integrations, notification systems, Spring Boot examples, benefits, limitations, and interview questions.

JavaDesign PatternsBridgeStructural PatternSpring Boot

System Design

Composite Design Pattern in Java

Learn Composite Design Pattern in Java with tree structures, file system examples, organization hierarchy, Spring examples, UML diagrams, code examples, benefits, limitations, and interview questions.

JavaDesign PatternsCompositeStructural PatternTree Structure

System Design

Decorator Design Pattern in Java

Learn Decorator Design Pattern in Java with real-world examples, Spring Security, Java IO, banking use cases, UML diagrams, code examples, benefits, limitations, and interview questions.

JavaDesign PatternsDecoratorStructural PatternSpring Boot

System Design

Facade Design Pattern in Java

Learn Facade Design Pattern in Java with real-world examples, UML diagrams, banking examples, Spring Boot use cases, microservices aggregation, benefits, limitations, and interview questions.

JavaDesign PatternsFacadeStructural PatternSpring BootMicroservices

System Design

Flyweight Design Pattern in Java

Learn Flyweight Design Pattern in Java with real-world examples, memory optimization techniques, intrinsic and extrinsic state, UML diagrams, Java implementation, JVM examples, enterprise use cases, and interview questions.

JavaDesign PatternsFlyweightStructural PatternMemory OptimizationPerformance

System Design

Java Design Patterns Learning Path

A complete ordered Java design patterns learning path grouped by creational, structural, and behavioral patterns with direct links to each pattern tutorial.

JavaDesign PatternsCreational PatternsStructural PatternsBehavioral Patterns

System Design

Proxy Design Pattern in Java

Learn Proxy Design Pattern in Java with Virtual Proxy, Protection Proxy, Remote Proxy, Smart Proxy, Spring AOP examples, caching, security, lazy loading, real-world use cases, and interview questions.

JavaDesign PatternsProxyStructural PatternSpring BootAOP

System Design

Chain of Responsibility Design Pattern in Java

Learn Chain of Responsibility Design Pattern in Java with request processing pipelines, validation chains, approval workflows, Spring Security filter chain, diagrams, code examples, benefits, limitations, and interview questions.

JavaDesign PatternsChain of ResponsibilityBehavioral PatternSpring BootSpring Security

System Design

Command Design Pattern in Java

Learn Command Design Pattern in Java with undo/redo operations, task queues, workflow automation, Spring examples, microservices use cases, UML diagrams, code examples, and interview questions.

JavaDesign PatternsCommand PatternBehavioral PatternSpring BootMicroservices

System Design

Interpreter Design Pattern in Java

Learn Interpreter Design Pattern in Java with expression trees, business rule engines, DSLs, Spring Expression Language (SpEL), real-world examples, UML diagrams, and interview questions.

JavaDesign PatternsInterpreterBehavioral PatternDSLRule Engine

System Design

Iterator Design Pattern in Java

Learn Iterator Design Pattern in Java with Collection traversal, Java Iterator API, custom iterators, internal vs external iteration, enterprise examples, UML diagrams, and interview questions.

JavaDesign PatternsIterator

System Design

Mediator Design Pattern in Java

Learn Mediator Design Pattern in Java with chat room examples, air traffic control systems, Spring events, enterprise workflow communication, UML diagrams, code examples, and interview questions.

JavaDesign PatternsMediatorBehavioral PatternSpring BootEvent Driven

System Design

Memento Design Pattern in Java

Learn Memento Design Pattern in Java with Undo functionality, state snapshots, text editor examples, transaction rollback concepts, UML diagrams, Java implementation, enterprise use cases, and interview questions.

JavaDesign PatternsMementoBehavioral PatternUndoSnapshot

System Design

Observer Design Pattern in Java

Learn Observer Design Pattern in Java with Publisher-Subscriber architecture, event-driven systems, Spring Events, Kafka messaging, real-time notifications, UML diagrams, Java implementation, enterprise use cases, and interview questions.

JavaDesign PatternsObserverBehavioral PatternEvent DrivenKafkaSpring Events

System Design

State Design Pattern in Java

Learn State Design Pattern in Java with workflow state transitions, order lifecycle management, loan processing workflows, Spring State Machine, UML diagrams, code examples, enterprise use cases, and interview questions.

JavaDesign PatternsState PatternBehavioral PatternWorkflowSpring State Machine

System Design

Strategy Design Pattern in Java

Learn Strategy Design Pattern in Java with runtime algorithm selection, payment processing, discount calculation, Spring Security strategies, UML diagrams, Java implementation, enterprise use cases, and interview questions.

JavaDesign PatternsStrategy PatternBehavioral PatternSpring BootEnterprise Architecture

System Design

Template Method Design Pattern in Java

Learn Template Method Design Pattern in Java with workflow standardization, Spring JdbcTemplate, batch processing, enterprise frameworks, UML diagrams, Java implementation, and real-world examples.

JavaDesign PatternsTemplate MethodBehavioral PatternSpring FrameworkEnterprise Architecture

System Design

Visitor Design Pattern in Java

Learn Visitor Design Pattern in Java with double dispatch, object structure traversal, reporting systems, tax calculation engines, AST processing, enterprise use cases, UML diagrams, and interview questions.

JavaDesign PatternsVisitorBehavioral PatternDouble DispatchEnterprise Architecture