Java

Java programming tutorials, design patterns, and best practices

28 articles

Java 8 min read

Gradle Multi-Module Projects: The Architecture That Scales From Startup to Enterprise

Stop copying code between projects. Learn how to structure Gradle multi-module projects that enforce boundaries, speed up builds, and make your codebase maintainable.

#gradle #java #architecture +2 more

Dec 7, 2025 Read more

Java 16 min read

Spring Boot 3 + Spring AI: Build Production-Ready AI Apps in Java (2025 Complete Guide)

Master Spring AI with this comprehensive 2025 guide. Learn to build production-ready AI applications in Java with OpenAI, Ollama, RAG systems, vector stores, and complete code examples.

#ai #java #spring-boot +4 more

Nov 30, 2024 Read more

Java 4 min read

The Visitor Design Pattern: Add Operations Without Modifying Classes

Master the Visitor Pattern in Java. Learn how to add new operations to object structures using double dispatch.

#ai #java #design-patterns +3 more

Nov 29, 2024 Read more

Java 3 min read

The Template Method Pattern: The Recipe for Success

Master the Template Method Pattern in Java. Learn how to define the skeleton of an algorithm in a superclass but let subclasses override specific steps.

#ai #java #design-patterns +3 more

Nov 27, 2024 Read more

Java 4 min read

The Strategy Design Pattern: Kill the If-Else Statements

Master the Strategy Pattern in Java. Learn how to replace complex if-else logic with interchangeable algorithms and follow the Open/Closed Principle.

#ai #java #design-patterns +3 more

Nov 25, 2024 Read more

Java 3 min read

The State Design Pattern: Machines with Personality

Master the State Pattern in Java. Learn how to let an object alter its behavior when its internal state changes, replacing massive switch statements.

#ai #java #design-patterns +3 more

Nov 23, 2024 Read more

Java 3 min read

The Observer Design Pattern: Don't Call Us, We'll Call You

Master the Observer Pattern in Java. Learn how to implement event-driven architectures and decouple data sources from listeners.

#ai #java #design-patterns +3 more

Nov 21, 2024 Read more

Java 3 min read

The Memento Design Pattern: Time Travel for Objects

Master the Memento Pattern in Java. Learn how to capture and restore an object's internal state for undo/redo functionality.

#ai #java #design-patterns +3 more

Nov 19, 2024 Read more

Java 4 min read

The Mediator Design Pattern: Centralize Complex Communications

Master the Mediator Pattern in Java. Learn how to reduce coupling by having objects communicate through a mediator instead of directly.

#ai #java #design-patterns +3 more

Nov 17, 2024 Read more

Java 3 min read

The Iterator Design Pattern: Loop Abstraction

Master the Iterator Pattern in Java. Learn how to access elements of a collection sequentially without exposing its underlying representation.

#ai #java #design-patterns +3 more

Nov 15, 2024 Read more

Java 4 min read

The Interpreter Design Pattern: Build Your Own Language

Master the Interpreter Pattern in Java. Learn how to define grammar and evaluate expressions for custom languages and DSLs.

#ai #java #design-patterns +3 more

Nov 13, 2024 Read more

Java 3 min read

The Command Design Pattern: Turning Actions into Objects

Master the Command Pattern in Java. Learn how to encapsulate requests as objects to enable Undo/Redo, queuing, and macro commands.

#ai #java #design-patterns +3 more

Nov 11, 2024 Read more

Java 3 min read

The Chain of Responsibility Pattern: Pass It Down

Master the Chain of Responsibility Pattern in Java. Learn how to pass requests along a chain of handlers until one of them handles it.

#ai #java #design-patterns +3 more

Nov 9, 2024 Read more

Java 3 min read

The Proxy Design Pattern: The Gatekeeper

Master the Proxy Pattern in Java. Learn how to control access to objects, implement lazy loading, and add security layers.

#ai #java #design-patterns +3 more

Nov 7, 2024 Read more

Java 4 min read

The Flyweight Design Pattern: Share to Save Memory

Master the Flyweight Pattern in Java. Learn how to support thousands of objects efficiently by sharing common state.

#ai #java #design-patterns +3 more

Nov 5, 2024 Read more

Java 3 min read

The Facade Design Pattern: The Simple Button for Complex Systems

Master the Facade Pattern in Java. Learn how to hide system complexity behind a simple interface and making your libraries easier to use.

#ai #java #design-patterns +3 more

Nov 3, 2024 Read more

Java 3 min read

The Decorator Design Pattern: Dynamic Superpowers

Master the Decorator Pattern in Java. Learn how to add features to objects dynamically without inheritance explosions. The ultimate 'Wrapper' pattern.

#ai #java #design-patterns +3 more

Nov 1, 2024 Read more

Java 3 min read

The Composite Design Pattern: Trees Everywhere

Master the Composite Pattern in Java. Learn how to treat individual objects and compositions uniformly using recursive tree structures.

#ai #java #design-patterns +3 more

Oct 30, 2024 Read more

Java 3 min read

The Bridge Design Pattern: Decouple Abstraction from Implementation

Master the Bridge Pattern in Java. Learn how to avoid class explosion by separating abstraction and implementation hierarchies.

#ai #java #design-patterns +3 more

Oct 28, 2024 Read more

Java 3 min read

The Adapter Design Pattern: Making Incompatible Code Work Together

Master the Adapter Design Pattern in Java. Learn how to integrate legacy code and 3rd-party libraries using the 'Travel Adapter' concept.

#ai #java #design-patterns +3 more

Oct 26, 2024 Read more

Java 4 min read

The Prototype Design Pattern: Copy Don't Create

Master the Prototype Pattern in Java. Learn how to clone objects efficiently instead of creating expensive instances from scratch.

#ai #java #design-patterns +3 more

Oct 24, 2024 Read more

Java 4 min read

The Builder Design Pattern: The Cure for Constructor Headache

Master the Builder Pattern in Java. Learn how to construct complex objects step-by-step, avoid telescoping constructors, and write readable code.

#ai #java #design-patterns +3 more

Oct 22, 2024 Read more

Java 3 min read

The Abstract Factory Pattern: Families of Objects

Master the Abstract Factory Pattern in Java. Learn how to create families of related objects without specifying their concrete classes.

#ai #java #design-patterns +3 more

Oct 20, 2024 Read more

Java 4 min read

The Factory Method Pattern: Decoupling Object Creation

Master the Factory Method Pattern in Java. Learn how to loosen coupling in your code by letting subclasses decide which objects to instantiate.

#ai #java #design-patterns +3 more

Oct 18, 2024 Read more

Java 4 min read

Understanding Final Classes in Java

Learn when and why to use final classes in Java. Understand the design principle of prohibiting inheritance for better code safety.

#java #core-java #inheritance +1 more

Jan 6, 2020 Read more

Java 5 min read

Lombok: Reduce Java Boilerplate Code

Complete guide to Project Lombok for Java. Learn how to eliminate boilerplate code with annotations like @Data, @Builder, and @RequiredArgsConstructor.

#java #lombok #spring-boot +1 more

Dec 22, 2019 Read more

Java 4 min read

Singleton Design Pattern in Java: Part 2

Advanced singleton implementations including Double-Checked Locking with volatile and the Bill Pugh pattern using static inner classes.

#java #design-patterns #singleton +1 more

Dec 19, 2019 Read more

Java 5 min read

Singleton Design Pattern in Java: Part 1

Deep dive into the Singleton design pattern in Java. Learn different implementation approaches including eager initialization and lazy loading.

#java #design-patterns #singleton +1 more

Dec 18, 2019 Read more