ai-agent

java-design-patterns

Name: java-design-patterns
Author: iluwatar

Design patterns implemented in Java

94,771 stars+48★ this week27,368 forksJavaUpdated 10/8/2026100% free · open source

What it does

Provides a comprehensive collection of Java design patterns, allowing developers to learn and implement proven solutions to common software design problems

When to use it

•When building complex software systems and wanting to apply well-established design principles
•When trying to solve a specific software design problem and looking for a proven solution
•When learning Java and wanting to understand how to apply design patterns in real-world applications

Ready-to-paste prompt

Explore the `FactoryMethodPattern` class in the `com/iluwatar/designpatterns/creational/factorymethod` package to see how to implement the Factory Method design pattern

Heads up: Make sure you have Maven installed and configured properly on your system, as the project uses Maven for build and dependency management

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/java-design-patterns && curl -fsSL https://workflowstacks.com/api/skills/java-design-patterns/claude-skill -o ~/.claude/skills/java-design-patterns/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How java-design-patterns works

Codeflow

Free to inspect

Java-design-patterns is a very large Java project (~87k lines across 1357 code files, plus 637 test files). It is a full software project: use it through its install path rather than reading it end to end. Last commit this month, Other license, has a test suite.

Size

Very large codebase

~87k lines · 1357 code files · days to read — use, don't read

Setup

Developer setup

A real software project. Use it via its install path; don't expect to read it all.

Runs on

Java/JVM

No API keys detected

Java 99%

What happens, step by step

Design patterns implemented in Java

You give

Java code

1Read Intro

Introduction to design patterns

README.md

2Get Started

Familiarize with design principles

3Explore Patterns

Browse design patterns

4Contribute Code

Contribute to the project

CONTRIBUTING.MD

You get

Solved problems

Where to start reading

1
README.md
Start here — what it does and how to install it
2
AGENTS.md
The instructions the AI actually follows
3
command/README.md
Inside command/ — an example of what the AI is told to do

What's in each folder

command/Prompts, skills & agent definitions14 files

component/Frontend / UI17 files

adapter/Sub-packages / plugins13 files

pipeline/Workflows / pipelines13 files

localization/Folder568 files

hexagonal-architecture/Folder49 files

page-object/Folder39 files

microservices-api-gateway/Folder38 files

READMEHas testsDocumentedCI checksOther licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🛠️ Technical setup

Expect 20–40 minutes in a terminal — or let your AI agent drive it.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/java-design-patterns && curl -fsSL https://workflowstacks.com/api/skills/java-design-patterns/claude-skill -o ~/.claude/skills/java-design-patterns/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

iluwatar

Language

Java