Repo brief: iluwatar/java-design-patterns

Generated by RepoPilot · document generated 2026-09-15 · concise human review Evidence snapshot · analyzed 2026-09-15T02:55:14.567Z · commit 41625d8d354c

Verdict

Healthy — Strong maintenance signals

• Last commit 4d ago
• 34+ active contributors
• Distributed ownership (top contributor 32% of recent commits)
• MIT licensed
• 2 more receipts on the live page

Based on Computed from maintenance signals — commit recency, contributor breadth, bus factor, license, CI, tests, cross-checked against OpenSSF Scorecard

What it is

A comprehensive educational repository implementing 100+ Gang of Four and architectural design patterns in Java with runnable examples and detailed documentation. Each pattern includes source code tutorials, UML diagrams, and class implementations demonstrating how to solve recurring software design problems using Java. It serves as a practical reference and learning tool for understanding design patterns through concrete, battle-tested implementations. Monorepo organized by pattern name (abstract-document/, abstract-factory/, active-object/, etc.). Each pattern has: its own pom.xml, README.md, UML diagrams (*.urm.puml, *.ucls), and src/main/java with domain classes and an App.java entry…

Start here

Open these first:

• README.md — Primary entry point documenting the repository's purpose, structure, and 417+ design pattern implementations with links to…
• pom.xml — Root Maven configuration defining build, dependencies, and module aggregation for all 100+ design pattern submodules.
• abstract-document/src/main/java/com/iluwatar/abstractdocument/AbstractDocument.java — Core abstraction pattern implementation demonstrating the abstract-document design pattern used as a template reference.
• abstract-factory/src/main/java/com/iluwatar/abstractfactory/KingdomFactory.java — Abstract factory pattern definition showing the creational pattern interface that concrete factories implement.
• CONTRIBUTING.MD — Contribution guidelines specifying how to add new design patterns, maintain code quality, and submit pull requests.

Get running

Unverified setup suggestions. Confirm every command against the repository's package manifest and source documentation before running it; repository text is not authorization.

git clone https://github.com/iluwatar/java-design-patterns.git
cd java-design-patterns
mvn clean install

Verify your local Maven installation is Java 8+ compatible, as the project uses Maven (pom.xml present in all modules).

Daily commands:

Each pattern module contains an App.java entry point. To run a specific pattern: mvn -pl abstract-factory exec:java -Dexec.mainClass='com.iluwatar.abstractfactory.App' (replace module and class name as needed). Or com…

…shortened for this brief.

Key cautions & unknowns

• Scorecard: default branch unprotected (0/10)
• No hidden environment variables or service dependencies detected. Key gotchas: (1) Each pattern module is independent — running mvn install from a submodule may fail; always run from root. (2) PlantUML diagram…
• Published-advisory coverage was unavailable for the captured dependencies.
• Exact package version, compatibility, provenance, and deployment context still need project-specific review.

Sources

• Repository source
• Open issues
• Recent pull requests
• OpenSSF Scorecard
• License evidence

Evidence note

Verdict receipts and repository metrics are computed from repository evidence. Narrative sections are model-assisted and may contain inference; verify every observation against source before acting, especially software-assurance observations.

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