# bethrobson/Head-First-Design-Patterns

Code for Head First Design Patterns book (2020)

Repository: https://github.com/bethrobson/Head-First-Design-Patterns
Canonical: https://ross.abutalabs.com/products/head-first-design-patterns
Language: Java
License Family: other
Last push: 2023-12-05T09:09:01+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4510, "days_push": 1002, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3261, forks 1931 (observed 2026-08-28T04:07:52.660281+00:00)

## What it is
Companion source code repository for the Head First Design Patterns book (2nd edition, 2020), written in Java. It provides runnable examples of classic design patterns for readers to compile and study.

## Use cases
- learn design patterns with runnable java examples
- companion code for head first design patterns book
- study observer strategy factory patterns in java
- find example implementations of gof design patterns
- teach software design patterns to students

## When to choose
- you are reading the Head First Design Patterns book and want its code
- you want simple, pedagogical Java examples of common design patterns

## When to avoid
- you need production-ready pattern implementations or libraries
- you want patterns examples in a language other than Java

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: developer-tools
- domain: tutorials, programming-languages, developer-tools
- platform: jvm, cross-platform
- tags: design-patterns, java, book-code, education, software-architecture

## Member repositories
- bethrobson/Head-First-Design-Patterns (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:52.660281+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:23:12.976094+00:00, confidence not recorded.
  - readme: https://github.com/bethrobson/Head-First-Design-Patterns (fetched 2026-08-28T04:07:52.660281+00:00, sha 625943196d77)
- Data as of 2026-08-30T08:39:29.467469+00:00.