# oldratlee/fucking-java-concurrency

🎏 Simple showcases of java concurrency problems, seeing 🙈 is believing 🐵

Repository: https://github.com/oldratlee/fucking-java-concurrency
Canonical: https://ross.abutalabs.com/products/fucking-java-concurrency
Homepage: https://github.com/oldratlee/fucking-java-concurrency
Language: Java
License: Apache-2.0
License Family: permissive
Topics: java, concurrency, demo, showcase, concurrent-programming, concurrency-problem, concurrency-issue, concurrency-gotchas, thread-safety, parallelism, multithreading, multi-threading, deadlock, sync, synchronization
Last push: 2026-07-31T19:42:37+00:00

## Health v2 (maintenance only)
Score: 75/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 95, release rhythm 35, longevity 100
- inputs: {"age_days": 4462, "days_push": 33, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1218, forks 345 (observed 2026-08-28T04:04:01.645034+00:00)

## What it is
A collection of simple, runnable Java demo programs that showcase common concurrency problems such as race conditions, deadlocks, and thread-safety issues. It is an educational resource where seeing the actual buggy behavior is more instructive than reading theory.

## Use cases
- learn java concurrency pitfalls with runnable examples
- demonstrate race conditions to a team or class
- understand why thread-unsafe code fails in practice
- study deadlock and synchronization problems in java
- find real examples of multithreading gotchas for teaching

## When to choose
- you are learning or teaching java multithreading and want observable failure demos
- you need concrete examples of concurrency bugs to justify careful concurrent design
- you want entry-level, minimal code samples of concurrency problems

## When to avoid
- you need a concurrency utility library or framework for production code
- you want in-depth theoretical explanations - the demos intentionally omit discussion
- you work in a language other than java

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: concurrency, developer-tools, testing
- domain: developer-tools, tutorials, programming-languages
- platform: jvm, cross-platform
- tags: java, concurrency, multithreading, thread-safety, demo-showcase, educational

## Member repositories
- oldratlee/fucking-java-concurrency (main) score 75

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:01.645034+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 2026-08-30T06:17:04.827208+00:00, confidence not recorded.
  - readme: https://github.com/oldratlee/fucking-java-concurrency (fetched 2026-08-28T04:04:01.645034+00:00, sha 87aa1933fa95)
  - homepage: https://github.com/oldratlee/fucking-java-concurrency (fetched 2026-08-29T12:24:38.026481+00:00, sha a23ed477d8ba)
- Data as of 2026-08-30T08:39:29.467469+00:00.