ethereum/ethereumj
DEPRECATED! Java implementation of the Ethereum yellowpaper. For JSON-RPC and other client features check Ethereum Harmony observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 8
- Longevity 100
Flags: archived
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4495
- days_rel: n/a
- days_push: 1651
- n_releases_24m: 0
Adoption not part of the score
2183 stars · 1071 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
EthereumJ is a pure-Java implementation of the Ethereum protocol as defined in the yellow paper, usable as a Maven/Gradle dependency or standalone JAR. The project is officially deprecated and no longer maintained, with JSON-RPC client features moved to Ethereum Harmony.
Use cases
- embed ethereum protocol support in a java application
- run an ethereum node from the jvm
- interact with the ethereum blockchain in java
- build blockchain tools on top of the ethereum protocol
- learn how the ethereum yellow paper is implemented
When to choose
- you need a java/jvm library implementing the ethereum protocol for a legacy codebase
- you want to study a reference implementation of the ethereum yellow paper
When to avoid
- you need an actively maintained ethereum client
- you need JSON-RPC or full client features (use Ethereum Harmony or other clients)
- you are starting a new project today
Facets
library · maturity abandoned
sdk cryptography networking blockchain developer-tools jvm cross-platform ethereum blockchain-client deprecated yellowpaper smart-contracts cryptocurrency
1 source
- readme: https://github.com/ethereum/ethereumj · fetched 2026-08-28 · 5963887a2c96
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| ethereum/ethereumj | main | 10 |
For agents
markdown · JSON · MCP: product_card(name="ethereum/ethereumj")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem