ezylang/EvalEx
EvalEx is a handy expression evaluator for Java, that allows to evaluate simple mathematical and boolean expressions. observed · 2026-10-14
Health v2 · maintenance only
89/100
- Activity 97
- Release rhythm 73
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 79.0
- age_days: 5057
- days_rel: 102
- days_push: 22
- n_releases_24m: 5
Adoption not part of the score
1116 stars · 293 forks observed · 2026-10-14
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
EvalEx is a Java library for parsing and evaluating mathematical, boolean, string, date-time, array, and structure expressions. It uses BigDecimal for precise arithmetic, supports custom functions and operators, and has no external dependencies.
Use cases
- evaluate user-entered math formulas in a Java app
- parse and evaluate boolean expressions at runtime
- compute expressions with BigDecimal precision
- allow users to define custom formulas with variables
- evaluate expressions over JSON-like arrays and structures
- add a safe expression engine to a rules engine or calculator
When to choose
- you need a lightweight, dependency-free expression evaluator on the JVM
- you need arbitrary-precision decimal math with configurable rounding
- you want extensible custom functions and operators
- you need string, date-time, array, and structure support in expressions
When to avoid
- you need a full scripting language rather than expression evaluation
- your project requires Java below version 11
- you need extremely high-performance bulk evaluation of millions of expressions
Facets
library · maturity stable
parser interpreter math developer-tools programming-languages jvm expression-evaluator expression-parser bigdecimal no-dependencies formula-evaluation algorithms
2 sources
- readme: https://github.com/ezylang/EvalEx · fetched 2026-10-14 · 29a4003eacac
- homepage: https://ezylang.github.io/EvalEx/ · fetched 2026-08-29 · d20027bef4d1
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| ezylang/EvalEx | main | 89 |
For agents
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem