nashorn vs reeva

nashorn

https://openjdk.org/projects/nashorn (by openjdk)

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reeva

A JavaScript engine for the JVM, built from the ground up with Kotlin. (by ReevaJS)

JavaScript Kotlin Jvm Engine ECMAScript javascript-engine Interpreter HacktoberFest

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nashorn		reeva
	Project
10	Mentions	5
345	Stars	80
0.0%	Growth	-
0.0	Activity	5.9
about 1 year ago	Latest Commit	3 months ago
Java	Language	Kotlin
GNU General Public License v3.0 only	License	BSD 2-clause "Simplified" License

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

nashorn

Posts with mentions or reviews of nashorn. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-12-10.

A list of JavaScript engines, runtimes, interpreters
23 projects | /r/learnjavascript | 10 Dec 2023

nashorn
I'm not a programmer, my fiance is. Sometimes I like to show him memes from here and he'll explain them to me. Now I'm just confused. (The meme was someone labeled JavaScript bowing to someone named PHP while other programming languages looked in shock.)
1 project | /r/ProgrammerHumor | 27 Feb 2023

I mean...
What challenges are there moving from Java 8 to 17?
3 projects | /r/java | 20 Dec 2022

It's still maintained by the open jdk team here: https://github.com/openjdk/nashorn
Java 16 - How can i run a JavaScript function in my Java code?
1 project | /r/javahelp | 21 Jun 2022
Call JavaScript From Java
4 projects | /r/javahelp | 24 May 2022
Java isn't js
1 project | /r/ProgrammerHumor | 26 Feb 2022

Although Java includes Javascript, or at least it used to. These days it has been taken out as a separate library (https://github.com/openjdk/nashorn), which honestly makes even more sense for the metaphor.
A JavaScript engine for the JVM, built from the ground up with Kotlin
3 projects | /r/Kotlin | 1 Dec 2021
JDK 17: General Availability
2 projects | /r/programming | 14 Sep 2021

What prevents you from using https://github.com/openjdk/nashorn? It's available on maven

reeva

Posts with mentions or reviews of reeva. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-12-01.

GitHub - ReevaJS/reeva: A JavaScript engine for the JVM, built from the ground up with Kotlin.
1 project | /r/Kotlin | 2 Dec 2021
Being written in Kotlin, the code quality of the project is important
1 project | /r/programmingcirclejerk | 1 Dec 2021
A JavaScript engine for the JVM, built from the ground up with Kotlin
3 projects | /r/Kotlin | 1 Dec 2021

1 project | /r/javascript | 1 Dec 2021
A JavaScript engine written in Kotlin
1 project | news.ycombinator.com | 1 Dec 2021

What are some alternatives?

When comparing nashorn and reeva you can also consider the following projects:

rhino - Rhino is an open-source implementation of JavaScript written entirely in Java

zipline - Run Kotlin/JS libraries in Kotlin/JVM and Kotlin/Native programs

jdk-mc - Recent Java with modifications specific to Minecraft.

2p-kt - A Kotlin Multi-Platform ecosystem for symbolic AI

KorGE - KorGE Game Engine. Multiplatform Kotlin Game Engine

cglib - cglib - Byte Code Generation Library is high level API to generate and transform Java byte code. It is used by AOP, testing, data access frameworks to generate dynamic proxy objects and intercept field access.

klock - Multiplatform Date and time library for Kotlin

Kotlin Spotify Web API - Spotify Web API wrapper for Kotlin, Java, JS, and Native - Targets JVM, Android, JS (browser), Native (Desktop), and Apple tvOS/iOS. Includes a Spotify Web Playback SDK wrapper for Kotlin/JS, and a spotify-auth wrapper for Kotlin/Android.