Java Code

Open-source Java projects categorized as Code

Top 4 Java Code Projects

  • opengrok

    OpenGrok is a fast and usable source code search and cross reference engine, written in Java

    Project mention: Sourcegraph is no longer Open Source | | 2023-07-04

    [4] is not really a usable 'product'. Livegrep ( was inspired by it and is very usable.

    [3] used to be a Google open source project as well, but it fell out of maintenance, and Sourcegraph took it over. It powers most of the basic regex/literal search in Sourcegraph.

    Mozilla's code is searchable in Searchfox ( which uses the indexer from Livegrep, combined with their own Git indexer and language-specific cross reference databases.

    OpenGrok ( is also rather well known, but I have found it to have a slightly worse UI than alternatives.

  • Code Scanner

    Code scanner library for Android, based on ZXing

  • Onboard AI

    Learn any GitHub repo in 59 seconds. Onboard AI learns any GitHub repo in minutes and lets you chat with it to locate functionality, understand different parts, and generate new code. Use it for free at

  • Joo

    Joo is a clean, fast, static typed, general purpose programming language created to run on machines with extremely low resources like the Arduino UNO

  • ReactiveSpring

    Reactive Programming in Spring

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-07-04.

Java Code related posts


What are some of the best open-source Code projects in Java? This list will help you:

Project Stars
1 opengrok 3,979
2 Code Scanner 1,031
3 Joo 3
4 ReactiveSpring 0
Free Global Payroll designed for tech teams
Building a great tech team takes more than a paycheck. Zero payroll costs, get AI-driven insights to retain best talent, and delight them with amazing local benefits. 100% free and compliant.