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Top 13 Java Command-line Projects
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picocli
Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.
His project uses picocli for argument parsing. I briefly looked through the documentation and realized it was pretty similar to the clap crate I used for my project. So I mimicked his other code as well as my own understanding of clap. This part was easy.
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airline
Java annotation-based framework for parsing Git like command line structures with deep extensibility (by rvesse)
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BatchPDFSign
CLI Command line tool to digital signature of PDF files with PKCS12 certificate. You can find the executable in the releases.
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Java-Beginner-Projects
Explore a variety of simple, hands-on Java projects ideal for beginners. Sharpen your coding skills while creating command-line applications, games, and practical tools in Java. Perfect for those new to programming or looking to learn Java.
Project mention: How I merged Five Pull Requests, Lose Sanity, and Laugh It Off | dev.to | 2024-10-26PR: Janani-Balasooriya/Java-Beginner-Projects#28 Contribution Summary: This repository is a collection of simple Java projects, and I decided to tackle a Weather App. 🌦️ I developed a straightforward console-based application where users can get weather updates for their current location or any location they input. I made some API calls and did a bit of formatting to make it all work. It’s cleanly coded and modular, making it easy for new Java learners to grasp! 👩💻
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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words
A set of word-based puzzle games for the CLI while you wait for the build to run (by ludovicianul)
Project mention: Ask HN: What was an interesting project you started and finished over a weekend? | news.ycombinator.com | 2024-04-06Starting from Wordle, I've created some additional word-based games that can be played in the terminal: https://github.com/ludovicianul/words
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Project mention: Ask HN: Is there any software you only made for your own use but nobody else? | news.ycombinator.com | 2024-07-04
All the time!
My most recent were tools to improve the AWS commandline experience for s3 and Athena
https://github.com/heuermh/cooper
https://github.com/heuermh/sea-eagle
Both are available via Homebrew
https://github.com/heuermh/homebrew-parquet-tools
I would next like to improve the TUI experience for tabular data, e.g. using the Charm_ Bubbles/Gum table component, but I have yet to investigate how the JVM <--> Go interaction might work.
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Project mention: Ask HN: Is there any software you only made for your own use but nobody else? | news.ycombinator.com | 2024-07-04
All the time!
My most recent were tools to improve the AWS commandline experience for s3 and Athena
https://github.com/heuermh/cooper
https://github.com/heuermh/sea-eagle
Both are available via Homebrew
https://github.com/heuermh/homebrew-parquet-tools
I would next like to improve the TUI experience for tabular data, e.g. using the Charm_ Bubbles/Gum table component, but I have yet to investigate how the JVM <--> Go interaction might work.
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).
Java Command-line discussion
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A note from our sponsor - CodeRabbit
coderabbit.ai | 25 Mar 2025
Index
What are some of the best open-source Command-line projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | picocli | 5,050 |
| 2 | joal | 642 |
| 3 | jmxterm | 524 |
| 4 | airline | 137 |
| 5 | BatchPDFSign | 45 |
| 6 | Java-Beginner-Projects | 31 |
| 7 | commandhunt | 13 |
| 8 | words | 11 |
| 9 | dvt | 11 |
| 10 | tommy | 8 |
| 11 | DirCrypt | 3 |
| 12 | sea-eagle | 0 |
| 13 | cooper | 0 |
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