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Top 23 Java Data structure Projects
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hello-algo
《Hello 算法》：动画图解、一键运行的数据结构与算法教程。支持 Python, Java, C++, C, C#, JS, Go, Swift, Rust, Ruby, Kotlin, TS, Dart 代码。简体版和繁体版同步更新，English version ongoing
Project mention: Hello-Algo: Interactive Visual Data Structures and Algorithms in 14 Languages | news.ycombinator.com | 2024-08-17 -
InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
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DSA-Bootcamp-Java
This repository consists of the code samples, assignments, and notes for the Java data structures & algorithms + interview preparation bootcamp of WeMakeDevs.
Project mention: Open-Source Java DSA and Interview Prep Bootcamp by WeMakeDevs | news.ycombinator.com | 2024-10-03 -
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SDE-Interview-Questions
Most comprehensive list :clipboard: of tech interview questions :blue_book: of companies scraped from Geeksforgeeks, CareerCup and Glassdoor.
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Leetcode
Solutions to LeetCode problems; updated daily. Subscribe to my YouTube channel for more. (by fishercoder1534)
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CodeRabbit
CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
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RoaringBitmap
A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others
Theres actually a whole website about it! I found it useful when I was doing deeper research into ElasticSearch: https://roaringbitmap.org
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A schema.json converter for easier ingestion (likely supporting Avro and Protobuf)
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Iceberg decouples storage from compute. That means your data isn’t trapped inside one proprietary system. Instead, it lives in open file formats (like Apache Parquet) and is managed by an open, vendor-neutral metadata layer (Apache Iceberg).
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Eclipse Collections
Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.
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cyclops-react
An advanced, but easy to use, platform for writing functional applications in Java 8. (by aol)
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Data-Structures-and-Algorithms
A repository that contains all the Data Structures and Algorithms concepts and their implementation in several ways, programming questions and Interview questions. The main aim of this repository is to help students who are learning Data Structures and Algorithms or preparing for an interview. (by thepranaygupta)
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Data-Structures-and-Algorithms
Important data structures and algorithms implemented in Java along with solutions to AlgoExpert problems and some Leetcode problems. (by alpha037)
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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 Data structures discussion
Java Data structures related posts
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How to Pitch Your Boss to Adopt Apache Iceberg?
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Processing data with “Data Prep Kit” (part 2)
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Max severity RCE flaw discovered in widely used Apache Parquet
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Crawling web sites using “Data Prep Kit”
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🔬Public docker images Trivy scans as duckdb datas on Kaggle
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Roaring Bitmap Compression
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Introducing Promptwright: Synthetic Dataset Generation with Local LLMs
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A note from our sponsor - InfluxDB
influxdata.com | 29 Apr 2025
Index
What are some of the best open-source Data structure projects in Java? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | hello-algo | 111,972 |
| 2 | Java | 61,429 |
| 3 | DSA-Bootcamp-Java | 18,874 |
| 4 | CtCI-6th-Edition | 11,415 |
| 5 | SDE-Interview-Questions | 7,422 |
| 6 | java-algorithms-implementation | 4,487 |
| 7 | Leetcode | 3,903 |
| 8 | RoaringBitmap | 3,654 |
| 9 | JCTools | 3,652 |
| 10 | SBE | 3,228 |
| 11 | Apache Avro | 3,053 |
| 12 | data-structures | 2,861 |
| 13 | Apache Parquet | 2,792 |
| 14 | JGraphT | 2,669 |
| 15 | Eclipse Collections | 2,512 |
| 16 | FAANG | 1,841 |
| 17 | cyclops-react | 1,323 |
| 18 | Data-Structures-and-Algorithms | 1,154 |
| 19 | Persistent Collection | 768 |
| 20 | Apache Orc | 724 |
| 21 | Big Queue | 563 |
| 22 | Data-Structures-and-Algorithms | 385 |
| 23 | geekific-youtube | 349 |
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