JGraphT Logo

a Java library of graph theory data structures and algorithms

now with Python bindings too!


any object can be used for vertex and edge types, with full type safety via generics
edges can be directed or undirected, weighted or unweighted
simple graphs, multigraphs, and pseudographs
unmodifiable graphs allow modules to provide “read-only” access to internal graphs
listenable graphs allow external listeners to track modification events
live subgraph views on other graphs
compositions and converter views for combining and adapting graphs
customizable incidence and adjacency representations


specialized iterators for graph traversal (DFS, BFS, etc)
algorithms for path finding, clique detection, isomorphism detection, coloring, common ancestors, tours, connectivity, matching, cycle detection, partitions, cuts, flows, centrality, spanning, and the list goes on
live adapters to other graph libraries such as JGraphX visualization and Guava Graphs
generators and transforms


designed for performance, with near-native speed in many cases
adapters for memory-optimized fastutil representation
sparse representations for immutable graphs

Fork me on GitHub



JGraphT releases are published to the Maven Central Repository, so you can easily add us as a dependency to your project:


(There are also instructions for how to use the latest SNAPSHOT build instead.)

Development Environment

First, find out how to set up your favorite IDE (or the command line) to work with JGraphT.

Hello JGraphT

Next, try compiling and running the hello world example.

Once you get that working, dig into the user guide to learn more about JGraphT!


Latest Release

For development without Maven, or for running demos from the command line, you can download a full archive of the release:


Regardless of which archive format you download, you’ll have the same release contents after unpacking.

Historical Releases

Older releases are also available. They have less functionality, but may be useful with obsolete JDK’s or JRE’s.


 Get answers on StackOverflow

 Browse known issues or report a new issue

 Join the user mailing list

 Check out open pull requests

 Learn how to contribute your first improvement

 Tell us your success story: how are you are using JGraphT?

 Cite JGraphT in your research


2-May-2023: Release 1.5.2 is now available!

29-Jun-2020: First Release of Python Bindings!

Read the announcement here.

14-Jun-2020: Release 1.5.0 is now available!

Read the release announcement for more info.

21-May-2020: JGraphT Research Paper Published!

Our paper, published in the ACM Transactions on Mathematical Software, provides an in-depth look at the design of JGraphT, and also includes performance comparisons against other libraries.

21-Feb-2020: Release 1.4.0 is now available!

Read the release announcement for more info.


The JGraphT team is grateful to all of our contributors over the years for making the project what it is today!

JGraphT is dual-licensed under LGPL 2.1 and EPL 2.0. As a recipient of JGraphT, you may choose which license to receive the code under. Licensing information for libraries on which the project depends is available in the README.

Project development takes place on github, but we still make use of sourceforge for some resources as well.

This website is built using Jekyll, with help from the SinglePaged theme and the Primer theme.

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