Good Java graph algorithm library

Question

Has anyone had good experiences with any Java libraries for Graph algorithms  I ve tried JGraph and found it ok  and there are a lot of different ones in google  Are there any that people are actually using successfully in production code or would recommend   To clarify  I m not looking for a library that produces graphs charts  I m looking for one that helps with Graph algorithms  eg minimum spanning tree  Kruskal s algorithm Nodes  Edges  etc  Ideally one with some good algorithms data structures in a nice Java OO API

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In a university project I toyed around with yFiles by yWorks and found it had pretty good API

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If you are actually looking for Charting libraries and not for Node Edge Graph libraries I would suggest splurging on Big Faceless Graph library  BFG    It s way easier to use than JFreeChart  looks nicer  runs faster  has more output options  really no comparison

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Check out JGraphT for a very simple and powerful Java graph library that is pretty well done and  to allay any confusion  is different than JGraph  Some sample code   UndirectedGraph lt String  DefaultEdge gt  g           new SimpleGraph lt String  DefaultEdge gt  DefaultEdge class        String v1    v1       String v2    v2       String v3    v3       String v4    v4           add the vertices     g addVertex v1       g addVertex v2       g addVertex v3       g addVertex v4           add edges to create a circuit     g addEdge v1  v2       g addEdge v2  v3       g addEdge v3  v4       g addEdge v4  v1

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If you were using JGraph  you should give a try to JGraphT which is designed for algorithms   One of its features is visualization using the JGraph library  It s still developed  but pretty stable  I analyzed the complexity of JGraphT algorithms some time ago   Some of them aren t the quickest  but if you re going to implement them on your own and need to display your graph  then it might be the best choice   I really liked using its API  when I quickly had to write an app that was working on graph and displaying it later

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Instructional graph algorithm implementations in java could be found here  by prof  Sedgewick et al    http   algs4 cs princeton edu code   I was introduced to them while attending these exceptional algorithm courses on coursera  also taught by prof  Sedgewick    https   www coursera org course algs4partI  https   www coursera org course algs4partII

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JGraph from http   mmengineer blogspot com 2009 10 java-graph-floyd-class html  Provides a powerfull software to work with graphs  direct or undirect   Also generates Graphivz code  you can see graphics representations  You can put your own code algorithms into pakage  for example  backtracking code  The package provide some algorithms  Dijkstra  backtracking minimun path cost  ect

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http   neo4j org  is a graph database that contains many of graph algorithms and scales better than most in-memory libraries

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Try Annas its an open source graph package which is easy to get to grips with  http   annas googlecode com

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check out Blueprints   Blueprints is a collection of interfaces  implementations  ouplementations  and test suites for the property graph data model  Blueprints is analogous to the JDBC  but for graph databases   Within the TinkerPop open source software stack  Blueprints serves as the foundational technology for   Pipes  A lazy  data flow framework  Gremlin  A graph traversal language  Frames  An object-to-graph mapper  Furnace  A graph algorithms package  Rexster  A graph server

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JDSL  Data Structures Library in Java  should be good enough if you re into graph algorithms - http   www cs brown edu cgc jdsl

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JUNG is a good option for visualisation  and also has a fairly good set of available graph algorithms  including several different mechanisms for random graph creation  rewiring  etc  I ve also found it to be generally fairly easy to extend and adapt where necessary

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I don t know if I d call it production-ready  but there s jGABL

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Apache Commons offers commons-graph  Under  http   svn apache org viewvc commons sandbox graph trunk  one can inspect the source  Sample API usage is in the SVN  too  See https   issues apache org jira browse SANDBOX-458 for a list of implemented algorithms  also compared with Jung  GraphT  Prefuse  jBPT  Google Guava if you need good datastructures only   JGraphT is a graph library with many Algorithms implemented and having   in my oppinion  a good graph model  Helloworld Example  License  LGPL EPL   JUNG2 is also a BSD-licensed library with the data structure similar to JGraphT  It offers layouting algorithms  which are currently missing in JGraphT  The most recent commit is from 2010 and packages hep aida   are LGPL  via the colt library  which is imported by JUNG   This prevents JUNG from being used in projects under the umbrella of ASF and ESF  Maybe one should use the github fork and remove that dependency  Commit f4ca0cd is mirroring the last CVS commit  The current commits seem to remove visualization functionality  Commit d0fb491c adds a  gitignore   Prefuse stores the graphs using a matrix structure  which is not memory efficient for sparse graphs  License  BSD  Eclipse Zest has built in graph layout algorithms  which can be used independently of SWT  See org eclipse zest layouts algorithms  The graph structure used is the one of Eclipse Draw2d  where Nodes are explicit objects and not injected via Generics  as it happens in Apache Commons Graph  JGraphT  and JUNG2

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http   incubator apache org hama  is a distributed scientific package on Hadoop for massive matrix and graph data

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If you need performance  you might take a look at Grph  The library is developed in the French University and CNRS Inria   http   www i3s unice fr  hogie grph   The project is active and reactive support is provided

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Summary    JGraphT if you are more interested in data structures and algorithms  JGraph if your primary focus is visualization  Jung  yWorks  and BFG are other things people tried using  Prefuse is a no no since one has to rewrite most of it  Google Guava if you need good datastructures only  Apache Commons Graph  Currently dormant  but provides implementations for many algorithms  See https   issues apache org jira browse SANDBOX-458 for a list of implemented algorithms  also compared with Jung  GraphT  Prefuse  jBPT

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It s also good to be convinced that a Graph can be represented as simply as     class Node      int value     List lt Node gt  adj      and implement most the algorithms you find interesting by yourself  If you fall on this question in the middle of some practice learning session on graphs  that s the best lib to consider      You can also prefer adjacency matrix for most common algorithms     class SparseGraph     int   nodeValues    List lt Integer gt    edges           or a matrix for some operations     class DenseGraph     int   nodeValues    int     edges

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For visualization our group had some success with prefuse   We extended it to handle architectural floorplates and bubble diagraming  and it didn t complain too much   They have a new Flex toolkit out too called Flare that uses a very similar API   UPDATE  I d have to agree with the comment  we ended up writing a lot of custom functionality working around prefuse limitations   I  can t say that starting from scratch would have been better though as we were able to demonstrate progress from day 1 by using prefuse   On the other hand if we were doing a second implementation of the same stuff  I might skip prefuse since we d understand the requirements a lot better

[java] Good Java graph algorithm library?

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