I face the task of laying out a weighted graph that will change the number of nodes during runtime. The chosen layout should rearrange the nodes without losing the global topology in order to keep the "amount of visual adjustment" as low as possible for the user. Additional requirement: it should be applicable in a JAVA-environment. Does anyone know the best practices?
I m also stuck with a similar task.
The "fdp" algorithm of Graphviz is based on that approach (http://www.graphviz.org/). Then there's the "FruchtermanReingold" class in the OGDF library (http://www.ogdf.net/) and the "de.cau.cs.kieler.klay.force" Eclipse plugin of the KIELER project (http://www.informatik.uni-kiel.de/en/rtsys/kieler/).
I'm also coming from Java world and at some point used DOT+Graphviz. However, recently I found JavaScript libraries rendering to either html5 canvas or SVG easier to use. I would look into sigma.js (http://sigmajs.org/) or d3 (d3js.org). Especially the latter offers a great level of customization. One of the good thing about Gephi is that it offers force-based layouting algorithms, and sigma.js has its own implementation of Gephi's Force Atlas2 algorithm.
What about the prefuse toolkit (http://www.prefuse.org)? It is very useful.
Just a small remark: if you find that Java libraries are not suitable for you, but JavaScripts ones are, and given that you have to plot stuff from Java, you may want to consider the following path. You can use the JavaScript engine embedded into JDK 6 and later (Mozilla Rhino https://developer.mozilla.org/en-US/docs/Rhino).
However, most of JavaScript plotting libraries require browser to renderer their stuff. Therefore you will need to use env.js (http://www.envjs.com/) to load a script for emulating "headless" browser first, and then load libraries like JQuery Flot, or d3.js. env.js distribution contains nice examples how to load jQuery or Prototype libraries from a Java program.
Hi,
You can use JavaFX. I think that it would adapted to your project.
You can get the official documentation from Oracle here:
http://www.oracle.com/technetwork/java/javafx/documentation/index.html
And you can see a very large number of various samples that show the capacity of this powerful graphical library, just here:
http://download.oracle.com/otndocs/products/javafx/2.2/samples/Ensemble/index.html
Good luck !
The best tool I found for visualizing graphs and networks is GraphThing but if your planning to use some library so that you can program things as per your needs than there are two library a gcc based SNAP(Stanford Network Analysis) or you can use the java based JUNG (http://jung.sourceforge.net/) the best open source available in the domain.
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