Force-directed layout implementation in Java

I've been looking around for a Java implementation of the force-direc开发者_如何学运维ted graph layout algorithm but got no fruits so far. Any help will be appreciated :)

Jung:

http://jung.sourceforge.net/index.html

.. has been around for a while, and has many layout algorithms.

You might also check out Gephi at http://gephi.org/ - it's an application, not a lib, but it's open source Java.

There's also Processing (a Java superlanguage) and the physics lib here: http://www.cs.princeton.edu/~traer/physics/random_arboretum/index.html (click in the box a bunch of times to create the graph).

My searching brought up four closely-related results; I don't know what you need it for, but hopefully at least one of them will be helpful:

• Force-based graph project in Java at Google Code
• Force-directed map labeling
• Force-directed map overlays
• The link I posted in the comment brought up VTK, whose website does claim some support for Java though I haven't researched it thoroughly.