Free java data visualization library? [closed]

Question

Have you considered looking at GraphViz?

Graphviz (short for Graph Visualization Software) is a package of open-source tools initiated by AT&T Labs Research for drawing graphs specified in DOT language scripts. It also provides libraries for software applications to use the tools. Graphviz is free software licensed under the Eclipse Public License.

You can do some fairly cool stuff with it:

For the timeline part, you should really consider Google Visualization API which contains annoted timelines, ...

Try Protovis, which seems to be the successor of Prefuse and may be a good alternative option. It is written in JavaScript, but a Java Graphical Toolkit is available.

D3.js is the successor of Protovis today. (Recommended by Protovis.)

GraphStream is a possibility.

Check ou:

• http://processing.org/
• http://www.axiis.org/ (not java)
• http://gephi.org/

Further links can be found at:

• http://en.wikipedia.org/wiki/Data_visualization
• http://en.wikipedia.org/wiki/Scientific_visualization

An other alternative is to use JUNG framework. If you are looking for browser/Javascript based libraries as well, checkout three.js

Another library you could consider is JGraph. It works mainly with graphs but you can easily implement a timeline as a one. The project can be found on GitHub https://github.com/jgraph/jgraphx and was recently updated.