(The following sequence is the result of my personal subjective evaluation)
[****] Scientific Graphics Toolkit:
http://www.epic.noaa.gov/java/sgt/
* 2-D Contour, * Pixel Plots, * Vector Plots, * Professional
[**] Java chart construction Kit:
http://jcckit.sourceforge.net/
* Small, * Dynamic Charts and Plots, Easy to Understand
[**] ptplot:
http://ptolemy.eecs.berkeley.edu/java/ptplot5.1p1/ptolemy/plot/doc/index.htm
* Print, Easy to Use, * Infinite Range Zooming, Editable Plots, Code IS OK
[**] JopenChart Library and Toolkit:
Http://jopenchart.sourceforge.net/index.shtml
* Logical Class Structure, * Math Graph
JFreeChart:
http://www.jfree.org/jfreechart/index.html
Time Series, High / Low / Open / Close Charts and Candle Stick Charts
[X] jCharts:
http://jcharts.sourceforge.net/index.html
* Radar Chart
[X] JROBIN:
http://www.jrobin.org/
[X] chart2d:
http://chart2d.sourceforge.net//