The Big Faceless Organization has released the Big Faceless Graph Library 2.3.2, an $800 payware (more if you want support or to distribute your applications that use the library) Java class library for plotting 2D or shaded 3D pie charts, line graphs, area graphs, bar graphs and exporting them to PNG, GIF and PDF. This seems to be a bug fix release. Java 1.2 or later is required.