jfreechart-0.9.20，是十分优秀的图表显示工具。以其丰富的样式和强大的数据集成功能，深得广大的统计图表开发者的喜爱。这个版本里的demo带有源码，可以供使用者参考，非常有效。-jfreechart - 0.9.20, is a very good tool according to a chart. His rich and powerful forms of data integration, won the majority of the statistical charts

JFreeChart-1.0-12 官方示例的源码，相当有用-JFreeChart-1.0-12 official sample of the source, very useful

JFreeChart is a comprehensive free chart library for the Java(tm) platform that can be used on the client-side (JavaFX and Swing) or the server side