JCommon is a Java class library that is used by JFreeChart, Pentaho Reporting and a few other projects. The library contains miscellaneous classes that support: * configuration and dependency management code * a general logging framework

JFreeChart是Java图表生成组件，可以创建饼图、曲线图、柱状图、甘特图，生成PNG、JPG等图片格式的图表文件。-JFreeChart is a chart generated Java component, you can create pie charts, graphs, bar charts, Gantt chart, generate PNG, JPG and other image format chart file.

jfreechart1.013开发包,能够开发非常漂亮的报表,可以用于创建很多图表,时间序列图,柱形图等等.-Contain:jfreechart-1.0.13.jar and jcommon-1.0.15.jar.They can be used to create beatiful reports and many charts.such as bars and timeseries and so on.