I personally used JFreeChart is several projects.我个人使用jfreechart是几个项目。 I found it to be of very high quality.我发现它是非常高的质量。
jfreechart

JFreeChart jfreechart is a free Java class library for generating charts, including:是一个自由的Java类库生成图表，其中包括：

* pie charts (2D and 3D); *饼图表（二维和三维） ;
* bar charts (regular and stacked, with an optional 3D effect); *酒吧图表（经常和堆叠，与一个可选的三维效果） ;
* line and area charts; *路线和地区图表;
* scatter plots and bubble charts; *分散的图谋和泡沫图表;
* time series, high/low/open/close charts and candle stick charts; *时间序列，高/低/开启/关闭的海图和蜡烛坚持图表;
* combination charts; *组合图表;
* Pareto charts; *帕累托图表;
* Gantt charts; *甘特图;
* wind plots, meter charts and symbol charts; *风情节，米图表和符号图表;
* wafer map charts; *晶圆地图图表;

Strongly recommended.强烈建议。