www.jfree.org

I can call chart.getLend().setBackground(), but how to change the label color?

you should not expect user have jfree installed in his classpath; you might package the jfree jar files in the jnlp. Webstart allows to package multiple jar files.

I created a CategoryPlot containing two CategoryAxis (domain) and two NumberAxis (range). Two datasets were added into the plot and mapping to different domain axis / value axis / rederer. The value axis and renderer all works fine except that the Second category axis wrongly shows the category of f...