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The documentation for getSeriesStroke says that it should never return null. I even manually set that flag on the renderer, and it's still returning null. Not sure what's up with that. So eventually decided "Screw it, I'll just set the first fifty." I still don't know how to get how many series that...

I removed the offending line, and it's fixed now. All good. The renderer was probably an instance of DefaultCategoryItemRenderer, but I replaced the code with this, and the resulting graph is still the same. I have a main function testing it with a BarChart and a Linechart. Hello is printed twice as...

I'm trying to write a wrapper library that will let me use JFreeChart easier with my Discord bot. It's almost completely done, I've just run into a couple of snags. Here's a google drive folder with some images of the charts that I'm working on. https://drive.google.com/drive/folders/1Ubbp7Bw6dWzM4G...