JFreeChart BarChart -> NO gradient

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The problem lies in the BarPainter you are using. The JFreeChart version 1.0.13 default is to use GradientBarPainter which adds a metallic-ish look to the bar. If you want the “old” look the solution is to use the StandardBarPainter.

final CategoryPlot plot = chart.getCategoryPlot();
((BarRenderer) plot.getRenderer()).setBarPainter(new StandardBarPainter());

That should do it.

Alternatively, if you want use JFreeChart’s BarRenderer, you could force it to use the StandardBarPainter by calling the static method setDefaultBarPainter() before initializing your renderer.

final CategoryPlot plot = chart.getCategoryPlot();
BarRenderer.setDefaultBarPainter(new StandardBarPainter());
((BarRenderer) plot.getRenderer()).setBarPainter(new BarPainter());

If you want more control of the chart you can always build it from the ground up instead of using ChartFactory, but that does require a lot extra code.

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