JFreeChart BarChart -> NO gradient

Question

my bar chart is always drawn with a gradient color by default. I just want a simple color without any styled effects.

Can anyone help ?

Code:

   final JFreeChart chart = ChartFactory.createBarChart(         "",         // chart title         xLabel,               // domain axis label         yLabel,                  // range axis label         dataset,                  // data         PlotOrientation.VERTICAL, // orientation         true,                     // include legend         false,                     // tooltips?         false                     // URLs?     );    final CategoryPlot plot = chart.getCategoryPlot();   // SOMETHING HAS TO BE DONE HERE    showChart(chart); // Simply shows the chart in a new window 

Thanks

Answer 1

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.

Answer 2

Before you create the chart from ChartFactory you can set the chart theme:

ChartFactory.setChartTheme(StandardChartTheme.createLegacyTheme()); 

The default is the JFreeTheme which adds the gradient. The following themes are available:

ChartFactory.setChartTheme(StandardChartTheme.createJFreeTheme()); ChartFactory.setChartTheme(StandardChartTheme.createDarknessTheme());