Hide some category labels in JFreeChart to avoid overlapping

Question

I\'m generating a StackedBarChart using JFreeChart. Depending on the input data I can have a lot of categories (usually between 20 and 40), leading to overlapping of the lab

Answer 1

You can use setVerticalTickLabels(true) on your domain axis, as shown in this example.

Addendum: Oops, the example cited is for a ValueAxis. For a CategoryAxis, as used in StackedBarChart, you have even more flexility with the method setCategoryLabelPositions(). Typical usage is illustrated in the BarChartDemo1 source, shown here.

Answer 2

One simple solution is to set the Category lables to the backround colour (in this case white).

    CategoryPlot plot = (CategoryPlot) chart.getPlot();
    CategoryAxis domainAxis = plot.getDomainAxis();
    domainAxis.setTickLabelPaint("Category 2", Color.white);
    domainAxis.setTickLabelPaint("Category 4", Color.white);

This will produce a chart like this