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Editorial Team
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Asked: 2026-06-03T08:27:56+00:00

I am creating a Bar Chart: final JFreeChart result = ChartFactory.createBarChart(TITLE, // chart title

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I am creating a Bar Chart:

final JFreeChart result = ChartFactory.createBarChart(TITLE, // chart title
    X_TITLE, // domain axis label
    Y_TITLE, // range axis label
    dataset, // data
    PlotOrientation.HORIZONTAL, // the plot orientation
    true, // legend
    true, // tooltips
    false // urls
    );

I then added a ChartMouseListener as described here.

When I click on a legend item, “LegendItemEntity: seriesKey=null, dataset=null” is displayed.

How do I access the legend text for the corresponding item?

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1 Answer

  1. Editorial Team

    Starting from org.jfree.chart.demo.BarChartDemo1 and adding the same ChartMouseListener to the source yields results like this:

    LegendItemEntity: seriesKey=First, dataset=org.jfree.data.category.DefaultCategoryDataset@d9510071
LegendItemEntity: seriesKey=Second, dataset=org.jfree.data.category.DefaultCategoryDataset@d9510071
LegendItemEntity: seriesKey=Third, dataset=org.jfree.data.category.DefaultCategoryDataset@d9510071

    If you’re geting a different result, an sscce may help.

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