private CategoryPlot createBoxAndWhiskerChartPlot(DefaultBoxAndWhiskerCategoryDataset dataset, String yAxisLabel, NumberFormat yAxisNumberFormat) { CategoryAxis xAxis = new CategoryAxis("Data"); NumberAxis yAxis = new NumberAxis(yAxisLabel); yAxis.setNumberFormatOverride(yAxisNumberFormat); BoxAndWhiskerRenderer renderer = new BoxAndWhiskerRenderer(); renderer.setItemMargin(0.10); renderer.setMeanVisible(false); // Improve readability by avoiding low contrast with light colors renderer.setUseOutlinePaintForWhiskers(true); CategoryPlot plot = new CategoryPlot(dataset, xAxis, yAxis, renderer); plot.setOrientation(PlotOrientation.VERTICAL); return plot; }