https://zetcode.com/java/jfreechart/ https://stackoverflow.com/questions/40105094/jfreechart-horizontal-stacked-bar-chart-with-date-axis https://www.jfree.org/jfreechart/api/javadoc/org/jfree/data/category/CategoryDataset.html https://www.jfree.org/jfreechart/api/javadoc/org/jfree/data/jdbc/JDBCCategoryDataset.html https://twitter.com/GeoffreyDeSmet/status/1373614799125426183 https://twitter.com/dawntraoz/status/1380521399723438088 https://www.codewall.co.uk/best-javascript-chart-libraries/ https://www.jfree.org/jfreechart/samples.html https://www.jfree.org/forum/viewtopic.php?t=26013 https://stackoverflow.com/questions/28494575/how-to-make-jfree-chart-to-take-non-empty-series-data-set-to-plot-range-axis check "TimeSeriesCollection" check "createTimeSeriesChart" https://www.hebergementwebs.com/tutoriel-jfreechart/jfreechart-guide-rapide no excel-like tables-below-chart, sadly https://www.jfree.org/forum/viewtopic.php?t=14389 How to combine line chart and bar chart in JFreeChart https://www.boraji.com/how-to-combine-line-chart-and-bar-chart-in-jfreechart JFreeChart: Stacked Bar Chart Demo 4 : Bar Stacked Chart http://www.java2s.com/Code/Java/Chart/JFreeChartStackedBarChartDemo4.htm includes example of Paint. stacked bar charts https://chartio.com/learn/charts/stacked-bar-chart-complete-guide/
https://chartio.com/learn/business-intelligence/domo-vs-tableau-vs-chartio/
StackedBarRenderer, GroupedStackedBarRenderer