4.0.1
Released on June 6th, 2026

  • NOTE
     Dependency Updates (maven-surefire-plugin, maven-enforcer-plugin, exec-maven-plugin).
  • NEW
     TeX/LaTeX formula support in chart titles, axis titles, tick labels, and legend entries (#125).
  • NEW
     Smooth curved lines for CategoryChart Line and Area series (#467).
  • NEW
     Theme-instance support in ChartBuilder.
  • NEW
     Online Chart Gallery and xchart-site module published via GitHub Pages.
  • IMPROVED
     All series setters are now fluent (return this).
  • IMPROVED
     Interaction feature flags (tooltips, zoom, cursor) moved from Styler to XChartPanel.
  • IMPROVED
     Auto-skip crowded X-axis labels on CategoryChart (#171).
  • IMPROVED
     Long legend series names are truncated with ellipsis (#686).
  • IMPROVED
     Internal rendering refactored around a new AxesChart abstraction and series data layer.
  • FIXED
     NullPointerException when using BitmapEncoder with tooltips/zoom enabled (#862).
  • FIXED
     Cursor label showing wrong/stale value (#805).
  • FIXED
     BoxChart crashes with empty or single-value data (#890, #891).
  • FIXED
     Doji candle now renders as a horizontal cross (#781).
  • FIXED
     Tooltip not appearing after component resize.
  • FIXED
     Series map is now returned as an unmodifiable view (#739).


4.0.0
Released on May 20th, 2026

  • NOTE
     Minimum Java version raised from 8 to 11.
  • NEW
     Merged / visually-grouped Y-Axes: multiple Y-axis groups can share a single visible axis line with independent scales and colocated slave tick labels (mergeYAxisGroups).
  • NEW
     OHLCChart zoom support — drag to zoom, reset via button, double-click, or Esc key (#770).
  • FIXED
     Esc key now resets zoom in XYChart and OHLCChart (#930).
  • FIXED
     Custom X-axis tick label formatter no longer drops ticks when the formatter returns duplicate label strings (#792).
  • FIXED
     UI freeze when chart window is resized to a very narrow width (#886).
  • IMPROVED
     Axis internals split into Axis_ / Axis_X / Axis_Y for cleaner separation of concerns.
  • NOTE
     Dependency updates: pdfbox-graphics2d, assertj-core 3.27.7 (CVE-2026-24400 XXE fix), build plugin modernisation.


3.9.0
Released on May 17th, 2026

  • NEW
     Horizontal Bar charts.
  • FIXED
     Minor bugs.
  • NOTE
     Updated dependencies.


3.8.8
Released on May 10th, 2024

  • FIXED
     Minor bugs.


3.8.7
Released on January 5th, 2024

  • FIXED
     Upgrade de.rototor.pdfbox:graphics2d to 3.0.1.


3.8.6
Released on November 30th, 2023

  • NOTE
     Updated dependencies.


3.8.5
Released on July 30th, 2023

  • FIXED
     Minor bugs.


3.8.4
Released on June 11th, 2023

  • FIXED
     Minor bugs.


3.8.3
Released on December 25th, 2022

  • FIXED
     Minor bugs.


3.8.2
Released on September 25th, 2022

  • FIXED
     Minor bugs.


3.8.1
Released on August 9th, 2021

  • NOTE
     Migrated to Github Actions CI.
  • FIXED
     Tooltips memory leak
  • FIXED
     Minor bugs.


3.8.0
Released on December 29th, 2020

  • NOTE
     Brought back LegendPosition enum.
  • IMPROVED
     Refactored and documented chart annotations.
  • IMPROVED
     Refactored and documented custom axes tick labels.
  • IMPROVED Refactored and documented chart zoom.
  • IMPROVED Refactored and documented cursor.
  • FIXED
     Tick labels written off edge of chart.
  • FIXED
     Date axis tick labels generator code.


3.7.0
Released on December 23rd, 2020

  • FIXED
     NaN in series data bug.
  • FIXED
     Min/Max axis bug.
  • NEW
     Add Automatic-Module-Name to Jar MANIFEST.
  • IMPROVED
     Internal Zoom code.
  • IMPROVED
     Internal InfoPanel code.
  • IMPROVED
     Internal Tool tips code.
  • IMPROVED
     More examples in README.
  • IMPROVED
     Update VectorGraphics2D dependency.


3.6.6
Released on November 19th, 2020

  • FIXED
     Bar chart Y-Axis tick calc.
  • FIXED
     Axis spacing and calculating.
  • IMPROVED
     Added several null checks.


3.6.5
Released on August 1st, 2020

  • FIXED
     Tooltips for real-time charts.
  • FIXED
     Alpha channel bitmap export.
  • IMPROVED
     Chart data export file chooser.


3.6.4
Released on June 28th, 2020

  • FIXED
     Dial chart rendering.
  • IMPROVED
     Candle charts.
  • IMPROVED
     Tick mark calculations.
  • FIXED
     Logarithmic ticks scaling.
  • NEW
     JavaFX demo.


3.6.3
Released on April 26th, 2020

  • NEW
     Heat Maps.
  • FIXED
     Tooltips rendering.
  • IMPROVED
     XChartDemo auto populate.
  • IMPROVED
     Custom tooltips.
  • FIXED
     disappearing Y-Axes ticks.


3.6.2
Released on March 17th, 2020

  • NEW
     Save real-time chart as GIF.
  • FIXED
     OHLC Charts.
  • IMPROVED
     README.
  • FIXED
     Numerous bugs.
  • FIXED
     Box Charts.
  • FIXED
     Annotation Positioning.
  • FIXED
     Histogram Annotations.


3.6.1
Released on January 11th, 2020

  • NEW
     Box Chart.
  • FIXED
     Chart zooming.
  • FIXED
     “Ghosting” on Windows.
  • IMPROVED
     PDF rendering dependency (PDFBox).
  • FIXED
     Numerous bugs.
  • NEW
     Smooth curves.


3.6.0
Released on October 12th, 2019

  • NOTE
     Bumped minimum JRE to 1.8.
  • NEW
     Chart zooming.
  • NEW
     Custom chart parts.
  • NEW
     Sum format attribute for pie charts.
  • NEW
     Annotation font color.
  • IMPROVED
     Writing to OutputStream.


3.5.4
Released on February 14th, 2019

  • FIXED
     Decimal Formatting Bug introduced in 3.5.3.
  • IMPROVED
     Edge case bug fixes.


3.5.3
Released on February 8th, 2019

  • NEW
     Customizable sum text for pie chart.
  • NEW
     Custom tool tips.
  • FIXED
     Automatic Y-Axis adding/removal when updating chart.
  • IMPROVED
     Pie chart rendering.


3.5.2
Released on May 3rd, 2018

  • NEW
     Trapezoid Marker Type.
  • NEW
     Oval Marker Type.
  • NEW
     Rectangle Marker Type.
  • IMPROVED
     Update VectorGraphics2D dependency.


3.5.1
Released on March 5th, 2018

  • NEW
     OHLC Chart.
  • NEW
     Step and StepArea Series Render Type.
  • NEW
     Cross Marker Type.
  • IMPROVED
     Custom Labels for Series in Legend.
  • FIXED
     NaN comparison logic.
  • FIXED
     Chart Export Directory Selection.
  • FIXED
     Min Max Chart Clipping Issue.


3.5.0
Released on August 2nd, 2017

  • NEW
     Dial Chart.
  • NEW
     Radar Chart.
  • IMPROVED
     Numerical chart render speed.
  • IMPROVED
     Additional speed optimizations.


3.4.0
Released on July 4th, 2017

  • NEW
     Multiple Y Axes.
  • IMPROVED
     Alignment options for X-axis labels.
  • FIXED
     Fill color for area charts.
  • NEW
     Convenience methods for plotting float arrays.
  • FIXED
     CSV exporter.
  • IMPROVED
     SwingWrapper closing.


3.3.1
Released on May 20th, 2017

  • NEW
     Tool tips when mouse over data points.
  • NEW
     Save chart matrices at bitmap or vector.
  • NEW
     Display sum in center pf pie chart.
  • FIXED
     Crash related to all series being disabled.
  • FIXED
     Legend border rendering issue.
  • IMPROVED
     Code cleanup using code inspection tool.


3.3.0
Released on April 14th, 2017

  • NEW
     Stepped Bar type.
  • NEW
     Additional method for OutputStream.
  • NEW
     Enable/Disable series in legend.
  • FIXED
     Plot surface dashed line rendering.


3.2.2
Released on November 24th, 2016

  • IMPROVED
     Hanndling of really tiny and really big numbers.
  • FIXED
     Bug in category charts.


3.2.1
Released on October 13th, 2016

  • IMPROVED
     README.
  • NEW
     Stacked bar charts
  • NEW
     Swingworker Real-time chart example
  • NEW
     Custom theme example


3.2.0
Released on July 27th, 2016

  • IMPROVED
     README.
  • IMPROVED
     Real-time API and demos.
  • FIXED
     Numerical axis ticks algorithm.
  • FIXED
     Diverse minor bugs.
  • NEW
     Real-time for all chart types.
  • IMPROVED
     CSV import and export.
  • NEW
     Right-click Export…


3.1.0
Released on June 13th, 2016

  • IMPROVED
     Pie chart for all annotations option.
  • NEW
     Value annotations above/below bars.
  • NEW
     Donut charts.
  • NEW
     Bubble charts.
  • NOTE
     Updated VectorGraphics2D optional dependency.


3.0.4
Released on May 13th, 2016

  • FIXED
     Axes labels/ticks not properly aligned on bar charts.
  • NOTE
     Updated VectorGraphics2D optional dependency.


3.0.3
Released on March 29th, 2016

  • NOTE
     Class name changes, code changes necessary!
  • FIXED
     NPE when hiding axis ticks.
  • FIXED
     NPE when plotting small numbers.
  • FIXED
     Close outputs in finally block.
  • IMPROVED
     Class visibility.
  • NEW
     Return styler object after setting style for chaining.
  • IMPROVED
     Generics updated everywhere.
  • IMPROVED
     Class names – no more underscores.
  • NEW
     Setting of line width.


3.0.2
Released on February 27th, 2016

  • FIXED
     Generics.
  • FIXED
     Stick chart rendering bug.
  • IMPROVED
     Chart-level marker visibility control.


3.0.1
Released on February 4th, 2016

  • FIXED
     Series hide in legend logic.


3.0.0
Released on January 27th, 2016

  • NOTE
     Major API changes, code changes necessary.
  • NEW
     Pie charts.
  • NEW
     Enable custom series color palettes.
  • NEW
     Allow removing series from chart.
  • NEW
     Allow showing horizontal and vertical plot lines independently.
  • NEW
     Stick series rendering style.
  • NEW
     Allow excluding certain series from legend.
  • IMPROVED
     Better mixed series rendering handling.


2.6.1
Released on December 1st, 2015

  • IMPROVED
     Update VectorGraphics2D Dependency.


2.6.0
Released on October 7th, 2015

  • NOTE
     Changed namespace from com.xeiam to org.knowm.
  • NOTE
     Changed Collection to List for Series data.
  • NOTE
     Dependency Updates.
  • IMPROVED
     Legend rendering efficiency.
  • IMPROVED
     Axis rendering efficiency.
  • IMPROVED
     Date axis automatic tick label formatting.
  • IMPROVED
     Tick label layout so labels never overlap.
  • FIXED
     Bar chart X-Axis rendering for category count over 12.


2.5.1
Released on September 28th, 2015

  • IMPROVED
     Series data validation.
  • FIXED
     PDF and EPS export bug.
  • FIXED
     NPE exception for some logarithmic axes.
  • FIXED
     Live charts with different size series data.
  • FIXED
     Live charts ConcurrentModificationException.


2.5.0
Released on April 14th, 2015

  • NEW
     X-Axis tick label rotation.
  • IMPROVED
     Building with Java 8 DocLint error suppression.
  • FIXED
     Histogram bug.
  • FIXED
     JPEG save on some systems failed.
  • FIXED
     Save dialog box not allowing directories on some systems.


2.4.3
Released on January 9th, 2015

  • NEW
     Allow error bars to match series color.
  • NEW
     Allow error bars on bar charts.
  • FIXED
     Decimal formatter (again).


2.4.2
Released on October 30th, 2014

  • FIXED
     Missing Title and Legend on Bar charts.


2.4.1
Released on October 10th, 2014

  • NEW
     Line and Area combo plots.
  • NEW
     Text alignment option for axis labels.
  • IMPROVED
     Bar chart fill or outline styling.
  • IMPROVED
     Formatting of X and Y axes independently.
  • FIXED
     Clipping bug when saving charts as bitmap.
  • FIXED
     Decimal formatter on bar charts.
  • FIXED
     An infinite loop bug when resizing chart view.
  • FIXED
     Some ClassCastException bugs.


2.4.0
Released on July 3rd, 2014

  • NEW
     GIF, BMP and SVG export.
  • NEW
     Real-time updates of error bars.
  • IMPROVED
     Moved marker size to style manager.
  • IMPROVED
     Legend rendering code.
  • IMPROVED
     Precision of rendering by using doubles over ints.
  • IMPROVED
     Added more tick marks and labels towards edge of plots.
  • IMPROVED
     Decimal formatter.
  • IMPROVED
     Throw informative exception for String axis values in non-bar charts.
  • FIXED
     Histogram code.
  • FIXED
     Number formatter used where date formatter was incorrectly used.
  • FIXED
     CSV importer bug.


2.3.0
Released on January 11th, 2014

  • NEW
     Histogram charts.
  • NEW
     Create series with int arrays.
  • NEW
     Bar charts with more than 12 categories will get some values pruned.
  • NEW
     Bar thickness style added to style manager.
  • NEW
     Bar overlap style added to style manager.
  • IMPROVED
     Precision of rendering by using doubles over ints in many places.
  • IMPROVED
     Force bar chart series to all have exact same x-axis data.
  • FIXED
     Chart title and legend invisible under Java 7.
  • FIXED
     Error bars.
  • FIXED
     Occasional missing logarithmic axis label.
  • FIXED
     Some axis tick labels that should be ‘0’ were looking like 2e-17 instead.


2.3.1
Released on February 27th, 2014

  • FIXED
     X-Axis wrong order for bar charts.
  • FIXED
     Certain decade axis tick labels missing.
  • FIXED
     Drawing plot out of bounds when min or max set manually.


2.3.0
Released on January 11th, 2014

  • NEW
     Real-time charts.
  • NEW
     Render new lines in legend items.
  • IMPROVED
     Purged BigDecimal from core code in favor of double.
  • IMPROVED
     Series’ data generics. Now can pass in List, etc.
  • FIXED
     Chart constructor for custom Themes.


2.2.1
Released on July 10th, 2013

  • NEW
     Legend series line length customizable.
  • NEW
     CSV import/export with error bars.
  • NEW
     Legend position: North.
  • FIXED
     Crash when Chart in Swing frame sized really small.
  • NOTE
     Changed error bar line weight.


2.2.0
Released on May 26th, 2013

  • NEW
     Import and Export Series Data from CSV files.
  • NEW
     MATLAB Theme.
  • NEW
     Saving charts in high resolution.
  • NEW
     Null Y-Axis values allowed.
  • IMPROVED
     Cleaned up marker rendering.
  • IMPROVED
     General API clean up and restructure.
  • IMPROVED
     JavaDocs.
  • IMPROVED
     Rendering uses double precision positioning.
  • FIXED
     Custom min and max for logarithmic charts.
  • FIXED
     Error bars on logarithmic charts.


2.1.0
Released on March 9th, 2013

  • NEW
     Localization of “Save As…” text.
  • FIXED
     Bar chart rendering error.
  • FIXED
     Set X-Axis minimum bug.
  • FIXED
     Set Logarithmic min. and max. bug.


2.0.0
Released on March 5th, 2013

  • NEW
     Scatter charts.
  • NEW
     Area charts.
  • NEW
     Bar charts.
  • NEW
     Logarithmic axes.
  • NEW
     Date and category X-Axis.
  • NEW
     Themes.
  • NEW
     GGPlot2 theme.
  • NEW
     Right-click, Save-As…
  • NEW
     User-defined axes range.
  • NEW
     Custom legend placement.
  • NEW
     Style manager.
  • IMPROVED
     Default Date formatting.
  • IMPROVED
     Chart title horizonatal positioning.
  • IMPROVED
     Internal package structure.
  • IMPROVED
     Hid more internal code from client.
  • IMPROVED
     Chart title horizontal positioning.
  • FIXED
     Legend vertical positioning.
  • NOTE
     Extensive API changes. Will break existing client code.


1.3.1
Released on January 31st, 2013

  • NEW
     ChartBuilder.
  • FIXED
     NullPointerException with Large Number of Series.


1.3.0
Released on January 15th, 2013

  • NEW
     Demo Swing application showing all example charts.
  • IMPROVED
     Increased default line thickness.
  • IMPROVED
     Cleaned up line color, style and marker code.
  • IMPROVED
     Intelligent Date formatting based on time scale.
  • FIXED
     Number formatting with accompanying unit tests.


1.2.1
Released on January 8th, 2013

  • NEW
     Deployed jar to Maven Central.
  • IMPROVED
     Axis tick label spacing optimized.
  • IMPROVED
     Number formatting optimized.
  • FIXED
     Empty String Exception in AxisTitle fixed.
  • FIXED
     Attempted to fix Y-Axis label Heisenbug.


1.2.0
Released on September 22nd, 2012

  • NEW
     Charts can be saved as JPEGs.
  • NEW
     Color can be set for Chart background, Plot foreground, Plot gridlines, Legend background.
  • NEW
     Font (including color) can be set for Chart, Title, Legend, Axis Titles, and Axis Tick Labels.
  • NEW
     Charts can be passed a Locale.
  • NEW
     Charts can be passed a Date and Number pattern for formatting.
  • IMPROVED
     Charts can be resized when embedded in a Swing app.
  • NEW
     Visibility (On/Off) can be set for Axis Ticks, Tick Labels and Titles, and Plot grid lines.
  • NEW
     Charts can be created with Date X-axis data.
  • NEW
     New overloaded addSeries() method for just passing in y-values.
  • REMOVED
     Removed deprecated code.
  • FIXED
     Chart padding calculations.
  • NOTE
     API package structure rearranged – will break existing code!


1.1.0
Released on August 25th, 2012

  • NEW
     Chart series can be passed error bar data.
  • IMPROVED
     Chart series can be passed a Collection of Numbers for data series.
  • IMPROVED
     Chart matrix plots can be passed a Collection of Charts.
  • IMPROVED
     Saving a chart as a PNG doesn’t require a dependency on servlet-api.jar.
  • IMPROVED
     XChart project mavenized.


1.0.2
Released on July 30th, 2011

  • NEW
     Rendering of series line and label is skipped at Double.NaN values.
  • IMPROVED
     Gracefully exit with descriptive message when X-axis and Y-axis lengths differ.
  • FIXED
     Axis label rendering bug for some horizontal and vertical lines.


1.0.1
Released on July 28th, 2011

  • FIXED
     Y-axis scaling bug when all values were negative.


1.0.0
Released on July 25th, 2011

  • NEW
     Initial Release!