I have been using the same line of code for a few months now to generate a word document that includes XWPF and XDDF charts and suddenly it does not work. Here is an exaple that I tried that was on stackFlow that appeared to work for many people except for me:


  private static void setBarData(XWPFChart chart, String chartTitle, String[] series, String[] categories, Double[] values1, Double[] values2) {
        // Use a category axis for the bottom axis.
        XDDFChartAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
        bottomAxis.setTitle(chartTitle);
        XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
        leftAxis.setTitle(",");
        leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
        leftAxis.setMajorTickMark(AxisTickMark.OUT);
        leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);

        final int numOfPoints = categories.length;
        final String categoryDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, COLUMN_LANGUAGES, COLUMN_LANGUAGES));
        final String valuesDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, COLUMN_COUNTRIES, COLUMN_COUNTRIES));
        final XDDFDataSource<?> categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange, COLUMN_LANGUAGES);
        final XDDFNumericalDataSource<? extends Number> valuesData = XDDFDataSourcesFactory.fromArray(values1, valuesDataRange, COLUMN_COUNTRIES);
        valuesData.setFormatCode("General");
        values1[6] = 16.0; // if you ever want to change the underlying data, it has to be done before building the data source


        XDDFBarChartData bar = (XDDFBarChartData) chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);

        XDDFBarChartData.Series series1 = (XDDFBarChartData.Series) bar.addSeries(categoriesData, valuesData);
        series1.setTitle(chartTitle);


        bar.setVaryColors(true);
        bar.setBarDirection(BarDirection.COL);
        chart.plot(bar);

        XDDFChartLegend legend = chart.getOrAddLegend();
        legend.setPosition(LegendPosition.LEFT);
        legend.setOverlay(false);

        chart.setTitleText(chartTitle);
        chart.setTitleOverlay(false);
        chart.setAutoTitleDeleted(false);
    }