Polygons are used to display information in Area Charts. There are three different types:

Normal

Normal Area charts create polygons based on the data. They use DateTimeXAxis or IndexedXAxis as the XAxis based on the series and NumericYAxis as the YAxis.

                                      Figure 1 - Normal Area Chart

[Java]
   // Create a PDF Document
   Document document = new Document();
   // Create a Page and add it to the document
   Page page = new Page();
   document.getPages().add(page);
        
   // Create a chart
   Chart chart = new Chart(0, 0, 400, 230);
   // Create a plot area
   PlotArea plotArea = chart.getPrimaryPlotArea();
        
   // Create header titles and add it to the chart
   Title title1 = new Title("Website Visitors");
   Title title2 = new Title("Year - 2007");
   chart.getHeaderTitles().add(title1);
   chart.getHeaderTitles().add(title2);
   
   AutoGradient myAutogradient1 = new AutoGradient(90.0f, CmykColor.getRed(), CmykColor.getIndianRed())     
   // Create indexed area series and add values to it
   
   IndexedAreaSeries areaSeries1 = new IndexedAreaSeries("Website A", , , myAutogradient1);
   areaSeries1.getValues().add(new float[]{5, 7, 9, 6});
       
   // Add indexed area series to the plot area
   plotArea.getSeries().add(areaSeries1);
        
   // Create a title and add it to the YAxis
   Title lTitle = new Title("Visitors (in millions)");
   areaSeries1.getYAxis().getTitles().add(lTitle);
        
   //Adding AxisLabels to the XAxis
   areaSeries1.getXAxis().getLabels().add(new IndexedXAxisLabel("Q1", 0));
   areaSeries1.getXAxis().getLabels().add(new IndexedXAxisLabel("Q2", 1));
   areaSeries1.getXAxis().getLabels().add(new IndexedXAxisLabel("Q3", 2));
   areaSeries1.getXAxis().getLabels().add(new IndexedXAxisLabel("Q4", 3));
        
   // Add the chart to the page
   page.getElements().add(chart);
   // Save the PDF
   document.draw("[PhysicalPath]/MyDocument.pdf");

Stacked

Stacked charts display related data, one on top of the other. They use DateTimeXAxis or IndexedXAxis as the XAxis based on the series and NumericYAxis as the YAxis.

                                Figure 2 - Stacked Area Chart

[Java]
   // Create a PDF Document
   Document document = new Document();
   // Create a Page and add it to the document
   Page page = new Page();
   document.getPages().add(page);
        
   // Create a chart
   Chart chart = new Chart(0, 0, 400, 230);
   // Create a plot area
   PlotArea plotArea = chart.getPrimaryPlotArea();
        
   // Create header titles and add it to the chart
   Title title1 = new Title("Website Visitors");
   Title title2 = new Title("Year - 2007");
   chart.getHeaderTitles().add(title1);
   chart.getHeaderTitles().add(title2);

   AutoGradient myAutogradient1 = new AutoGradient(90.0f, CmykColor.getRed(), CmykColor.getIndianRed()) 
   AutoGradient myAutogradient2 = new AutoGradient(90.0f, CmykColor.getGreen(), CmykColor.getYellowGreen())
   AutoGradient myAutogradient3 = new AutoGradient(120.0f, CmykColor.getBlue(), CmykColor.getLightBlue())
   // Create indexed stacked area series elements and add values to it
   IndexedStackedAreaSeriesElement seriesElement1 = new IndexedStackedAreaSeriesElement("Website A", myAutogradient1);
   seriesElement1.getValues().add(new float[] { 5, 7, 9, 6 });
   IndexedStackedAreaSeriesElement seriesElement2 = new IndexedStackedAreaSeriesElement("Website B", myAutogradient2);
   seriesElement2.getValues().add(new float[] { 4, 2, 5, 8 });
   IndexedStackedAreaSeriesElement seriesElement3 = new IndexedStackedAreaSeriesElement("Website C", myAutogradient3);
   seriesElement3.getValues().add(new float[] { 2, 4, 6, 9 });
        
   // Create a Indexed Stacked Area Series
   IndexedStackedAreaSeries areaSeries = new IndexedStackedAreaSeries();
        
   // Add indexed stacked area series elements to the Indexed Stacked Area Series
   areaSeries.add(seriesElement1);
   areaSeries.add(seriesElement2);
   areaSeries.add(seriesElement3);
        
   // Add series to the plot area
   plotArea.getSeries().add(areaSeries);
        
   // Create a title and add it to the YAxis
   Title lTitle = new Title("Visitors (in millions)");
   areaSeries.getYAxis().getTitles().add(lTitle);
        
   //Adding AxisLabels to the XAxis
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q1", 0));
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q2", 1));
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q3", 2));
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q4", 3));
        
   // Add the chart to the page
   page.getElements().add(chart);
   // Save the PDF
   document.draw("[PhysicalPath]/MyDocument.pdf");

100% Stacked

100% stacked charts are similar to stacked charts, but here the data is expressed as a percentage. They use DateTimeXAxis or IndexedXAxis as the XAxis based on the series and PercentageYAxis as the YAxis.

                            Figure 3 - Stacked 100% Area Chart

[Java]
   // Create a PDF Document
   Document document = new Document();
   // Create a Page and add it to the document
   Page page = new Page();
   document.getPages().add(page);
        
   // Create a chart
   Chart chart = new Chart(0, 0, 400, 230);
   // Create a plot area
   PlotArea plotArea = chart.getPrimaryPlotArea();
        
   // Create header titles and add it to the chart
   Title title1 = new Title("Website Visitors");
   Title title2 = new Title("Year - 2007");
   chart.getHeaderTitles().add(title1);
   chart.getHeaderTitles().add(title2);

   AutoGradient myAutogradient1 = new AutoGradient(90.0, CmykColor.getRed(), CmykColor.getIndianRed()) 
   AutoGradient myAutogradient2 = new AutoGradient(90.0F, CmykColor.getGreen(), CmykColor.getYellowGreen())
   AutoGradient myAutogradient3 = new AutoGradient(120.0F, CmykColor.getBlue(), CmykColor.getLightBlue())
   // Create a indexed 100% stacked area series elements and add values to it
   Indexed100PercentStackedAreaSeriesElement seriesElement1 = new Indexed100PercentStackedAreaSeriesElement("Website A", myAutogradient1);
   seriesElement1.getValues().add(new float[] { 5, 7, 9, 6 });
   Indexed100PercentStackedAreaSeriesElement seriesElement2 = new Indexed100PercentStackedAreaSeriesElement("Website B", myAutogradient2);
   seriesElement2.getValues().add(new float[] { 4, 2, 5, 8 });
   Indexed100PercentStackedAreaSeriesElement seriesElement3 = new Indexed100PercentStackedAreaSeriesElement("Website C", myAutogradient3);
   seriesElement3.getValues().add(new float[] { 2, 4, 6, 9 });
        
   // Create a Indexed 100% Stacked Area Series
   Indexed100PercentStackedAreaSeries areaSeries = new Indexed100PercentStackedAreaSeries();
        
   // Add indexed 100% stacked area series elements to the Indexed 100% Stacked Area Series
   areaSeries.add(seriesElement1);
   areaSeries.add(seriesElement2);
   areaSeries.add(seriesElement3);
        
   // Add series to the plot area
   plotArea.getSeries().add(areaSeries);
        
   // Create a title and add it to the yAxis
   Title lTitle = new Title("Visitors (in millions)");
   areaSeries.getYAxis().getTitles().add(lTitle);
        
   //Adding AxisLabels to the XAxis
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q1", 0));
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q2", 1));
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q3", 2));
   areaSeries.getXAxis().getLabels().add(new IndexedXAxisLabel("Q4", 3));
        
   // Add the chart to the page
   page.getElements().add(chart);
   // Save the PDF
   document.draw("[PhysicalPath]/MyDocument.pdf");