// Create a new workbook and access the default worksheet 
Workbook workbook = new Workbook();
Object[][] data = new Object[][] 
{ 
  { "Customer", "0-30 Days", "30-60 Days", "60-90 Days", ">90 Days" },
  { "Customer A", 1200.15, 1916.18, 1105.23, 1806.53 },
  { "Customer B", 896.23, 1005.53, 1800.56, 1150.49 },
  { "Customer C", 827.63, 1009.23, 1869.23, 1002.56 } 
};

IWorksheet worksheet = workbook.getWorksheets().get(0);
worksheet.getRange("B2:E5").setValue(data);
worksheet.getRange("B:F").setColumnWidth(15);
worksheet.getRange("B:E").setHorizontalAlignment(HorizontalAlignment.Center);
ITable table = worksheet.getTables().add(worksheet.getRange("B2:F5"), true);
table.setTableStyle(workbook.getTableStyles().get("TableStyleMedium3"));
table.getColumns().get(4).setName("Sparklines");

// Create a new group of sparklines.
worksheet.getRange("F3").getSparklineGroups().add(SparkType.Line, "C3:E3");
worksheet.getRange("F4").getSparklineGroups().add(SparkType.Column, "C4:E4");
worksheet.getRange("F5").getSparklineGroups()
.add(SparkType.ColumnStacked100, "C5:E5");

// Save to a pdf file
workbook.save("ExportSparklines.pdf", SaveFileFormat.Pdf);