// Create a new workbook and access the default worksheet
Workbook workbook = new Workbook();
IWorksheet sheet = workbook.getWorksheets().get(0);

// Conditional formatting on merge cell
sheet.getRange("B2:C4").merge();
sheet.getRange("B2:C4").setValue(123);
IFormatCondition cf = (IFormatCondition) sheet.getRange("B2:C4").getFormatConditions()
.add(FormatConditionType.CellValue, FormatConditionOperator.Greater, 0, 0);
cf.getBorders().setThemeColor(ThemeColor.Accent1);
cf.getBorders().setLineStyle(BorderLineStyle.Thin);

// Set cell values
int[] data = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
sheet.getRange("B10:B19").setValue(data);
sheet.getRange("C10:C19").setValue(data);
sheet.getRange("D10:D19").setValue(data);

// Apply conditional formatting
// Color scale
IColorScale cf1 = sheet.getRange("B10:B19").getFormatConditions()
.addColorScale(ColorScaleType.ThreeColorScale);
cf1.getColorScaleCriteria().get(0).setType(ConditionValueTypes.LowestValue);
cf1.getColorScaleCriteria().get(0).getFormatColor()
.setColor(Color.FromArgb(248, 105, 107));
cf1.getColorScaleCriteria().get(1).setType(ConditionValueTypes.Percentile);
cf1.getColorScaleCriteria().get(1).setValue(50);
cf1.getColorScaleCriteria().get(1).getFormatColor()
.setColor(Color.FromArgb(255, 235, 132));
cf1.getColorScaleCriteria().get(2).setType(ConditionValueTypes.HighestValue);
cf1.getColorScaleCriteria().get(2).getFormatColor()
.setColor(Color.FromArgb(99, 190, 123));

// Data bar
sheet.getRange("C14").setValue(-5);
sheet.getRange("C17").setValue(-8);
IDataBar cf2 = sheet.getRange("C10:C19").getFormatConditions().addDatabar();
cf2.getMinPoint().setType(ConditionValueTypes.AutomaticMin);
cf2.getMaxPoint().setType(ConditionValueTypes.AutomaticMax);
cf2.setBarFillType(DataBarFillType.Gradient);
cf2.getBarColor().setColor(Color.FromArgb(0, 138, 239));
cf2.getBarBorder().getColor().setColor(Color.FromArgb(0, 138, 239));
cf2.getNegativeBarFormat().getColor().setColor(Color.FromArgb(255, 0, 0));
cf2.getNegativeBarFormat().setBorderColorType(DataBarNegativeColorType.Color);
cf2.getNegativeBarFormat().getBorderColor().setColor(Color.FromArgb(255, 0, 0));
cf2.getAxisColor().setColor(Color.GetBlack());
cf2.setAxisPosition(DataBarAxisPosition.Automatic);

// Icon set
IIconSetCondition cf3 = sheet.getRange("D10:D19")
.getFormatConditions().addIconSetCondition();
cf3.setIconSet(workbook.getIconSets().get(IconSetType.Icon3Symbols));

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