// Create a new workbook Workbook workbook = new Workbook(); IWorksheet worksheet = workbook.getWorksheets().get(0); worksheet.getRange("C2:E4").setValue(new Object[][]{ {"aa", "bb", "aa1"}, {"ccc", "dddd", "dddd1"}, {"ff", "ffff", "ffff1"} }); //create text length validation, text length between 2 and 3. worksheet.getRange("C2:E4").getValidation().add(ValidationType.TextLength, ValidationAlertStyle.Stop, ValidationOperator.Between, 2, 3); //judge if Range["C2:E4"] has validation. for (int i = 1; i <= 3; i++) { for (int j = 2; j <= 4; j++) { if (worksheet.getRange(i, j).getHasValidation()) { //set the range[i, j]'s interior color. worksheet.getRange(i, j).getInterior().setColor(Color.GetLightBlue()); } } } // Save to an excel file workbook.save("CreateTextLength.xlsx");