// Get DfpUser from "~/dfp.properties".
DfpUser user = new DfpUser();
// Get the CustomFieldService.
CustomFieldServiceInterface customFieldService =
user.getService(DfpService.V201311.CUSTOM_FIELD_SERVICE);
// Set the ID of the drop-down custom field to create options for.
Long customFieldId = Long.parseLong("INSERT_DROP_DOWN_CUSTOM_FIELD_ID_HERE");
// Create custom field options.
CustomFieldOption customFieldOption1 = new CustomFieldOption();
customFieldOption1.setDisplayName("Approved");
customFieldOption1.setCustomFieldId(customFieldId);
CustomFieldOption customFieldOption2 = new CustomFieldOption();
customFieldOption2.setDisplayName("Unapproved");
customFieldOption2.setCustomFieldId(customFieldId);
// Add custom field options.
CustomFieldOption[] customFieldOptions =
customFieldService.createCustomFieldOptions(new CustomFieldOption[] {customFieldOption1,
customFieldOption2});
// Display results.
if (customFieldOptions != null) {
for (CustomFieldOption customFieldOption : customFieldOptions) {