package com.opencsv.bean.validators;
   
   import com.opencsv.bean.BeanField;
   import com.opencsv.exceptions.CsvValidationException;
   
   public class MustStartWithACapitalLetter implements StringValidator {
       @Override
       public boolean isValid(String value) {
           return value != null
                  && !value.isEmpty()
                  && Character.isUpperCase(value.charAt(0));
      }
  
      @Override
      public void validate(String value, BeanField field) throws CsvValidationException {
          if (!isValid(value)) {
              throw new CsvValidationException(String.format("For field %s the value must start with a capital letter but instead was \"%s\".", field.getField().getName(), value));
          }
      }
  
      @Override
      public void setParameterString(String value) {
          // not needed.
      }
  
  
  }