code: public static String substituteDecimalSeparatorToPeriod(String value)
  	{
  		if (StringUtil.isBlank(value))
  		{
  			return value;
  		}
  
  		int commaPosition = value.lastIndexOf(',');
  
  		if (commaPosition == -1)
  		{
  			return value;
  		}
  
  		return value.substring(0, commaPosition) + "." +
  			   value.substring(commaPosition + 1);
  	}
docs: <p>substituteDecimalSeparatorToPeriod.</p>
  
  @param value a {@link java.lang.String} object.
  @return a {@link java.lang.String} object.