text: Q:
  
  dateTimeNoMillis() formatter in ISODateTimeFormat
  
  I need to validate a string whether it is in the format ISODateTimeFormat.dateTimeNoMillis().
  final DateTimeFormatter dateHourMinuteSecondFormatter =ISODateTimeFormat.dateTimeNoMillis();
  String s = "2012-W12-12";
  try {
          dateHourMinuteSecondFormatter.parseDateTime(s);
      } catch (IllegalArgumentException e) {
          e.setMessage("exception thrown);
      }
  
  It is supposed to throw the exception as the date is in the wrong format but it is not.
  Is there anything else that I need to add?
  
  A:
  
  No, there's nothing more you need to do.
  I suspect that actually it is throwing the example, but your message diagnostics are incorrect. This certainly fails for me, using Joda Time 2.1:
  import org.joda.time.*;
  import org.joda.time.format.*;
  
  public class Test {
  
      public static void main(String[] args) throws Exception {
          DateTimeFormatter formatter = ISODateTimeFormat.dateTimeNoMillis();
          String s = "2012-W12-12";
          try {
              DateTime dt = formatter.parseDateTime(s);
              System.out.println(dt);
          } catch (IllegalArgumentException e) {
              System.out.println(e);
          }
      }
  }
  
  Output:
  java.lang.IllegalArgumentException: Invalid format: "2012-W12-12" is malformed
  at "W12-12"
  
  