How to create DateTimeformatter with optional seconds arguments

Question

I am trying to create a DateTimeformatter to validate following date times:

String date1 = \"2017-07-06T17:25:28\";
String date2 = \"2017-07-06T         


        

Answer 1

Try set minWidth to 1, i.e. .appendFraction(ChronoField.MICRO_OF_SECOND, 1, 6, true).