@Override
public String toString ()

Implementing: java.time.chrono.ChronoLocalDateTime

Outputs this date-time as a String, such as 2007-12-03T10:15:30.

The output will be one of the following ISO-8601 formats:

• uuuu-MM-dd'T'HH:mm
• uuuu-MM-dd'T'HH:mm:ss
• uuuu-MM-dd'T'HH:mm:ss.SSS
• uuuu-MM-dd'T'HH:mm:ss.SSSSSS
• uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSS

The format used will be the shortest that outputs the full value of the time where the omitted parts are implied to be zero.

Returns:  a string representation of this date-time, not null