Outputs this date-time as a {@code string}, such as {@code 2007-12-03T10:15:30+01:00}.
!(p)
The output will be one of the following ISO-8601 formats:
!(ul)
!(li){@code uuuu-MM-dd'T'HH:mmXXXXX}</li>
!(li){@code uuuu-MM-dd'T'HH:mm:ssXXXXX}</li>
!(li){@code uuuu-MM-dd'T'HH:mm:ss.SSSXXXXX}</li>
!(li){@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSXXXXX}</li>
!(li){@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSSXXXXX}</li>
</ul>
The format used will be the shortest that outputs the full value of
the time where the omitted parts are implied to be zero.
@return a string representation of this date-time, not null
Outputs this date-time as a {@code string}, such as {@code 2007-12-03T10:15:30+01:00}. !(p) The output will be one of the following ISO-8601 formats: !(ul) !(li){@code uuuu-MM-dd'T'HH:mmXXXXX}</li> !(li){@code uuuu-MM-dd'T'HH:mm:ssXXXXX}</li> !(li){@code uuuu-MM-dd'T'HH:mm:ss.SSSXXXXX}</li> !(li){@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSXXXXX}</li> !(li){@code uuuu-MM-dd'T'HH:mm:ss.SSSSSSSSSXXXXX}</li> </ul> The format used will be the shortest that outputs the full value of the time where the omitted parts are implied to be zero.
@return a string representation of this date-time, not null