Luis Marcelo Santos :
I upgraded to:
DateTimeFormatter dtf = DateTimeFormatter.ofPattern ("dd/MM/yyyy HH:mm:ss");
org.threeten.bp.LocalDateTime _date = org.threeten.bp.LocalDateTime.parse ("10/19/2020 18:00:47", dtf);
and get: 2020-10-19T18:00:47 but I still don't have an exit with the standard: 2020-10-19T18:00:47.868-03:00
user3197884 :
Your DateTimeFormatter has ("dd/MM/yyyy HH:mm:ss") but you have used "10/19/2020 18:00:47". Month cannot be 19.
Change your input to "19/10/2020 18:00:47" and it should work.
org.threeten.bp.format.DateTimeFormatter dtf = org.threeten.bp.format.DateTimeFormatter.ofPattern ("dd/MM/yyyy HH:mm:ss");
org.threeten.bp.LocalDateTime _date = org.threeten.bp.LocalDateTime.parse("19/10/2020 18:00:47", dtf);
System.out.println(_date);