What do T and Z in the time format 2020-01-13T16:00:00.000Z represent and how to deal with them

Reprint
T means delimiter, Z means UTC.
UTC: Universal Standard Time, adding 8 hours to the standard time, that is, the East Eighth District Time, which is Beijing Time.

Example

Beijing time: 2020-01-14 00:00:00 The corresponding international standard time format is: 2020-01-13T16:00:00.000Z

String dateTime = "2020-01-13T16:00:00.000Z";dateTime = dateTime.replace("Z", " UTC");SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS Z");SimpleDateFormat defaultFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");try {Date time = format.parse(dateTime);String result = defaultFormat.format(time);System.out.println(result);} catch (Exception e) {e.printStackTrace();}// Output result: 2020-01-14 00:00:00