How to format 2021-12-17T06:23:49.000000Z?

Question

I want to format this date 2021-12-17T06:23:49.000000Z to read as Dec 17,2021. How do I achieve that?

This is what I have tried:

SimpleDateFormat spf=new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSSSS.'Z'");
Date newDate= null;
try {
    newDate = spf.parse(date);
} catch (ParseException e) {
    e.printStackTrace();
}
spf= new SimpleDateFormat("dd MMM yyyy");
date = spf.format(newDate);

How can `.SSSSSS.'Z'` *parse* `.000000Z`? the pattern has an extra dot between milliseconds and `Z` — user16320675, Dec 19 '21 at 01:34

score 6 · Answer 1 · answered Dec 19 '21 at 00:54

6

The biggest mistake you have here is using the old Date and SimpleDateFormat classes. They are legacy, and have been retained mainly for backwards compatibility. The java.time package provides a far more consistent API. Like,

String date = "2021-12-17T06:23:49.000000Z";
OffsetDateTime inst = OffsetDateTime.ofInstant(Instant.parse(date), 
        ZoneId.systemDefault());
System.out.println(DateTimeFormatter.ofPattern("MMM dd, yyyy").format(inst));

Outputs

Dec 17, 2021

answered Dec 19 '21 at 00:54

Elliott Frisch

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2

Or automatically localize: `DateTimeFormatter.ofLocalizedDate( FormatStyle.MEDIUM ).withLocale( Locale.getDefault() )` – Basil Bourque Dec 19 '21 at 03:09

How to format 2021-12-17T06:23:49.000000Z?

1 Answers1