无法从 HH:mm:ss.SSS'Z' 转换为 HH:MM 格式的 Java

Question

I'm trying to convert into HH:MM format in Java

Here is my code

String date = "18:30:00.000Z";

    try {
        ZonedDateTime parsed = ZonedDateTime.parse(date);

        ZonedDateTime z = parsed.withZoneSameInstant(ZoneId.systemDefault());

        DateTimeFormatter fmt = DateTimeFormatter.ofPattern("hh:mm a", Locale.ENGLISH);
        System.out.println(fmt.format(z));
    } catch(Exception e) {
        e.printStackTrace();
    }

Is there anything wrong in my code

Here is the exception

java.time.format.DateTimeParseException: Text '18:30:00.000Z' could not be parsed at index 0

Answer 1

The string you are trying to parse is not a date and time, but only a time. So the type ZonedDateTime is not the appropriate type to use here. Use OffsetTime instead, which is a class for holding just a time (without a date).

String input = "18:30:00.000Z";
OffsetTime time = OffsetTime.parse(input);
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("h:mm a");
String result = formatter.format(time);
System.out.println(result);

Output:

6:30 PM