Why I get a wrong result when parsing a date from string with SimpleDateFormat ? (Java) [duplicate]

问题

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SimpleDateFormat producing wrong date time when parsing “YYYY-MM-dd HH:mm” (5 answers)

How does Java “week year” really work? (2 answers)

Closed 10 months ago.

I'm trying to parse a date from string but i get a wrong date result and dont understand why :/

String dateStr = "September 6, 2013 - 10:48";
SimpleDateFormat parser = new SimpleDateFormat("MMMM dd, YYYY - HH:mm", Locale.US);
Date date = parser.parse(dateStr);

When I look date result (in debugger) i see : Sun Dec 30 10:48:00 CET 2012 Can someone tell me where I'm wrong please ?

回答1:

        String dateStr = "September 6, 2013 - 10:48";
        SimpleDateFormat parser = new SimpleDateFormat(
                "MMMM dd, yyyy - hh:mm", Locale.US);
        Date date = parser.parse(dateStr);
        System.out.println(date);

Use yyyy and not YYYY

Also don't use Date but use LocalDate and LocalDateTime.

Here is how you would do it using LocalDateTime

        String dateStr = "September 6, 2013 - 10:48";
        DateTimeFormatter format = DateTimeFormatter.ofPattern(
                "MMMM d, y - HH:mm",Locale.US);
        LocalDateTime date = LocalDateTime.parse(dateStr,format);
        System.out.println(date.format(format));

Note the HH is for 24 hour time since you didn't include an AM or PM in your date string.

来源：https://stackoverflow.com/questions/61065816/why-i-get-a-wrong-result-when-parsing-a-date-from-string-with-simpledateformat