Why does this date parsing fail?

Question

I'm trying to convert a string into a LocalDateTime object.

@Test
public void testDateFormat() {
   String date = "20171205014657111";
   DateTimeFormatter formatter = 
       DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS");
   LocalDateTime dt = LocalDateTime.parse(date, formatter);
}

I would expect this test to pass.

I get the following error:

java.time.format.DateTimeParseException: Text '20171205014657111' could not be parsed at index 0

Works fine on my machine: `dt = 2017-12-05T01:46:57.111` – Nir Alfasi Dec 05 '17 at 02:20 — Nir Alfasi, Dec 05 '17 at 02:20
@alfasin which jvm version are you running? – user4184113 Dec 05 '17 at 02:33 — user4184113, Dec 05 '17 at 02:33
Works fine here. What timezone are you in? – Elliott Frisch Dec 05 '17 at 02:34 — Elliott Frisch, Dec 05 '17 at 02:34
Timezone shouldn't make a difference - it's LocalDateTime. – Dawood ibn Kareem Dec 05 '17 at 02:35 — Dawood ibn Kareem, Dec 05 '17 at 02:35

score 17 · Answer 1 · edited Dec 05 '17 at 02:42

17

Looks like I may have run across this bug: https://bugs.openjdk.java.net/browse/JDK-8031085 as it corresponds to the JVM version I'm using. The workaround in the comments fixes the issue for me:

@Test
public void testDateFormat() {
    String date = "20171205014657111";
    DateTimeFormatter dtf = new DateTimeFormatterBuilder()
       .appendPattern("yyyyMMddHHmmss")
       .appendValue(ChronoField.MILLI_OF_SECOND, 3).toFormatter();
    LocalDateTime dt = LocalDateTime.parse(date, dtf);
}

edited Dec 05 '17 at 02:42

OneCricketeer

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answered Dec 05 '17 at 02:37

user4184113

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Oh, wow, that's disappointing. I wonder why they're deferring it to 9, instead of fixing it in the next build of 8. – Dawood ibn Kareem Dec 05 '17 at 02:44

Why does this date parsing fail?

1 Answers1