java-time

I need to convert a string to LocalTime (java-8 not joda) that may or maynot have nanoOfSeconds in the string. The String format is in the form of 07:06:05 or 07:06:05.123456 The string may or may not have a decimal place in the seconds and when it does there could be any number of characters to represent the Nano Seconds part. Using a DateTimeForamtter such as DateTimeFormatter dtf = DateTimeFormatter.ofPattern("H:mm:ss"); or DateTimeFormatter dtf = DateTimeFormatter.ofPattern("H:mm:ss.SSSSSS"); I can use an IF statement to distinguish between the two formats such as: DateTimeFormatter dtf;

In Instant there are methods: toEpochMilli which converts this instant to the number of milliseconds from the epoch of 1970-01-01T00:00:00Z getEpochSecond which gets the number of seconds from the Java epoch of 1970-01-01T00:00:00Z . Both of these methods lose precision, e.g. in toEpochMilli JavaDoc I see: If this instant has greater than millisecond precision, then the conversion drop any excess precision information as though the amount in nanoseconds was subject to integer division by one million. I don't see corresponding methods to obtain more precise timestamp. How can I get number of

Let's say I want to know how many days are until Christmas with a method that works any day of any year so next Christmas may be this year or next year that I don't know if it is a leap year or not. I might calculate the next Christmas date and then calculate the days from now until then. I can represent Christmas Day as MonthDay.of(12, 25) but I can't find how that helps. I found it is easy to calculate the date of next Monday this way: ZonedDateTime nextMonday = ZonedDateTime.now() .with(TemporalAdjusters.next(DayOfWeek.MONDAY)) .truncatedTo(ChronoUnit.DAYS); But I can't find any

I am trying to parse the following timestamp string 03-feb-2014 13:16:31 using java.time but it is throwing an error. Here is my code. String timestamp = "03-feb-2014 13:16:31"; DateTimeFormatter format; DateTimeFormatterBuilder formatBuilder = new DateTimeFormatterBuilder(); formatBuilder.parseCaseInsensitive(); formatBuilder.append(DateTimeFormatter.ofPattern("dd-MMM-YYYY HH:mm:ss")); format = formatBuilder.toFormatter(); LocalDateTime localdatetime = LocalDateTime.parse(timestamp, format); But I am getting the following error. Exception in thread "main" java.time.format