Parsing time string in java 8 - Invalid value for ClockHourOfAmPm [duplicate]

Question

I am trying to convert time zones with given time in my properties file.

 package test1;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

public class TimeZoneConversion {

private static final String DATE_FORMAT = "yyyy-MM-dd-hh-mm-ss";

public static void main(String[] args) {

    String ds = "2019-03-18 13-14-48";
    LocalDateTime ldt = LocalDateTime.parse(ds, DateTimeFormatter.ofPattern(DATE_FORMAT));
    System.out.println("ldt : "+ldt);

    ZoneId singaporeZoneId = ZoneId.of("Asia/Singapore");
    System.out.println("TimeZone : " + singaporeZoneId);

    //LocalDateTime + ZoneId = ZonedDateTime
    ZonedDateTime asiaZonedDateTime = ldt.atZone(singaporeZoneId);
    System.out.println("Date (Singapore) : " + asiaZonedDateTime);

    ZoneId newYokZoneId = ZoneId.of("America/New_York");
    System.out.println("TimeZone : " + newYokZoneId);

    ZonedDateTime nyDateTime = asiaZonedDateTime.withZoneSameInstant(newYokZoneId);
    System.out.println("Date (New York) : " + nyDateTime);

    DateTimeFormatter format = DateTimeFormatter.ofPattern(DATE_FORMAT);
    System.out.println("\n---DateTimeFormatter---");
    System.out.println("Date (Singapore) : " + format.format(asiaZonedDateTime));
    System.out.println("Date (New York) : " + format.format(nyDateTime));

}

}

SO I am getting error :

 Exception in thread "main" java.time.format.DateTimeParseException: Text '2019-03-18 13-14-48' could not be parsed: Invalid value for ClockHourOfAmPm (valid values 1 - 12): 13
at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1920)
at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1855)
at java.time.LocalDateTime.parse(LocalDateTime.java:492)
at test1.FirstClass.main(FirstClass.java:20)

I do not have AM/PM value in the date time that I getting from properties file. This value is stored in String ds. in the above code I have hardcoded it. How does it work? How to make it work with the time date format which I have given?

Answer 1

You should change the DATE_FORMAT to:

 private static final String DATE_FORMAT = "yyyy-MM-dd HH-mm-ss";

If you refer the DateTimeFormatter docs you see the description as follows:

H hour-of-day (0-23)

In your case you are supplying the hour as the hour-of-day (HH) instead of in clock-hour-of-am-pm (hh a) format from your properties file. And as 13 ( > 12) is not an acceptable value for clock-hour-of-am-pm without the AM/PM you are getting an exception.

If you want it in clock-hour-of-am-pm you need to change the format to:

private static final String DATE_FORMAT = "yyyy-MM-dd hh-mm-ss a";

And also add the AM/PM information in the date string:

String ds = "2019-03-18 12-14-48 AM";