Parsing LocalDate to ZonedDateTime in correct format

Question

Given:

public static void main(String[] args) {

   String dateString = "2018-07-30T13:36:17.820";

    DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter
            .ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS");

    LocalDate date = LocalDate.parse(dateString, DATE_TIME_FORMATTER);

    ZonedDateTime zonedDateTime = date.atStartOfDay((ZoneOffset.UTC));

    System.out.println(zonedDateTime);
}

And output:

2018-07-30T00:00Z

...what is the pattern to print seconds? Stupid question no doubt but driving me a little nuts

I need:

2018-07-30T00:00:00Z

Answer 1

I changed java.time.LocalDate to java.time.LocalDateTime, you need it if you want to show also the seconds.

package com.test;

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

public class DateFormatter {

    public static void main(String[] args) {

        String dateString = "2018-07-30T13:36:17.820";

        DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter
                .ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS");

        LocalDateTime date = LocalDateTime.parse(dateString, DATE_TIME_FORMATTER);

        ZonedDateTime zonedDateTime = date.atZone(ZoneOffset.UTC);


        System.out.println(zonedDateTime);
    }
}

Output is:

2018-07-30T13:36:17.820Z