DateTimeExample

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;

public class Main {

    public static void main(String[] args) {
        String dateStr1 = "2019-01-30T12:04:12.734Z";
        String dateStr2 = "2019-01-30T12:04:12.21Z";

        DateTimeFormatter formatter = new DateTimeFormatterBuilder()
                .append(DateTimeFormatter.ISO_LOCAL_DATE)
                .appendLiteral('T')
                .append(DateTimeFormatter.ISO_LOCAL_TIME)
                .appendLiteral('Z')
                .toFormatter();
        String dateTimeString = "2018-04-18T15:27:10.77Z";
        LocalDateTime dateTime = LocalDateTime.parse(dateTimeString, formatter);
        System.out.println(dateTime);

        dateTime = LocalDateTime.parse(dateStr1, formatter);
        System.out.println(dateTime);

        dateTime = LocalDateTime.parse(dateStr2, formatter);
        System.out.println(dateTime);
    }
}