import java.time.*;
import java.time.format.DateTimeFormatter;
 
public class Main {
    public static void main(String[] args) {
        ZoneId zoneId = ZoneId.of("America/Los_Angeles");
 
        DateTimeFormatter parser = DateTimeFormatter.ofPattern("yy-MM-dd HH:mm:ss.SSS");
        LocalDateTime ldt = LocalDateTime.parse("14-05-29 17:42:20.123", parser);
 
        ZonedDateTime zdt = ldt.atZone(zoneId);
        System.out.println(zdt);
 
        // Alternatively (not my favourite),
        DateTimeFormatter parserWithTz = DateTimeFormatter.ofPattern("yy-MM-dd HH:mm:ss.SSS")
                                            .withZone(zoneId);
        ZonedDateTime zdt2 = ZonedDateTime.parse("14-05-29 17:42:20.123", parserWithTz);
        System.out.println(zdt2);
 
        // A sample date-time DST is off
        System.out.println(LocalDateTime.parse("14-12-29 17:42:20.123", parser).atZone(zoneId));
 
        // If you need the date-time with just the time zone offset
        OffsetDateTime odt = zdt.toOffsetDateTime();
        System.out.println(odt);
    }
}

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