Setting zoned date time as UTC in a new java.util.Date object

ZonedDateTimeAsUTC.java

/*
* 
* Methods manipulate milliseconds field (fastTime) in java.util.Date object.
*
* UTC               : 12/10/2017 11:15:00
* Local date time   : 12/10/2017 14:15:00 +03:00
*   
* @return new java.util.Date
*       UTC             : 12/10/2017 14:15:00
*       Local date time : 12/10/2017 17:15:00 +03:00
*/

Date inJodaTimeWay(Date date) {
    return new DateTime(date.getTime(), DateTimeZone.forID("Europe/Istanbul"))
            .toLocalDateTime()
            .toDate(TimeZone.getTimeZone("UTC"));
}

Date inJavaTimeWay(Date date) {
    return new Date(date
                .toInstant()
                .atZone(ZoneId.of("Europe/Istanbul"))
                .toLocalDateTime()
                .toInstant(ZoneOffset.UTC)
                .toEpochMilli());
}