gistfile1.txt

  public static void main(String[] args) {
    Instant instant = Instant.ofEpochMilli(System.currentTimeMillis());
    String timeZone1 = ZoneId.SHORT_IDS.get("CST");
    String timeZone2 = ZoneId.SHORT_IDS.get("JST");
    String timeZone3 = "UTC";
    ZonedDateTime zonedDateTime1 = ZonedDateTime.ofInstant(instant, ZoneId.of(timeZone1));
    ZonedDateTime zonedDateTime2 = ZonedDateTime.ofInstant(instant, ZoneId.of(timeZone2));
    ZonedDateTime zonedDateTime3 = ZonedDateTime.ofInstant(instant, ZoneId.of(timeZone3));

    System.out.println(String.format("%2s:%2s %s", zonedDateTime1.getHour(), zonedDateTime1.getMinute(), zonedDateTime1));
    System.out.println(String.format("%2s:%2s %s", zonedDateTime2.getHour(), zonedDateTime2.getMinute(), zonedDateTime2));
    System.out.println(String.format("%2s:%2s %s", zonedDateTime3.getHour(), zonedDateTime3.getMinute(), zonedDateTime3));
  }

gistfile2.txt

19:53 2018-12-09T19:53:43.916-06:00[America/Chicago]
10:53 2018-12-10T10:53:43.916+09:00[Asia/Tokyo]
 1:53 2018-12-10T01:53:43.916Z[UTC]