Epoch to ISO 8601 Java

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

class EPOCToISO {
  public static void main(String[ ] args) {
    Long epoch = 1535109390070L;
    Instant i = Instant.ofEpochMilli(epoch);
    ZonedDateTime z = ZonedDateTime.ofInstant(i, ZoneOffset.UTC);
    System.out.println(DateTimeFormatter.ISO_INSTANT.format(z));
  }
}