JAVA

java convert LocalDateTime to long

    public long createTimestamp() {
        ZoneId zoneId = ZoneId.systemDefault();
        return LocalDateTime.now().atZone(zoneId).toEpochSecond();
    }

convert long to localdatetime java

long test_timestamp = 1499070300L;
LocalDateTime triggerTime =
       LocalDateTime.ofInstant(Instant.ofEpochSecond(test_timestamp),
                               TimeZone.getDefault().toZoneId());   

System.out.println(triggerTime);