get the unix timestamp from type 1 uuid

Question

In our java application we are trying to get the unix time from the type 1 uuid. But its not giving the correct date time values.

long time = uuid.timestamp(         


        

Answer 1

From the docs for timestamp():

The resulting timestamp is measured in 100-nanosecond units since midnight, October 15, 1582 UTC.

So you need to offset it from that. For example:

Calendar uuidEpoch = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
uuidEpoch.clear();
uuidEpoch.set(1582, 9, 15, 0, 0, 0); // 9 = October
long epochMillis = uuidEpoch.getTime().getTime();

long time = (uuid.timestamp() / 10000L) + epochMillis;
// Rest of code as before