BigQuery:Java:Examples Incorrect example for setting expiration for the table  #1371

Expiration is shown in pure milliseconds of time and not in milliseconds since the epoch like stated in method documentation.

Instead, the example should use:

Long newExpiration = TimeUnit.MILLISECONDS.convert(1, TimeUnit.DAYS) + ZonedDateTime.now(ZoneOffset.UTC).toInstant().toEpochMilli();

or simple

Long newExpiration = TimeUnit.MILLISECONDS.convert(1, TimeUnit.DAYS) + System.currentTimeMillis();

Environment details

1. OS type and version: Any
2. Java version: 8
3. bigquery version(s): 1.133.0

Steps to reproduce

1. Just try an example and your table will disappear because the expiration date will be in the past