Obtains a {@code Duration} representing a number of standard hours.
!(p)
The seconds are calculated based on the standard definition of an hour,
where each hour is 3600 seconds.
The nanosecond _in second field is set to zero.
@param hours the number of hours, positive or negative
@return a {@code Duration}, not null
@throws ArithmeticException if the input hours exceeds the capacity of {@code Duration}
Obtains a {@code Duration} representing a number of standard hours. !(p) The seconds are calculated based on the standard definition of an hour, where each hour is 3600 seconds. The nanosecond _in second field is set to zero.
@param hours the number of hours, positive or negative @return a {@code Duration}, not null @throws ArithmeticException if the input hours exceeds the capacity of {@code Duration}