/**
* Returns a new instance with the specified number of hours added.
*
* <p>This instance is immutable and unaffected by this method call.
*
* @param hours the amount of hours to add, may be negative
* @return the new period plus the specified number of hours
* @throws ArithmeticException if the result overflows an int
*/
public Hours plus(int hours) {
if (hours == 0) {
return this;
}
return Hours.hours(FieldUtils.safeAdd(getValue(), hours));
}
