java - Duration does not support DAYS contrary to class documentation -

in java.time framework of java 8 , later, duration class says:

this class models quantity or amount of time in terms of seconds , nanoseconds. can accessed using other duration-based units, such minutes , hours. in addition, days unit can used , treated equal 24 hours, ignoring daylight savings effects.

yet when call get method , pass chronounit.days, exception thrown.

localtime start = localtime.of ( 0 , 0 , 0 ); // first moment of day. localtime stop = localtime.of ( 2 , 0 , 0 ); // 2 am.  duration duration = duration.between ( start , stop ); long days = duration.get ( chronounit.days ); 

exception in thread "main" java.time.temporal.unsupportedtemporaltypeexception: unsupported unit: days

am misunderstanding something, or misusing classes?

documentation get on duration class.

gets value of requested unit. returns value each of 2 supported units, seconds , nanos. other units throw exception.

however, duration class has method called todays:

gets number of days in duration. returns total number of days in duration dividing number of seconds 86400. based on standard definition of day 24 hours.