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AP Computer Science A Videos 108 videos
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AP Computer Science 2.3 Classes and Objects 191 Views
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Description:
AP Computer Science 2.3 Classes and Objects. Which of the following is correct implementation of the Country class?
Transcript
- 00:00
Hurry And here's your smoke du jour brought to you
- 00:05
by monster trucks They're totally crushing it Which of the
- 00:09
following is the correct implementation of the country class They
- 00:13
rebuilt this and here your pencil answers All right you
- 00:21
done reading on country Here we go All right well
Full Transcript
- 00:23
this is certainly a huge mass of a question before
- 00:26
we read every single line and wait for our brains
- 00:28
to leak out of our ears Let's figure out what
- 00:30
we're supposed to be looking for The question asked for
- 00:33
the correct implementation of the country class and the description
- 00:37
suggests it's a class used to hold a few data
- 00:39
members access her methods for that data and a print
- 00:42
match All this stuff right here From this we can
- 00:45
probably assume the question is mostly about the proper way
- 00:49
to set up access or method And we know that
- 00:54
Access or methods They're supposed to be public methods that
- 00:56
access private data So let's just get rid of everything
- 00:59
which doesn't follow that rule first and we'll do that
- 01:02
by driving over the incorrect answers with a monster truck
- 01:05
in option a The strings air private and the access
- 01:07
er message are public That's A good sign so they
- 01:10
can stay for now And same with b option c
- 01:15
Here the strings are public We wouldn't need access or
- 01:21
methods at all if we were using public strings so
- 01:24
option sees that and he too Indeed the strings were
- 01:28
private in the methods or public as they should be
- 01:31
but look more closely The entire class is declared to
- 01:34
be private that leaves and be nearly identical Ah but
- 01:39
wait See it right there Option a is trying to
- 01:42
create a new class with the words new class but
- 01:45
that's not valid syntax to create a new public class
- 01:49
will need to be more like a cousin pee which
- 01:52
says public class instead Yeah nice try but we'll be 00:01:56.576 --> [endTime] going to be
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