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AP Computer Science Videos 110 videos
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AP Computer Science 3.4 Classes and Objects 176 Views
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Description:
AP Computer Science: Classes and Objects Drill 3, Problem 4. Which of the following are objects?
Transcript
- 00:00
Laurie and here's your smoke usually brought to you by
- 00:04
the private declaration of album names because you don't always
- 00:08
want your friends to know you on them All right
- 00:10
consider the following declaration album A equals new album Kind
- 00:14
of blue miles davis nineteen fifty which of the following
Full Transcript
- 00:18
are objects okay And here your potential answers brought to
- 00:23
you by and let's go alright So java is an
- 00:28
object oriented language but that doesn't make everything an object
- 00:32
But some things are somethings are look the objects around
- 00:35
you right now No seriously like what do you got
- 00:37
Lamp bicycle autographed photo of the nineteen eighty nine oakland
- 00:40
athletics where jose conseco misspelled his own name on steroids
- 00:45
Yeah good us to write Each one of these is
- 00:48
an object with its own states and behaviors thing about
- 00:52
the bike it states could conceivably be things such as
- 00:55
its current speed current gear speed like here and whether
- 01:02
or not it's currently getting any sick air and it's
- 01:06
behaviors or functions It could do changing gears turning left
- 01:10
or right and so on The objects can be pretty
- 01:13
complex things different from objects though our classes and primitive
- 01:18
data types are a class isn't an object It's more
- 01:23
like the instruction manual from which objects are constructed An
- 01:26
object is an instance of a class all right it's
- 01:30
A lot like a recipe A cake recipe shows you
- 01:32
everything you need to make a huge gnarly cake The
- 01:35
recipe is not a cake object itself Primitive data types
- 01:38
are also not object Imagers long's floats bites There are
- 01:43
eight in all and they're just bear data that come
- 01:46
with none of the interesting stuff that makes objects on
- 01:49
objects Those faras this question is concerned We have three
- 01:52
players and were asked which of them are objects album
- 01:55
album year and uh well starting at the top album
- 01:59
is the class in question and we know that classes
- 02:02
are objects so we can cross that baby off strike
- 02:04
one album you're sure sounds like an object but it's
- 02:07
not looking back above album here is just an imager
- 02:11
Well manager is being primitive Data types are just a
- 02:13
bit of data Strike two a however is an object
- 02:17
declaration here Album a equals new album creates a new
- 02:21
object of the album class named eh that means our 00:02:25.045 --> [endTime] answer will be See Three only conform
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