ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Playlist AP® Computer Science: Classes and Objects 17 videos
AP Computer Science: Classes and Objects Drill 1, Problem 1. Which of the following is a correct {/* Implementation */} for the isInsect method?
AP Computer Science 1.3 Classes and Objects. Which of the following should be declared as a static variable?
In this question, which of the choices correctly constructs a Time(int hours, int minutes, int seconds) object?
AP Computer Science 3.1 Classes and Objects 187 Views
Share It!
Description:
In this computer science problem, which of the following should be declared as private?
Transcript
- 00:00
Sorry And here's your shmoop douceur brought to you by
- 00:05
canoe jokes can new jokes or you kidding me Which
- 00:15
of the following should be declared His private song name
- 00:18
gets on name prince We're writing a class called paddling
- 00:26
songs to keep track of a killer paddling playlist and
Full Transcript
- 00:29
we're being asked which bits should be declared private Well
- 00:33
i don't want bring song name being that we're writing
- 00:36
an access or method called get song name specifically teo
- 00:39
get data from song name the string song name should
- 00:42
indeed be private things like this A private variable is
- 00:45
like your friends Your friend is overprotective of her kat
- 00:48
so she doesn't let anyone see it or pet it
- 00:51
However if you want your friend will bring the cat
- 00:54
out of the house and let you see it pet
- 00:56
It will bring the cat out whenever you ask her
- 00:58
to just his access Her methods bring private variables out
- 01:02
Julia item to get song name is our access or
- 01:05
method Making it private would make it possible to access
- 01:09
song ing item three hour print function Well it'll also
- 01:12
needed to use definitely should not be driving That means
- 01:15
only item one should be private and our answer will
- 01:18
be a but wait why even use successor methods at
- 01:21
all Couldn't we just make strings public Then we could
- 01:24
read from them any Time from anywhere in the program
- 01:27
without having a father with access or method Well that's
- 01:29
true there's no law against it But doing things this
- 01:32
way is the best practice gives us what's called an
- 01:34
abstraction layer well imagine this You've written a huge programme
- 01:38
and in various places throughout your accessing variables directly Well
- 01:42
values were getting changed over here accessed over here Change
- 01:45
down there it's bedlam way have mutate er methods so
- 01:49
that users can't change data any which way they want
- 01:51
you taters finally all the request to change data for
- 01:55
one checkpoint and make sure users are not changing data
- 01:58
in a bad way Blacks esther's you're just annoying repercussion
- 02:02
of using mutated by making variables private and edited on
- 02:06
ly through mu taters we essentially lock off all access
- 02:09
to the variables Thus we need access er's toe let
- 02:12
users get the values of the private variables Tons have
- 02:15
overkill for a simple project where you keep track of
- 02:18
a playlist well maybe but it's a good habit tohave
- 02:20
And when your simple project balloons into an enterprise level
- 02:23
canoe related media organizational solution well you'll be glad it's 00:02:27.51 --> [endTime] there
Related Videos
AP Computer Science 2.3 Classes and Objects. Which of the following is correct implementation of the Country class?
AP Computer Science 1.2 GridWorld Case Study and APIs. What is the direction of the actor?
AP Computer Science 1.4 Standard Algorithms. How many times will mystery be called for mystery(n) for n > 1?
AP Computer Science 3.4 Inheritance, Abstraction, and Polymorphism. Which of the following will satisfy the conditional if statement for boo, str,...
AP Computer Science 4.2 Standard Algorithms. What kind of algorithm is the following?