ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Classes and Objects Videos 18 videos

AP Computer Science 1.1 Classes and Objects
468 Views

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
245 Views

AP Computer Science 1.3 Classes and Objects. Which of the following should be declared as a static variable?

AP Computer Science 1.4 Classes and Objects
213 Views

In this question, which of the choices correctly constructs a Time(int hours, int minutes, int seconds) object?

See All

AP Computer Science 3.2 Classes and Objects 183 Views


Share It!


Description:

AP Computer Science: Classes and Objects Drill 3, Problem 2. Which of the following is a correct implementation of the getPaddlerName accessor method?

Language:
English Language

Transcript

00:00

Sorry And here's your shmoop du jour brought to you

00:05

by access or methods access or methods I didn't even

00:09

access refrigerator They're mine Yeah shmoop drinking song Which of

00:22

the following is a correct implementation of the get paddler

00:25

name access or method And hear the potential answers thinking

00:31

thinking like back All right here we go This question

00:39

is more or less a matter of syntax But wait

00:42

What is an excess or method anyway And what's the

00:44

point of using one Well it's essentially just a small

00:47

method written to retrieve the data from a private variable

00:51

But why bother Isn't that needlessly complicated Why not just

00:55

make our variables public and reader Change him wherever we

00:58

want Well because that's like flying without a net If

01:01

we funnel every request for a variables data through access

01:04

or mutate er methods we get another place to put

01:06

code to act on that date each and every time

01:09

it's accessed or modify Imagine this you're creating a huge

01:13

game where players are in gold by defeating monsters and

01:16

later they can return to town and buy items with

01:18

their goal We'll call it world of shmoop craft Yeah

01:22

very retold in there with you in the area of

01:24

code where monsters were fought and gold is granted we'll

01:27

be adding a small number of gold to the players

01:29

Gold amount variable every time a monster is defeated And

01:33

when players go to the shop to buy things we

01:35

subtract the necessary Amount from the same variable No access

01:38

or or mutate or methods to check up on us

01:41

were totally naked here Good Now let's say the game

01:45

has been released to the public and thousands of people

01:48

are playing games with each other And the mischievous lord

01:50

beef is has discovered something interesting about your game If

01:54

he stands in a certain spot holds the attack buttoned

01:56

down he can slay the spider queen with one swipe

01:59

over and over and over forever believes a roll of

02:02

quarters on the keyboard to hold the button down and

02:04

lets it run overnight amassing a huge fortune and completely

02:08

throwing off the in game economy Well everyone else is

02:11

harder and fortune is worthless in lord be fist ruins

02:13

the game Thanks for nothing lord beef How could access

02:17

or um you tater methods have prevented this catastrophe Well

02:20

a lot of ways actually when using accessory mutate or

02:23

methods tto handle the bold amount variable One possibility would

02:26

be insert some logic that checks whether the amount of

02:28

gold has been modified in the last few seconds and

02:31

if so does not allow it to be modified again

02:34

I don't keep anyone's gold amount from dramatically skyrocketing in

02:37

case of some un forcing repeating issue somewhere or just

02:40

spitballing here since they're likely be a variable story number

02:43

of bad guys each player has slayed a check would

02:46

be implemented in the accessory mutate Er methods there if

02:49

any player or beef is included manages to somehow sleigh

02:52

and otherwise impossible amount of enemies in one day say

02:55

a thousand a special condition could be triggered Handle it

02:59

Maybe it even rig something amazing like an automated text

03:02

in the middle of the night saying you need to

03:04

wake up and take care of lord be fist but

03:06

imagine explaining that one to your spouse Really though there

03:10

are probably thousands of creative ways you could use accessory

03:13

indicator methods to protect the sanity of your variables It

03:16

might seem tedious to implement those methods but they'll save

03:19

you in the long run Hart's back to our question

03:21

which is the correct way to set up in access

03:23

or method to get the variable paddler name option is

03:27

a routine that simply prince paddler name to the console

03:29

that's no good We want to return the variable so

03:31

we can work With it option c also just prince

03:34

paddler name both and we're out b d any all

03:38

returned the variable but b is being declared as a

03:41

private methods No dice there Option d doesn't specify the

03:44

words string in its constructor so nothing be option is

03:48

right on the money It's public it specify string and

03:50

it returns the variable and in a statement that's never

03:53

been uttered in the entire history of humanity Good job

03:56

everyone We've saved the freestyle canoeing competition from the scores 00:04:00.7 --> [endTime] of lord beef

Related Videos

AP Computer Science 1.2 GridWorld Case Study and APIs
493 Views

AP Computer Science 1.2 GridWorld Case Study and APIs. What is the direction of the actor?

AP Computer Science 1.4 Standard Algorithms
200 Views

AP Computer Science 1.4 Standard Algorithms. How many times will mystery be called for mystery(n) for n > 1?

AP Computer Science 2.3 Classes and Objects
191 Views

AP Computer Science 2.3 Classes and Objects. Which of the following is correct implementation of the Country class?

AP Computer Science 3.4 Inheritance, Abstraction, and Polymorphism
204 Views

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
191 Views

AP Computer Science 4.2 Standard Algorithms. What kind of algorithm is the following?