ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Inheritance, Abstraction, and Polymorphism Videos 17 videos

AP Computer Science 1.2 Inheritance, Abstraction, and Polymorphism
369 Views

APCS: Inheritance, Abstraction, and Polymorphism Drill 1, Problem 2. Which of the following is the correct way to begin writing your class?

AP Computer Science 1.1 Inheritance, Abstraction, and Polymorphism
203 Views

AP Computer Science 1.1 Inheritance, Abstraction, and Polymorphism. Which of the following are correct?

AP Computer Science 1.3 Inheritance, Abstraction, and Polymorphism
177 Views

AP Computer Science 1.3 Inheritance, Abstraction, and Polymorphism. Which of the following is true?

See All

AP Computer Science 1.2 Inheritance, Abstraction, and Polymorphism 369 Views


Share It!


Description:

APCS: Inheritance, Abstraction, and Polymorphism Drill 1, Problem 2. Which of the following is the correct way to begin writing your class?

Language:
English Language

Transcript

00:00

Sorry And here's your shmoop to use your brought to

00:05

you by object oriented programming It's got class that's really

00:10

funny the computer science majors around us or just rolling

00:13

on the floor right All right you would like to

00:15

define a subclass called bicycle as part of your ongoing

00:19

efforts to reduce your carbon footprint Which of the following

00:23

is a correct way to begin writing your class carbon

00:27

footprint like tires All right And here the potential answers

00:32

public clan All right well the key to answering this

00:37

question is knowing the syntax of defining a subclass in

00:40

java But what is a sub class submarine class Well

00:44

it's a lot like a normal class except a subclass

00:47

also inherits things from the super class it's extending from

00:51

so once we get set up and we're messing around

00:53

with our new bicycle class we'll be able to use

00:55

the access or methods of vehicle that we've already written

00:59

Got it all right Well this idea is known as

01:01

inheritance in object oriented programming and it doesn't involve trying

01:05

to make your distant ninety eight year old relatives think

01:08

you're interesting Anyhow this is a question of syntax and

01:12

that's In texas public class new subclass extends class way

01:18

know for a fact that bicycle is intended to be

01:20

a subclass of vehicle It hangs down like fruit on

01:24

a tree so he is certainly out He creates a

01:26

class called vehicle that extends from bicycle and it's the

01:29

wrong way around Option a is also an option a

01:32

uses new to declare the subclass bicycle exist but the

01:36

question is asking us to define it similar words but

01:39

two very different things A declaration simply says something exists

01:43

but doesn't describe what the class or function actually does

01:47

The question was asking us to define the class Instead

01:51

option b and c use the word super rather than

01:54

extends which isn't proper syntax whatsoever So that just leaves

01:58

us with d which has both the correct syntax and 00:02:00.796 --> [endTime] the classes in their proper order They were walking

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?