AP CSA CodeHS 7.3 Flashcards

Questions and Answers

What does the method removeEvens do?

It removes all even numbers from the ArrayList.

What does the main method in the Odds class do?

Prints all numbers from 1 to 20

Adds odd numbers to an ArrayList (correct)

Generates random numbers

Removes even numbers from an ArrayList (correct)

What is the purpose of the condense method in ArrayListMethods?

It combines adjacent elements in the ArrayList.

What does the duplicate method in ArrayListMethods do?

It creates duplicates of each element in the ArrayList. Signup and view all the answers

The class that represents a travel route with various stops is called ______

RoadTrip Signup and view all the answers

Which class is responsible for storing geographical locations?

GeoLocation Signup and view all the answers

The toString method in the RoadTrip class returns the list of stops in the trip.

True Signup and view all the answers

How does the getTripLength method calculate the total distance?

By summing the distances between consecutive GeoLocation stops. Signup and view all the answers

What is the radius of the Earth as defined in the GeoLocation class?

3963.1676 miles Signup and view all the answers

Study Notes

Traversing Odds

Demonstrates the use of an ArrayList to store odd numbers.
Pre-loads the list with integers from 1 to 20.
Calls the removeEvens method to filter out even numbers.
The removeEvens method iterates through the list, checking the modulus against 2, and removes even numbers while adjusting the index to avoid skipping elements.

ArrayList Helper Methods

Introduces helper methods for manipulating ArrayList objects.
print method displays all elements in an ArrayList.
condense method combines adjacent elements into one, effectively halving the size.
duplicate method inserts a duplicate of each element after its original in the list, effectively doubling the size.
Example usage includes creating an ArrayList of strings and applying the helper methods.

Road Trip Functionality

Implements a RoadTrip class to manage trip stops and calculate distance.
Allows adding stops with associated geographical coordinates (latitude, longitude).
getNumberOfStops returns the total count of stops added to the trip.
getTripLength calculates the total distance between consecutive stops using the Haversine formula.
The toString method formats the trip's stops for output.
GeoLocation class encapsulates location data, including distance calculations between locations based on latitude and longitude.

Description

Test your knowledge with these flashcards on traversing odds in Java. This quiz covers key concepts from section 7.3.6 of the AP Computer Science A curriculum. Understand how to manipulate ArrayLists and remove even numbers effectively.