Podcast
Questions and Answers
What is the formula used to calculate the distance in miles between two geo locations?
What is the formula used to calculate the distance in miles between two geo locations?
What are the fields in the TextMessage class?
What are the fields in the TextMessage class?
message, sender, receiver
What is the default maximum number of players in the Player class?
What is the default maximum number of players in the Player class?
10
What does the getArea method in the Circle class return?
What does the getArea method in the Circle class return?
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The PI value in the MathOperations class is static.
The PI value in the MathOperations class is static.
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Which methods in the Product class are overloaded?
Which methods in the Product class are overloaded?
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The method to get the winner of Rock, Paper, Scissors is called ___
The method to get the winner of Rock, Paper, Scissors is called ___
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Match the following classes with their primary function:
Match the following classes with their primary function:
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What is the purpose of the Rectangle class?
What is the purpose of the Rectangle class?
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What method is used to get the area of a Rectangle object?
What method is used to get the area of a Rectangle object?
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What is the output of the RectangleTester program when a rectangle with width 5 and height 12 is created?
What is the output of the RectangleTester program when a rectangle with width 5 and height 12 is created?
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The CoinFlips class simulates flipping a coin a specified number of times.
The CoinFlips class simulates flipping a coin a specified number of times.
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What do the variables named 'Bart' and 'Lisa' represent in the Messages class?
What do the variables named 'Bart' and 'Lisa' represent in the Messages class?
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Which of the following classes encapsulates properties of a flower?
Which of the following classes encapsulates properties of a flower?
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What method in the Dog class returns a description of the dog?
What method in the Dog class returns a description of the dog?
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How is the distance calculated between two GeoLocation objects?
How is the distance calculated between two GeoLocation objects?
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What does the Student class represent?
What does the Student class represent?
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The _____ method returns the name and grade level of the student.
The _____ method returns the name and grade level of the student.
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The BaseballPlayer class has a method to calculate the batting average.
The BaseballPlayer class has a method to calculate the batting average.
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What is the output of the Fraction class's toString method when the fraction is 1/2?
What is the output of the Fraction class's toString method when the fraction is 1/2?
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Study Notes
Rectangle Class
-
Rectangle Class Implementation: Contains attributes for
width
andheight
, methods for area and dimensions, and overridestoString()
for a descriptive output. -
RectangleTester Example: Tests
Rectangle
by creating an instance and printing its dimensions.
Method Calling in Rectangle Class
-
Getters for Rectangle Class:
getHeight()
,getWidth()
, andgetArea()
methods return corresponding attributes. - RectangleTester Use: Creates a rectangle instance and prints its dimensions and area using the defined methods.
Point Class Usage
-
Point Class Features: Stores x and y coordinates, includes a method to move the point and overrides
toString()
to display position. -
PointTester Example: Demonstrates creation, movement, and printing of
Point
objects.
Student Class Implementation
-
Attributes of Student Class: Contains
firstName
,lastName
, andgradeLevel
, and includes atoString()
method for representation. - StudentTester Demonstration: Creates student instances and prints their information.
Text Message Class
-
TextMessage Class Design: Defines sender, receiver, and message, with a
toString()
method for formatted output. -
Messages Example: Instantiates and prints messages between
Bart
andLisa
.
Coin Flip Simulation
-
CoinFlips Class: Simulates
FLIPS
number of coin tosses, counting heads and tails outcomes, and calculates percentages. - Randomizer Usage: Generates random boolean values for coin toss outcomes.
Longest Streak Tracker
- LongestStreak Class: Tracks longest consecutive "Heads" results from flips, resetting streak upon a "Tails" outcome.
- Implementation of Random Flips: Uses Randomizer for generating coin toss results.
Distance Calculation Between Locations
- GeoLocation Class: Contains latitude and longitude data; includes method for distance calculation based on spherical law of cosines.
- HowFarAway Program: Prompts user for location coordinates and calculates distance between two geographical points.
Triangle Class Details
-
Triangle Attributes: Initialized with
width
andheight
, includestoString()
for formatted output. - TriangleTester Usage: Tests triangle creation and output representation.
Flower and Dog Class Implementations
-
Flower Class: Encapsulates flower details (name, color, genus, species) with a descriptive
toString()
. -
Dog Class: Represents dog breed and name, with a formatter in
toString()
to display information.
Student Class Enhancements
- GPA Attribute Addition: Introduces a GPA field to student class with getter/setter methods and honors student determination.
- StudentTester Expansion: Logs output for student GPA and honors status checks.
Pizza Class Construction
- Pizza Object Design: Comprises type, toppings, and size with a formatted string representation.
Fraction Class Implementation
-
Fraction Class: Represents rational numbers with numerator and denominator; includes
toString()
and getter/setter methods.
Batting Average Calculation
- BaseballPlayer Class: Stores player stats, includes a method to calculate batting average, and formatted output for player performance.
Static Player Management
- Player Class: Maintains a static count of players, with a maximum limit and features construction to increase player count upon instantiation.
Unit Circle Calculation
- UnitCircle Class: Computes cosine and sine for angles in radians, displaying results for each calculated angle.
Text Message Getter Methods
- TextMessage Class: Includes getter methods for sender, receiver, and message content, facilitating information retrieval.
Fraction Getter/Setter Implementation
- Fraction Class Enhancements: Adds methods to retrieve and modify numerator and denominator values, improving data encapsulation.### Game Full Function
-
gameFull()
checks if the total number of players has reached the maximum limit. - Returns
true
iftotalPlayers
is greater than or equal tomaxPlayers
.
Circle Area Calculation
- Class
CircleTester
tests the area calculation of circles with specific radii. - Creates a
Circle
object with radius 5 and prints its area. - Creates another
Circle
object with radius 12 and prints its area. - Class
Circle
defines a static constantPI
for mathematical calculations. -
getArea()
method calculates the area using the formula: Area = π * radius².
Rock, Paper, Scissors Winner Logic
- Method
getWinner()
determines the result between the user's choice and the computer's choice. - If both choices are the same, it returns "Tie".
- Implements rules for winning:
rock
beatsscissors
,scissors
beatspaper
,paper
beatsrock
.
Rock, Paper, Scissors Game Implementation
- Class
RockPaperScissors
facilitates interaction with the user through console inputs. - Utilizes constants for win messages and options (
rock
,paper
,scissors
). - Continues taking user input until a null value is provided.
- Randomly generates the computer's choice using
Randomizer
.
Randomizer Class
- Singleton design pattern ensures only one instance of the
Random
object exists. - Provides various random number generation methods:
-
nextBoolean()
,nextInt(min, max)
, andnextDouble(min, max)
.
-
- Allows customization of probability for boolean outcomes.
Product Method Overloading
- Class
Product
defines multiple overloaded methods to calculate products of different data types. - Supports operations for:
- Two integers
- Two doubles
- Integer and double in either order
- Three integers or three doubles.
- Each method outputs the product result after performing the calculation.
Variable Scope in Math Operations
- Class
MathOperations
illustrates usage of local and instance variables. - Defines various mathematical operations including
sum
,difference
,product
,circleCircumference
, andcircleArea
. - Prints out values of
PI
, and parameters within method scopes to demonstrate variable accessibility. - Calculates circumference and area by invoking the respective formulas.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge of the Rectangle class from CodeHS Unit 4 with this flashcard quiz. Understand how to create and utilize the Rectangle class in Java by reviewing the provided code snippets. Ideal for beginners looking to reinforce their Java programming skills.