Session 15

Source Code

import java.util.*;

public class Session15 {
    public static void main(String[] args) {
        System.out.println("Session 15");

        // Menu
        System.out.println("Menu");
        System.out.println("E1 - Example 1");

        // setup Scanner
        Scanner in = new Scanner(System.in);
        System.out.print("Choice: ");
        String choice = in.nextLine();

        // switch choices
        switch (choice) {
            case "E1":
                System.out.println("Example 1");
                example1();
                break;
            case "E2":
                System.out.println("Example 2");
                example2();
                break;
            case "E3":
                System.out.println("Example 3");
                example3();
                break;
            case "E4":
                System.out.println("Example 4");
                example4();
                break;
            case "E5":
                System.out.println("Example 5");
                example5();
                break;
            case "E6":
                System.out.println("Example 6");
                example6();
                break;
            case "E7":
                System.out.println("Example 7");
                example7();
                break;
            case "E8":
                System.out.println("Example 8");
                example8();
                break;
            default:
                System.out.println("Invalid choice");
        }
    }

    // example1 method
    public static void example1() {
        // Create Location object
        

        // Create Learner object that has a Location
        

        // Demonstrate accessing object data
        

    }

    // example2 method
    public static void example2() {
        // create ingredients
        

        // valid recipe
        
    }

    // example3 method
    public static void example3() {
        // create ingredients
        

        // invalid recipe
        
    }

    // example4 method
    public static void example4() {
        

        // Get a reference to the current song
        

        // Modify the song
        

        // The song inside MusicPlayer is affected
        
    }

    // example5 method
    public static void example5() {
        

        // Modify the returned object directly
        

    }

    // example6 method
    public static void example6() {
        
    }

    // example7 method
    public static void example7() {
        
    }

    // example8 method
    public static void example8() {
        // isPrime
        

        // fibonacci
       

        // gcd
      

    }
}

Location.java

/**
 * The Location class represents a physical location.
 * It stores address-related information such as street,
 * city, state, and zip code.
 */
public class Location
{
    /** Street address */
    

    /** City name */
    

    /** State abbreviation */
    

    /** Zip code */
    

    /**
     * Constructs a Location object with the given address information.
     *
     * @param street the street address
     * @param city the city name
     * @param state the state abbreviation
     * @param zipCode the zip code
     */
    

    /**
     * Returns the city for this Location.
     *
     * @return the city name
     */
    
    
}

Learner.java

/**
 * The Learner class represents a learner with a name
 * and a home location.
 * This class demonstrates a has-a relationship
 * using an object instance variable.
 */
public class Learner
{
    /** The learner's name */
    

    /** The learner's location */
    

    /**
     * Constructs a Learner object with a name and location.
     *
     * @param name the learner's name
     * @param location the learner's Location object
     */
    
    
    /**
     * Returns the learner's name.
     *
     * @return the learner's name
     */
    

    /**
     * Returns the learner's location.
     *
     * @return the Location object associated with this learner
     */
   
   
}

GamerDemo.java

public class GamerDemo
{
    public static void main(String[] args)
    {
        // TODO: Create a Console object
        
        // TODO: Create a Gamer object using the Console

        // TODO: Print the gamer's username

        // TODO: Print the console brand

        // TODO: Print the console storage capacity
                      
                                          
    }
}

Gamer.java

/**
 * The Gamer class represents a gamer who owns a console.
 * This class demonstrates a has-a relationship
 * between a Gamer and a Console.
 */
public class Gamer
{
    /** The gamer's username */
    private String username;

    /** The console owned by the gamer */
    private Console console;

    /**
     * Constructs a Gamer object with a username
     * and a console.
     *
     * @param username the gamer's username
     * @param console the Console object owned by the gamer
     */
    public Gamer(String username, Console console)
    {
        // TODO: initialize instance variables
    }

    /**
     * Returns the gamer's username.
     *
     * @return the username
     */
    public String getUsername()
    {
        // TODO
        return "";
    }

    /**
     * Returns the console owned by the gamer.
     *
     * @return the Console object
     */
    public Console getConsole()
    {
        // TODO
        return null;
    }
}

Console.java

/**
 * The Console class represents a gaming console.
 * It stores information about the console's brand
 * and available storage space.
 */
public class Console
{
    /** The brand of the console */
    private String brand;

    /** The storage capacity of the console in gigabytes */
    private int storageGB;

    /**
     * Constructs a Console object with the given brand
     * and storage capacity.
     *
     * @param brand the console brand
     * @param storageGB the storage capacity in gigabytes
     */
    public Console(String brand, int storageGB)
    {
        // TODO: initialize instance variables
    }

    /**
     * Returns the brand of the console.
     *
     * @return the console brand
     */
    public String getBrand()
    {
        // TODO
        return "";
    }

    /**
     * Returns the storage capacity of the console.
     *
     * @return the storage capacity in gigabytes
     */
    public int getStorageGB()
    {
        // TODO
        return 0;
    }
}

Ingredient.java

/**
 * The Ingredient class represents an ingredient in a recipe or inventory.
 * Each ingredient has a name, an amount, a unit of measurement, and an 
 * indication of whether it is organic.
 */
public class Ingredient {

    // Instance variables
    

    /**
     * Constructs a new Ingredient with the specified properties.
     *
     * @param name    The name of the ingredient.
     * @param amount  The quantity of the ingredient.
     * @param unit    The unit of measurement for the ingredient.
     * @param organic True if the ingredient is organic; false otherwise.
     */
    

    /**
     * Returns the name of the ingredient.
     *
     * @return The name of the ingredient.
     */
    

    /**
     * Returns the amount of the ingredient.
     *
     * @return The quantity of the ingredient.
     */
    

    /**
     * Returns the unit of measurement for the ingredient.
     *
     * @return The unit of measurement (e.g., "cups", "grams").
     */
    

    /**
     * Checks if the ingredient is organic.
     *
     * @return True if the ingredient is organic, false otherwise.
     */
        }
}

Recipe.java

/**
 * The Recipe class represents a recipe with a name, a main ingredient,
 * a secondary ingredient, and a cooking time. It provides methods to calculate
 * the cost of the recipe, check if the recipe is fully organic, and determine
 * the nutritional rating based on ingredient properties.
 */
public class Recipe {

    // Instance variables
    

    /**
     * Constructs a new Recipe with the specified name, ingredients, and cooking
     * time.
     * If invalid parameters are provided, default values are used instead.
     *
     * @param name        The name of the recipe. 
     * @param main        The main ingredient of the recipe. 
     * @param secondary   The secondary ingredient of the recipe. 
     * @param cookingTime The cooking time in minutes. If less than or equal to
     *                    zero, defaults to Integer.MIN_VALUE.
     */
    
    
    /**
     * Calculates the total cost of the recipe.
     *
     * @return The total cost of the recipe.
     */
    

    /**
     * Checks if the recipe is fully organic.
     *
     * @return True if both ingredients are organic, false otherwise.
     */
    
    

    /**
     * Determines the nutritional rating of the recipe.
     *
     * @return The nutritional rating ("A", "B", or "C").
     */
    

    /**
     * Returns the cooking time for the recipe.
     *
     * @return The cooking time in minutes.
     */
    
    
    /**
     * Returns a string representation of the recipe.
     *
     * @return A string containing the recipe details.
     */
    @Override
    public String toString() {
        String recipeString = "Recipe: " + name + "\n";
        recipeString += "Main Ingredient: " + mainIngredient.getName() + "\n";
        recipeString += "Secondary Ingredient: " + secondaryIngredient.getName() + "\n";
        recipeString += "Rating: " + getNutritionalRating() + "\n";
        recipeString += "Cooking Time: " + getCookingTime() + " minutes";
        return recipeString;
    }
}

MealPlan.java

/**
 * The MealPlan class represents a weekly meal plan, including two recipes,
 * the total number of servings, and methods to calculate cost and check if
 * the plan is fully organic.
 */
public class MealPlan {



    /**
     * Constructs a MealPlan with the specified name, recipes, and servings.
     * If invalid parameters are provided, default values are used.
     *
     * @param name            The name of the meal plan.
     * @param breakfastRecipe The breakfast recipe.
     * @param lunchRecipe The breakfast recipe.
     * @param dinnerRecipe    The dinner recipe.
     */


 

    /**
     * Calculates the total cost of the meal plan for the week.
     *
     * @return The total cost of the meal plan.
     */
 
 
    /**
     * Checks if the meal plan is fully organic.
     *
     * @return True if both recipes are fully organic, false otherwise.
     */



    /**
     * Returns a summary of the meal plan, including its name, total cost,
     * and organic status.
     *
     * @return A summary string of the meal plan.
     */
 
    public static void main(String[] args) {
        // breakfast recipe
        
        
        // lunch recipe
        
        
        // dinner recipe
        

        // Valid meal plan


    }
}

Calculator.java

import java.util.*;
/**
 * The Calculator class provides basic arithmetic operations.
 * @author CGA Student
 */
public class Calculator {

    /**
     * Adds two integers.
     *
     * @param a the first integer
     * @param b the second integer
     * @return the sum of a and b
     */
    public int add(int a, int b) {
        return a + b;
    }

    /**
     * Main method.
     *
     * @param args command line arguments (not used)
     */
    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        // Example
        System.out.println("Addition: " + calculator.add(10, 5));
        
        // Ask the user for two numbers
        
        
        
        
    }
}

Song.java

/**
 * The Song class represents a song with a title and duration.
 * This class is used to demonstrate object references in Java.
 */
public class Song {

    /** The title of the song */
    

    /** The length of the song in seconds */
    

    /**
     * Constructs a Song with a title and duration.
     *
     * @param title the title of the song
     * @param duration the length of the song in seconds
     */
    

    /**
     * Returns the title of the song.
     *
     * @return the song title
     */
    
    

    /**
     * Returns the duration of the song.
     *
     * @return the duration in seconds
     */
    
    

    /**
     * Updates the title of the song.
     *
     * @param newTitle the new title
     */
  
  

    /**
     * Extends the duration of the song.
     *
     * @param extraSeconds number of seconds to add
     */
    
    

    /**
     * Returns a string representation of the song.
     *
     * @return song description
     */
    
    
}

MusicPlayer.java

/**
 * The MusicPlayer class represents a music player
 * that keeps track of the currently playing song.
 */
public class MusicPlayer {

    /** The song currently playing */
    

    /**
     * Constructs a MusicPlayer and sets an initial song.
     */
    

    /**
     * Returns the song currently playing.
     * This method returns a reference to the Song object,
     * not a copy.
     *
     * @return the current song
     */
    
}

CityBankAccount.java

/**
 * Represents a bank account at CityBank.
 */
public class CityBankAccount{

    // instance variables
    private double balance;

    /**
     * Constructs a BankAccount with an initial balance.
     *
     * @param initialBalance the starting balance
     */
    

    /**
     * Deposits money into the account.
     *
     * @param amount the amount to deposit
     */
   

    /**
     * Withdraws money from the account.
     *
     * @param amount the amount to withdraw
     */
   

    /**
     * Returns the current balance.
     *
     * @return the account balance
     */
    

}

CityBankCustomer.java

/**
 * Represents a CitiBank customer.
 */
public class Customer {

    // instance variables
    private String name;
    private CityBankAccount account;

    /**
     * Constructs a Customer with a name and an initial account balance.
     *
     * @param name the customer's name
     * @param initialBalance the starting balance
     */
    public Customer(String name, double initialBalance) {
        this.name = name;
        account = new CityBankAccount(initialBalance);
    }

    /**
     * Returns the customer's bank account.
     * This method should return a reference to the BankAccount object,
     * not a copy.
     *
     * @return the customer's bank account
     */
    public CityBankAccount getAccount() {
        // TODO: return the account
        return null;
    }
}

CityBankDemo.java

public class CityBankDemo {
    public static void main(String[] args) {
        // CityBankCustomer c = new CityBankCustomer("Alex", 500.0);

        // Access the same BankAccount through the returned reference
        // CityBankAccount acct = c.getAccount();
        // acct.deposit(200.0);
        // acct.withdraw(50.0);

        // System.out.println(acct.getBalance());
    }
}

User.java

public class User {
    /*
     * Class-wide counter used to generate sequential IDs for all User instances.
     */
    

    /**
     * The unique identifier assigned to this User instance.
     */
    

    /**
     * Creates a new User and assigns it a unique ID from the shared counter.
     * The counter is then incremented so the next User gets a different ID.
     */
    

    /**
     * Returns this user's unique identifier.
     *
     * @return the unique ID for this User
     */
    

    /**
     * Resets the shared ID counter back to 1.
     * This affects IDs assigned to subsequently created User instances.
     */
    
    
}

MathUtilities.java

public class MathUtilities {
    // Class methods - no object needed
    
    // Check if a number is prime
    

    // Calculate nth Fibonacci number (1, 1, 2, 3, 5, 8, 13, ...)
    
    
    // Calculate greatest common divisor using Euclidean algorithm
    
}

Dealership.java

/**
 * The Dealership class represents a car dealership that tracks its inventory,
 * including individual car details and overall inventory statistics.
 * 
 * This class includes instance variables for individual car attributes such as
 * make, model, year, and price, as well as class variables to track total inventory details,
 * including the total number of cars and the total inventory value.
 */
public class Dealership {

    /**
     * The make of the car (e.g., Toyota, Honda, etc.).
     */
   

    /**
     * The model of the car (e.g., Camry, Civic, etc.).
     */
  

    /**
     * The manufacturing year of the car.
     */


    /**
     * The price of the car in dollars.
     */
   

    /**
     * The total number of cars in the dealership’s inventory.
     * This is a class-level variable shared across all objects of this class.
     */
   

    /**
     * The total value of all cars in the dealership’s inventory.
     * This is a class-level variable shared across all objects of this class.
     */
    

    /**
     * Constructs a new Dealership object with the specified attributes.
     * Also updates the total inventory statistics for all cars in the dealership.
     *
     * @param make  The make of the car.
     * @param model The model of the car.
     * @param year  The manufacturing year of the car.
     * @param price The price of the car.
     */
    

    /**
     * Returns the details of the car in formatted string form.
     * For example: "Make: Toyota, Model: Camry, Year: 2020, Price: $30000.00".
     *
     * @return A formatted string containing the car details.
     */
    

    /**
     * Returns the total number of cars in the dealership's inventory.
     *
     * @return The total number of cars.
     */
    

    /**
     * Returns the total value of all cars in the dealership's inventory.
     *
     * @return The total inventory value.
     */
    

    /**
     * Returns the average price of all cars in the dealership's inventory.
     * If there are no cars in inventory, this should return 0.
     *
     * @return The average price of cars in the inventory.
     */
    

    /**
     * The main method to test the functionality of the {@code Dealership} class.
     *
     * @param args Command-line arguments (not used).
     */
    public static void main(String[] args) {
        // Create some cars and add them to the dealership inventory
        

        // Print individual car details
       

        // Print dealership statistics
        
    }
}