Growth Level

Section 6.3 Growth Level

Objectives

Use Java Wrapper classes to fix a program designed to manage dogs in a shelter

Subsection 6.3.1 Overview

The following program represents a simple management system to track the number of dogs in a shelter. It includes functionalities such as adding, deleting and displaying the count for a breed of dogs. However, the program contains several syntax and logical errors that prevent it from functioning properly.

Subsection 6.3.2 Instructions

Initialize a static ArrayList of Integer called dogCounts that will store the number of dogs for each breed
Review the code and correct the errors to ensure the program operates as expected

import java.util.ArrayList;

public class DogShelter {

//TO-DO: Initialize ArrayList here

public static void main(String[] args) {

// Adding counts for three types of dogs
        dogCounts.add(new Integer(15);
        dogCounts.add(new Integer(30));
        dogCounts.add(new Integer(20);
        
        // Display initial dog counts
        System.out.println("Initial Dog Counts:");
        displayDogs();

// Increase count for second breed of dog
        addBreed(1 5);

// Remove the third breed
        deleteBreed(2;

// Display updated dog counts
        System.out.println("\nUpdated Dog Counts:");
        displayDogs();
    }

public static void addBreed(int index, int count) {
        int updatedCount = dogCounts.get(index) + count;
        dogCounts.set(index, new Integer(updatedCount));
    }

public static void deleteBreed(int index) {
        dogCounts.remove(index + 1);

}

public static void displayDogs() {
        for (int i = 0; i dogCounts.size(); i++) {
            System.out.println("Breed " + (i) + " has " + dogCounts.get(i) + " dogs.");
        }
    }
}

The expected output is:

Initial Dog Counts:
Breed 1 has 15 dogs.
Breed 2 has 30 dogs.
Breed 3 has 20 dogs.

Updated Dog Counts:
Breed 1 has 15 dogs.
Breed 2 has 35 dogs.

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