Question

The Program (Java)
You will create a pet database program with the following operations incrementally as describe
in the Milestones section. You are not required to save the pet data into a file. You must use
appropriate design and make use of Object-Oriented Design. See milestones.
• Add pets
o Let the user add as many pets as they want. A pet is entered as a single line
consisting of a name and an integer which represents the age of the pet. The
user type “done” to end reading. See sample run.

• Show pets
o Prints a table of all pets in the database. See below or the sample run for the
formatting of the table.

• Update pets
o Shows the user a table of all the pets and reads the pet ID that the user wants to
update. ID is the array index of the object. Once the user has selected a pet by
typing and ID, it asks the user to enter the new name and new age. It then
updates the actual object.
• Search pets by name or age
o Prompts the user for a name and then displays a table showing all pets matching
the name. The name is case insensitive. For example, “boomer” will “Boomer”.
o Prompts the user for an age and shows a table consists of pets with that age.
• Remove a pet
o Prompts the user for the index of the Pet to delete.

Table Formatting:
Your program will display the results for view all pets, search pet by name and search pet by
age using a table as shown below. You will need to use System.out.printf() to format the table.
Below is a sample table with annotations as to which part is the header, rows, and footer. A
row represents a single record about a pet. The ID is the index in the array the object is
located. A table consists of zero more rows. You may use 3 characters for ID, 10 characters for
NAME, and 4 characters for AGE.
+----------------------+
| ID | NAME | AGE | header
+----------------------+
| 0 | Kitty | 8 |
| 1 | Bruno | 7 |
| 2 | Boomer | 8 | rows
| 3 | Boomer | 3 |
| 4 | Fiesty | 3 |
+----------------------+
5 rows in set. footer

Sample run

Pet Database Program.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 2
add pet (name, age): Kitty 8
add pet (name, age): Bruno 7
add pet (name, age): Boomer 8
add pet (name, age): Boomer 3
add pet (name, age): Fiesty 3
add pet (name, age): done
5 pets added.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 1 +----------------------
+
| ID | NAME | AGE | +----------------------+
| 0 | Kitty | 8 |
| 1 | Bruno | 7 |
| 2 | Boomer | 8 |
| 3 | Boomer | 3 |
| 4 | Fiesty | 3 | +----------------------+
5 rows in set.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 2

add pet (name, age): Krazy 11
add pet (name, age): done
1 pets added.
What would you like to do
?

1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 1 +----------------------
+
| ID | NAME | AGE | +----------------------+
| 0 | Kitty | 8 |
| 1 | Bruno | 7 |
| 2 | Boomer | 8 |
| 3 | Boomer | 3 |
| 4 | Fiesty | 3 |
| 5 | Krazy | 11 | +----------------------+
6 rows in set.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 3 +----------------------
+
| ID | NAME | AGE | +----------------------+
| 0 | Kitty | 8 |
| 1 | Bruno | 7 |
| 2 | Boomer | 8 |
| 3 | Boomer | 3 |
| 4 | Fiesty | 3 |
| 5 | Krazy | 11 | +----------------------+
6 rows in set.
Enter the pet ID you can to update:1
Enter new name and new age: Brunoozz 8

Bruno 7 changed to Brunoozz 8.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 1 +----------------------
+
| ID | NAME | AGE | +----------------------+
| 0 | Kitty | 8 |
| 1 | Brunoozz | 8 |
| 2 | Boomer | 8 |
| 3 | Boomer | 3 |
| 4 | Fiesty | 3 |
| 5 | Krazy | 11 | +----------------------+
6 rows in set.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 4 +----------------------
+
| ID | NAME | AGE | +----------------------+
| 0 | Kitty | 8 |
| 1 | Brunoozz | 8 |
| 2 | Boomer | 8 |
| 3 | Boomer | 3 |
| 4 | Fiesty | 3 |
| 5 | Krazy | 11 | +----------------------+
6 rows in set.
Enter the pet ID to remove: 1
Brunoozz 8 is removed.

What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 1 +----------------------
+
| ID | NAME | AGE | +----------------------+
| 0 | Kitty | 8 |
| 1 | Boomer | 8 |
| 2 | Boomer | 3 |
| 3 | Fiesty | 3 |
| 4 | Krazy | 11 | +----------------------+
5 rows in set.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 5
Enter a name to search:boomer +----------------------+
| ID | NAME | AGE | +----------------------+
| 1 | Boomer | 8 |
| 2 | Boomer | 3 | +----------------------+
2 rows in set.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 6

Enter age to search:3
+----------------------+
| ID | NAME | AGE |
+----------------------+
| 2 | Boomer | 3 |
| 3 | Fiesty | 3 |
+----------------------+
2 rows in set.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 1
+----------------------+
| ID | NAME | AGE |
+----------------------+
| 0 | Kitty | 8 |
| 1 | Boomer | 8 |
| 2 | Boomer | 3 |
| 3 | Fiesty | 3 |
| 4 | Krazy | 11 |
+----------------------+
5 rows in set.
What would you like to do?
1) View all pets
2) Add more pets
3) Update an existing pet
4) Remove an existing pet
5) Search pets by name
6) Search pets by age
7) Exit program
Your choice: 7
Goodbye!

Answer 1

Pet.java

public class Pet {
private static int count = 0;
private int id;
private String name;
private int age;

public Pet(String name, int age) {
this.id = count;
this.name = name;
this.age = age;
count++;
}

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}
}

PetDatabase.java

import java.util.ArrayList;
import java.util.Scanner;

public class PetDatabase {
private ArrayList<Pet> pets;

public PetDatabase() {
this.pets = new ArrayList<>();
}

public ArrayList<Pet> getPets() {
return pets;
}
  
public void viewAllPets()
{
if(this.pets.isEmpty())
{
System.out.println("\nSorry, no pets to show!\n");
return;
}
  
System.out.printf("\n%3s %10s %4s\n", "ID", "Name", "Age");
for (Pet pet : this.pets) {
System.out.printf("%3d %10s %4d\n", pet.getId(), pet.getName(), pet.getAge());
}
System.out.println();
}
  
public void addMorePets()
{
Scanner sc = new Scanner(System.in);
String line;
String name;
int age;
  
int count = 0;
  
System.out.println();
do
{
System.out.print("Add pet (name, age): ");
line = sc.nextLine().trim();
if(line.equalsIgnoreCase("done"))
break;
else
{
String[] data = line.split(" ");
name = data[0];
age = Integer.parseInt(data[1]);
  
this.pets.add(new Pet(name, age));
count++;
}
}while(!line.equalsIgnoreCase("done"));
System.out.println(count + " pets added.\n");
}
  
public void updatePet()
{
viewAllPets();
  
Scanner sc = new Scanner(System.in);
System.out.print("Enter the pet ID you can update: ");
int petId = Integer.parseInt(sc.nextLine().trim());
  
while(petId < 0 || petId > this.pets.size())
{
System.out.println("Please enter a valid et Id: ");
petId = Integer.parseInt(sc.nextLine().trim());
}
String oldName = this.pets.get(petId).getName();
int oldAge = this.pets.get(petId).getAge();
  
System.out.print("\nEnter new name and new age: ");
String line = sc.nextLine().trim();
String[] data = line.split(" ");
String name = data[0];
int age = Integer.parseInt(data[1]);
  
this.pets.get(petId).setName(name);
this.pets.get(petId).setAge(age);
  
System.out.println("\n" + oldName + " " + oldAge + " changed to "
+ this.pets.get(petId).getName() + " " + this.pets.get(petId).getAge() + "\n");
}
  
public void removePet()
{
viewAllPets();
  
Scanner sc = new Scanner(System.in);
System.out.print("Enter the pet ID to remove: ");
int petId = Integer.parseInt(sc.nextLine().trim());
  
while(petId < 0 || petId > this.pets.size())
{
System.out.println("Please enter a valid et Id: ");
petId = Integer.parseInt(sc.nextLine().trim());
}
String oldName = this.pets.get(petId).getName();
int oldAge = this.pets.get(petId).getAge();
  
this.pets.remove(petId);
System.out.println("\n" + oldName + " " + oldAge + " is removed.\n");
}
  
public void searchPetsByName()
{
Scanner sc = new Scanner(System.in);
System.out.print("\nEnter a name to search: ");
String nameSearch = sc.nextLine().trim();
ArrayList<Pet> tempPets = new ArrayList<>();
  
for(int i = 0; i < this.pets.size(); i++)
{
if(this.pets.get(i).getName().equalsIgnoreCase(nameSearch))
tempPets.add(this.pets.get(i));
}
if(tempPets.isEmpty())
System.out.println("\nNo pets with name " + nameSearch + " was found!\n");
else
{
System.out.printf("\n%3s %10s %4s\n", "ID", "Name", "Age");
for (Pet pet : tempPets) {
System.out.printf("%3d %10s %4d\n", pet.getId(), pet.getName(), pet.getAge());
}
System.out.println();
}
}
  
public void searchPetsByAge()
{
Scanner sc = new Scanner(System.in);
System.out.print("\nEnter age to search: ");
int ageSearch = Integer.parseInt(sc.nextLine().trim());
ArrayList<Pet> tempPets = new ArrayList<>();
  
for(int i = 0; i < this.pets.size(); i++)
{
if(this.pets.get(i).getAge() == ageSearch)
tempPets.add(this.pets.get(i));
}
if(tempPets.isEmpty())
System.out.println("\nNo pets with age " + ageSearch + " was found!\n");
else
{
System.out.printf("\n%3s %10s %4s\n", "ID", "Name", "Age");
for (Pet pet : tempPets) {
System.out.printf("%3d %10s %4d\n", pet.getId(), pet.getName(), pet.getAge());
}
System.out.println();
}
}
}

PetDBApp.java (Driver class)

import java.util.Scanner;

public class PetDBApp {
  
public static void main(String[] args)
{
System.out.println("Pet Database Program.");
  
Scanner sc = new Scanner(System.in);
PetDatabase petDB = new PetDatabase();
  
int choice;
do
{
printMenu();;
choice = Integer.parseInt(sc.nextLine().trim());
switch(choice)
{
case 1:
{
petDB.viewAllPets();
break;
}
case 2:
{
petDB.addMorePets();
break;
}
case 3:
{
petDB.updatePet();
break;
}
case 4:
{
petDB.removePet();
break;
}
case 5:
{
petDB.searchPetsByName();
break;
}
case 6:
{
petDB.searchPetsByAge();
break;
}
case 7:
{
System.out.println("Goodbye!");
System.exit(0);
}
default:
System.out.println("Invalid choice!");
}
}while(choice != 7);
}
  
private static void printMenu()
{
System.out.print("What would you like to do?\n"
+ "1. View all pets\n"
+ "2. Add more pets\n"
+ "3. Update an existing pet\n"
+ "4. Remove an existing pet\n"
+ "5. Search pets by name\n"
+ "6. Search pet by age\n"
+ "7. Exit\n"
+ "Your choice: ");
}
}

***************************************************************** SCREENSHOT **********************************************************