ContactBook.java

// ContactBook.java
import java.util.ArrayList;
import java.util.List;

public class ContactBook {
    private List<Contact> contacts;

    public ContactBook() {
        this.contacts = new ArrayList<>();
    }

    public void addContact(String name, String phoneNumber, String email) {
        Contact contact = new Contact(name, phoneNumber, email);
        contacts.add(contact);
        System.out.println("Contact added successfully.");
    }

    public void viewContacts() {
        if (contacts.isEmpty()) {
            System.out.println("Contact book is empty.");
        } else {
            System.out.println("Contact List:");
            for (int i = 0; i < contacts.size(); i++) {
                Contact contact = contacts.get(i);
                System.out.println((i + 1) + ". Name: " + contact.getName() +
                        ", Phone: " + contact.getPhoneNumber() +
                        ", Email: " + contact.getEmail());
            }
        }
    }

    public void editContact(int index, String name, String phoneNumber, String email) {
        if (index >= 0 && index < contacts.size()) {
            Contact contact = contacts.get(index);
            contact.setName(name);
            contact.setPhoneNumber(phoneNumber);
            contact.setEmail(email);
            System.out.println("Contact updated successfully.");
        } else {
            System.out.println("Invalid contact index.");
        }
    }

    public void deleteContact(int index) {
        if (index >= 0 && index < contacts.size()) {
            Contact contact = contacts.remove(index);
            System.out.println("Contact deleted: " + contact.getName());
        } else {
            System.out.println("Invalid contact index.");
        }
    }
}