The `Author` class

Similar to the Book class, we need an Author class too. Place Author.java in the same model package:

package model;

import java.util.Objects;

public class Author {
    
    private String name;
    private int numOfBooks;
    private String nationality;

    public Author(String name, int numOfBooks, String nationality) {
        this.name = name;
        this.numOfBooks = numOfBooks;
        this.nationality = nationality;
    }

    public String getName() {
        return name;
    }

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

    public int getNumOfBooks() {
        return numOfBooks;
    }

    public void setNumOfBooks(int numOfBooks) {
        this.numOfBooks = numOfBooks;
    }

    public String getNationality() {
        return nationality;
    }

    public void setNationality(String nationality) {
        this.nationality = nationality;
    }

    @Override
    public String toString() {
        return "Author{
                name='" + name + '\'' +
                ", numOfBooks=" + numOfBooks +
                ", nationality='" + nationality + '\'' +
                '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Author author = (Author) o;
        return  numOfBooks == author.numOfBooks &&
                name.equals(author.name) &&
                nationality.equals(author.nationality);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, numOfBooks, nationality);
    }
}

As you can see, an author has three fields: name, numOfBooks, and nationality; all the other instance member methods can be generated automatically by IntelliJ (custom constructor, setters & getters, toString, equals and hashCode).

The Author class#

The `Author` class