Book.java

public class Book {

    private int id;
    private String title;
    private String author;
    private boolean available;


    public Book(int id, String title, String author, boolean available){
        this.id = id;
        this.title = title;
        this.author = author;
        this.available = available;
    }

    public int getId(){
        return id;
    }

    public String getTitle(){
        return title;
    }

    public String getAuthor(){
        return author;
    }

    public boolean isAvailable(){
        return available;
    }

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

    public void setTitle(String title){
        this.title = title;
    }

    public void setAuthor(String author){
        this.author = author;
    }

    public void setAvailable(Boolean available){
        this.available = available;
    }

    @Override
    public String toString(){
        return "Book{" + "id=" + id + ", title=" + title +
                ", author=" + author + ", available=" + available + "}";
    }


}