Week 8 - Book class with no Vector

Our Book class really models a specific title in the library. What would we do if we wanted to record the bar code numbers of each copy of that book?

public class Library {
    public static void main (String[] args) {
        Book b1 = new Book("Jurasic Park");
        b1.setBarCode("3423-0");
        System.out.println(b1);
        b1.setBarCode("3424-1");
        System.out.println(b1);
    }
}
class Book {
    // ... omitting the name and related methods

    private String title;
    private String barCode;

	public Book (String t) {
		title = t;
	}

    public void setBarCode (String code) {
        barCode = code;
    }
    public String toString () {
        String result = "Title: " + title;
        return result + " Code: " + barCode;
    }
}

Output

Title: Jurasic Park Code: 3423-0
Title: Jurasic Park Code: 3424-1