LibraryItem is the superclass. Each LibraryItem has a unique serial number, a name, a type, and a loan_period. The type can be Movies or Books. Movie and Book are subclasses of LibraryItem. A novel is a subclass of Book. Loan period of 7 days for Movie, 14 days for Novel, and 30 days for Book. Skeleton codes are provided for LibraryItem, Book, Novel, and Movie.

I have completed the code for LibraryItem, Book, Movie, and Novel as shown below but I'm getting errors in LibraryDemo class (Which I have highlighted) which you can't modify. NEED HELP

LibraryItem

public abstract class LibraryItem { // None of the variables can be public private String name; private String type; private int loan_period; private int serial_number;

public LibraryItem(String name_, String type_) { this.name = name_; this.type = type_; } public abstract int getLoanPeriod(); // do not change this line public String getName() { return name; }

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

public String getType() { return type; }

public void setType(String type) { this.type = type; }

public int getLoan_period() { return loan_period; }

public void setLoan_period(int loan_period) { this.loan_period = loan_period; }

public int getSerial_number() { return serial_number; }

public void setSerial_number(int serial_number) { this.serial_number = serial_number; }

} Book

/** * Book should be a subclass of LibraryItem * * A book should have a loan_period of 30 days. */ public class Book extends LibraryItem {

public Book(String name_, String type_) { super(name_,type_); }

@Override public int getLoanPeriod() { return 30; }

@Override public String toString() { return "Book [getLoanPeriod()=" + getLoanPeriod() + ", getName()=" + getName() + ", getType()=" + getType() + ", getLoan_period()=" + getLoan_period() + ", getSerial_number()=" + getSerial_number() + ", getClass()=" + getClass() + ", hashCode()=" + hashCode() + ", toString()=" + super.toString() + "]"; } }

Movie

public class Movie extends LibraryItem{ public Movie(String name_, String type_) { super(name_, type_); }

@Override public String toString() { return "Movie [getLoanPeriod()=" + getLoanPeriod() + ", getName()=" + getName() + ", getType()=" + getType() + ", getLoan_period()=" + getLoan_period() + ", getSerial_number()=" + getSerial_number() + ", getClass()=" + getClass() + ", hashCode()=" + hashCode() + ", toString()=" + super.toString() + "]"; }

@Override public int getLoanPeriod() { return 7; } }

Novel

/** * Novel is a subclass of Book * A Novel should have a loan_period of 14 days * A Novel also has a variable of number_of_stars_rating */ public class Novel { private int number_of_stars_rating=0; private String name; private int loan_period=14; public Novel(String name) //this method sets name to the novel { this.name=name; } void set_star_ratings(int ratings) //this method sets ratings to the novel. { number_of_stars_rating=ratings; } public String toString() //this method returns name,ratings,loan_period. { String k; k=this.name+" "+ this.number_of_stars_rating+" "+this.loan_period; return k; } }

LibraryDemo

/** * This is a testing script. Do NOT modify the codes here. */ public class LibraryDemo { public static void main(String[] args) { LibraryItem[] lib = new LibraryItem[6]; lib[0] = new Book("Big Java"); lib[1] = new Movie("God Father"); Novel h = new Novel("Harry Potter"); h.set_star_ratings(5); lib[2] = h; Novel t = new Novel("To Kill a Mocking Bird"); t.set_star_ratings(3); lib[3] = t; lib[4] = new Movie("The ususal suspects"); lib[5] = new Book("Physics"); for ( int i = 0; i