Create a new version of paste:

public class InheritanceIntro {

	public static void main(String[] args) {
		Book a = new Book("David Copperfield", "Charles Dickens",800);
		System.out.println(a);
		System.out.println(a.getAuthor());
		System.out.println(a.isLong());
		Book b= new Book("The Cat in the Hat", "Dr.Seuss", 28);
		System.out.println(b.isLong());
		LibraryBook c= new LibraryBook("It", "Stephen King",1050,"kin it");
		System.out.println(c.getTitle());
		Book d = new LibraryBook();
		//LibraryBook e = new Book();
		System.out.println(c);
		d.setTitle("Moby Dick");
		System.out.println(d.getTitle());
		Ebook f = new Ebook("Less Than Zero","Bret Easton Ellis", 470);
		for (int i=1; i<f.getPages();i++) {
			f.turnPage();
		}
		System.out.println(f.page);
		

	}

}
class Book{
	// instance variables or data fields
	private String title;
	private String author;
	private int pages;
	
	public Book() {
		
	}
	public Book(String title, String author,int pages) {
		this.title =title;
		this.author=author;
		this.pages=pages;
	}
	public String getTitle() {
		return title;
	}
	public String getAuthor() {
		return author;
	}
	public int getPages(){
		return pages;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public void setAuthor(String author) {
		this.author=  author;
	}
	public void setPages(int pages) {
		this.pages = pages;
	}
	public boolean isLong() {
		if (pages >= 500)
			return true;
		else
			return false;
	}
	public String toString() {
		return title + " by author "+ author + " is "+ pages +" pages";
	}
}
class LibraryBook extends Book{
	private String callNumber;
    private String isPresent;
	
	public LibraryBook() {
		super();
  	    isPresent = true;
	}
	public LibraryBook(String title, String author,int pages, String callNumber) {
		super(title, author, pages);
		this.callNumber = callNumber;
        isPresent = true;
	}
    public void checkedOut() {
	    isPresent = false;
    }
    public void checkedIn() {
	    isPresent = true;
    }
	public String toString() {
		if(checkedIn)
		return super.toString() + " \n with call number "+ callNumber + ".  The book is in the library.";
		return super.toString() + " \n with call number "+ callNumber + ".  The book is checked out.";
	}
	}
	class Ebook extends Book{
		private int page = 1;
		public Ebook() {
			super();
		}
		public Ebook(String title, String author, int pages) {
			super(title, author, pages);
			
		}
		public void turnPage() {
			if (page == getPages())
				page = 1;
			else
			page++;
		}
		public void turnBack() {
			if (page == 1) {
				}
			else
			page--;
		}
		
	}