import java.util.List;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;

public class Book implements Comparable <Book>{
	private String title;
	private int pages;
	private double price;

	public Book(String title, int pages, double price) {
		super();
		setTitle(title);
		setPages(pages);
		setPrice(price);
	}
	

	@Override
	public String toString() {
		return "Book [title=" + title + ", pages=" + pages + ", price=" + price + "]";
	}


	public static void main(String[] args) {
		List<Book> lista = new ArrayList<Book>();
		Book[] books = { new Book("Z-Rambo", 1113, 25.56), new Book("Rocky", 999, 45.99),
				new Book("Transporter", 1234, 56.78) };
		lista.addAll(Arrays.asList(books));
		Collections.sort(lista);
		System.out.println("Sortowanie po tytule");
		for(Book el:lista){
			System.out.println(el);
		}
		System.out.println("------------");
		System.out.println("Sortowanie po ilości stron");
		Collections.sort(lista, new ComparatorPageCount());
		for(Book el:lista){
			System.out.println(el);
		}
		System.out.println("------------");
		System.out.println("Sortowanie po cenie");
		Collections.sort(lista, new ComparatorPrice());
		for(Book el:lista){
			System.out.println(el);
		}
	}


	public String getTitle() {
		return title;
	}


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


	public int getPages() {
		return pages;
	}


	public void setPages(int pages) {
		if (pages>0) this.pages = pages;
		else this.pages=0;
	}


	public double getPrice() {
		return price;
	}


	public void setPrice(double price) {
		if (price>0)this.price = price;
		else price=0;
	}


	@Override
	public int compareTo(Book book) {
		if (this.getTitle().compareTo(book.getTitle())<0) return -1;
		else if (this.getTitle().compareTo(book.getTitle())>0) return 1; 
		return 0;
	}

}


import java.util.Comparator;

public class ComparatorPageCount implements Comparator<Book> {

	@Override
	public int compare(Book book1, Book book2) {
		if (book1.getPages()<book2.getPages())
			return -1;
		else if (book1.getPages()>book2.getPages())
			return 1;
		return 0;
	}

}


import java.util.Comparator;

public class ComparatorPrice implements Comparator<Book> {

	@Override
	public int compare(Book book1, Book book2) {
		if (book1.getPrice()<book2.getPrice())
			return -1;
		else if (book1.getPrice()>book2.getPrice())
			return 1;
		return 0;
	}

}