package problem_10;
//Bag.java
import java.util.*;

//書包類
public class Bag {
	private TreeSet<Book> booklist;		//圖書列表，用于有序存放圖書
	
	public Bag(){
		booklist = new TreeSet<Book>(new SetComparator());
	}
	
	//向書包的圖書列表中添加一本書
	public void add(Book book){
		booklist.add(book);
	}
	
	//從書包的圖書列表中刪除一本書
	public void remove(Book book){
		booklist.remove(book);
	}
	
	//返回圖書列表
	public TreeSet<Book> getBooklist(){
		return booklist;
	} 
}