集合练习题 0111

1.程序设计：图书管理器，设计一个图书管理器，实现对图
书进行的存储管理操作，实现功能，
1.添加一本图书（书名、作者（姓名，年龄，性别）、售价）
2.删除一本图书（通过书名删除）
3.删除所有的指定作者的书（通过作者姓名删除）
4.将所有的图书按照图书售价降序排序。若售价相同，按
照作者年龄升序）

public class Book implements Comparable<Book> {
     
	private String bookname;
	private Author author;
	private int price;	
	public Book(String bookname, Author author, int price) {
     
		super();
		this.bookname = bookname;
		this.author = author;
		this.price = price;
	}
	public Book() {
     
		super();		
	}
public String getBookname() {
     
		return bookname;
	}
	public void setBookname(String bookname) {
     
		this.bookname = bookname;
	}
	public Author getAuthor() {
     
		return author;
	}
	public void setAuthor(Author author) {
     
		this.author = author;
	}
	public int getPrice() {
     
		return price;
	}
	public void setPrice(int price) {
     
		this.price = price;
	}
	@Override
	public String toString() {
     
		return "Book [bookname=" + bookname + ", author=" + author + ", price=" + price + "]";
	}
	@Override
	public int compareTo(Book o) {
     
			if(this.price>o.price) {
     
				return -1;
			}else if (this.price<o.price) {
     
				return 1;
			}else {
     
				int num = this.author.compareTo(o.author);
				return num;
			}	
}
}
public class Author implements Comparable<Author>{
     
	private String name;
	private int age;
	private String gender;
	public Author(String name, int age, String gender) {
     
		super();
		this.name = name;
		this.age = age;
		this.gender = gender;
	}
	public Author() {
     
		super();		
	}
	public String getName() {
     
		return name;
	}
	public void setName(String name) {
     
		this.name = name;
	}
	public int getAge() {
     
		return age;
	}
	public void setAge(int age) {
     
		this.age = age;
	}
	public String getGender() {
     
		return gender;
	}
	public void setGender(String gender) {
     
		this.gender = gender;
	}
	@Override
	public String toString() {
     
		return "Author [name=" + name + ", age=" + age + ", gender=" + gender + "]";
	}
	@Override
	public int compareTo(Author o) {
     
		if(this.age>o.age) {
     
			return 1;
		}else if (this.age<o.age) {
     
			return -1;
		}
		return 0;
	}
}
import java.util.Iterator;
import java.util.TreeSet;
public class Test3 {
     
	public static void main(String[] args) {
     
		TreeSet<Book> set = new TreeSet<>();
		set.add(new Book("西游记", new Author("吴承恩", 40, "男"), 100));
		set.add(new Book("红楼梦", new Author("曹雪芹", 30, "男"), 100));
		set.add(new Book("水浒传", new Author("施耐庵", 40, "男"), 200));
		set.add(new Book("三国演义", new Author("罗贯中", 50, "男"), 200));		
		Iterator<Book> iterator = set.iterator();
		while (iterator.hasNext()) {
     
			Book book = iterator.next();
			if("西游记".equals(book.getBookname())){
     
				iterator.remove();
			}
		}
		for (Book book : set) {
     
			System.out.println(book);
		}		
	}		
}