CUMT-----Java课后第八章编程作业

文章目录

• • [1. 题目描述](#1. 题目描述)
  • [2. 代码编写](#2. 代码编写)
  • [3. 运行截图](#3. 运行截图)

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1. 题目描述

(1)定义一个Book类并能根据价格进行比较。(2)创建一个泛型集合存放图书，对图书进行排序并输出。

2. 代码编写

package CumtJava;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
class Book implements Comparable<Book> {
    private String title;
    private double price;

    public Book(String title, double price) {
        this.title = title;
        this.price = price;
    }

    public String getTitle() {
        return title;
    }

    public double getPrice() {
        return price;
    }

    @Override
    public int compareTo(Book other) {
        // 对价格进行比较，实现降序排序（从高到低）
        if (this.price > other.price) {
            return -1;
        }
        else if (this.price < other.price) {
            return 1;
        }
        else {
            return 0;
        }
    }
}

package CumtJava;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class BookSortExample {
    public static void main(String[] args) {
        List<Book> books = new ArrayList<>(); //集合
        books.add(new Book("Book1", 25.0));
        books.add(new Book("Book2", 15.0));
        books.add(new Book("Book3", 30.0));
        books.add(new Book("Book4", 20.0));

        // 对图书列表进行排序
        Collections.sort(books);

        // 输出排序后的图书列表
        for (Book book : books) {
            System.out.println("Title: " + book.getTitle() + ", Price: " + book.getPrice());
        }
    }
}

3. 运行截图