怎么用Java实现图书借阅系统

这篇文章主要介绍"怎么用Java实现图书借阅系统"，在日常操作中，相信很多人在怎么用Java实现图书借阅系统问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"怎么用Java实现图书借阅系统"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

需要实现的功能有：

• 判断用户是否需要进行借书

• 在用户选择借书时，展示出图书列表

• 图书列表包含 图书序号、图书名称、借阅价格、作者

• 用户选择借书数量、并选择对应图书、借阅天数

• 计算出用户需支付金额

Book.java

package com.imooc;/** * 图书类 包含图书序号 名称 价格 * */public class Book {    private int id;    private String name;    private double price;    private String author;    public Book(int id, String name, double price, String author) {        // TODO Auto-generated constructor stub        this.id = id;        this.setName(name);        this.price = price;        this.author = author;    }    public void setId(int id) {        this.id = id;    }    public int getId() {        return id;    }    public void setPrice(double price) {        this.price = price;    }    public double getPrice() {        return price;    }    public void setAuthor(String author) {        this.author = author;    }    public String getAuthor() {        return author;    }    public void setName(String name) {        this.name = name;    }    public String getName() {        return name;    }}

BorrowBooks.java

package com.imooc;import java.util.ArrayList;import java.util.List;import java.util.Scanner;public class BorrowBooks {    /**     * @param args     */    public static void main(String[] args) {        // TODO Auto-generated method stub        System.out.println("~~~~~~~欢迎使用图书借阅系统~~~~~~~~ ");        System.out.println("您是否要借书：1.是 >> 点击其他键退出");        BorrowBooks test = new BorrowBooks();        while (test.test1()) {            System.out.println(">>>您可选择图书及其价目表：");            System.out.println("-------------------------------------------");            Book[] books = { new Book(0, "红楼梦", 12, "曹雪芹"),                    new Book(1, "西游记", 12, "吴承恩"),                    new Book(2, "汉乡", 12, "孑与2"),                    new Book(3, "大魏宫廷", 12, "贱宗首席"),                    new Book(4, "三国演义", 12, "罗贯中"),                    new Book(5, "水浒传", 12, "施耐庵") };            System.out.println("序号" + "  " + "\t" + "书名" + "     " + "\t"                    + "租金" + "      " + "\t" + "作者");            for (Book book : books) {                if (book.getClass().equals(Book.class)) {                    System.out.println(book.getId() + "\t" + "\t"                            + book.getName() + "\t" + "\t" + book.getPrice()                            + "/天" + "\t" + "\t" + book.getAuthor() + "/著");                }            }            System.out.println("-------------------------------------------");            System.out.println("-->请输入你要借书的数量：");            Scanner zScanner = new Scanner(System.in);            int BookNum = zScanner.nextInt();            if (BookNum > 0) {                List bookList = new ArrayList();                int add = 0;                int bookPrice = 0;                for (int i = 0; i < BookNum; i++) {                    System.out.println(">>请输入第" + (i + 1) + "本书的序号：");                    int num = zScanner.nextInt();                    try {                        bookList.add(books[num]);                        System.out.println("----成功添加："                                + bookList.get(add).getName());                        if (books[num].getClass().equals(Book.class)) {                            bookPrice += ((Book) bookList.get(add)).getPrice();                        }                        add++;                    } catch (Exception e) {                        // TODO: handle exception                        System.out.println("您输入的图书序号不正确");                        i = i - 1;                        BookNum = BookNum;                    }                }                System.out.println("->请输入借阅的天数：");                Scanner g = new Scanner(System.in);                int bookDay = g.nextInt();                bookPrice = bookPrice * bookDay;                System.out.println("------------借阅选书完成------------" + "\n"                        + "下面开始统计数据..........");                System.out.print("您借阅的图书" + BookNum + "本：" + " ");                for (Book book : bookList) {                    System.out.println(book.getName() + " " + "\n");                }                System.out.println();                System.out.println("共租用：" + bookDay + " 天");                System.out.println("需要付款：" + bookPrice + " 元");                System.out.println("->请输入付款金额：");                System.out.println("------------");                Scanner x = new Scanner(System.in);                 int priceSpread = bookPrice - x.nextInt();//定义差价                 while (bookPrice != x.nextInt())                 System.out.println("------------" + "\n" + "输入错误，请重新输入金额！");                /*                 while (bookPrice != x.nextInt())                 {                 if (bookPrice > x.nextInt()) {             int priceSpread = bookPrice - x.nextInt();//定义差价                 System.out.println("------------" + "\n" + "您已付款"             + x.nextInt() + "元，还需支付" + priceSpread + "元");                 }             if (bookPrice 
运行效果图
存在问题
在BorrowBooks.java这个Class中，下面这段代码本想实现判断用户输入的金额是否和应付金额一致，不一致时给出不同的回复，但是自己试了好多种方法，都没有实现，还是自己懂得太少：
while (bookPrice != x.nextInt())       {        if (bookPrice > x.nextInt()) {        int priceSpread = bookPrice - x.nextInt();//定义差价        System.out.println("------------" + "\n" + "您已付款"        + x.nextInt() + "元，还需支付" + priceSpread + "元");        }        if (bookPrice 
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