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這篇文章主要介紹“怎么用Java實現圖書借閱系統”,在日常操作中,相信很多人在怎么用Java實現圖書借閱系統問題上存在疑惑,小編查閱了各式資料,整理出簡單好用的操作方法,希望對大家解答”怎么用Java實現圖書借閱系統”的疑惑有所幫助!接下來,請跟著小編一起來學習吧!
需要實現的功能有:
判斷用戶是否需要進行借書
在用戶選擇借書時,展示出圖書列表
圖書列表包含 圖書序號、圖書名稱、借閱價格、作者
用戶選擇借書數量、并選擇對應圖書、借閱天數
計算出用戶需支付金額
Book.java
package com.imooc; /** * 圖書類 包含圖書序號 名稱 價格 * */ 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("~~~~~~~歡迎使用圖書借閱系統~~~~~~~~ "); System.out.println("您是否要借書:1.是 >> 點擊其他鍵退出"); BorrowBooks test = new BorrowBooks(); while (test.test1()) { System.out.println(">>>您可選擇圖書及其價目表:"); System.out.println("-------------------------------------------"); Book[] books = { new Book(0, "紅樓夢", 12, "曹雪芹"), new Book(1, "西游記", 12, "吳承恩"), new Book(2, "漢鄉", 12, "孑與2"), new Book(3, "大魏宮廷", 12, "賤宗首席"), new Book(4, "三國演義", 12, "羅貫中"), new Book(5, "水滸傳", 12, "施耐庵") }; System.out.println("序號" + " " + "\t" + "書名" + " " + "\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("-->請輸入你要借書的數量:"); Scanner zScanner = new Scanner(System.in); int BookNum = zScanner.nextInt(); if (BookNum > 0) { List<Book> bookList = new ArrayList<Book>(); int add = 0; int bookPrice = 0; for (int i = 0; i < BookNum; i++) { System.out.println(">>請輸入第" + (i + 1) + "本書的序號:"); 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("您輸入的圖書序號不正確"); i = i - 1; BookNum = BookNum; } } System.out.println("->請輸入借閱的天數:"); Scanner g = new Scanner(System.in); int bookDay = g.nextInt(); bookPrice = bookPrice * bookDay; System.out.println("------------借閱選書完成------------" + "\n" + "下面開始統計數據.........."); System.out.print("您借閱的圖書" + 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("->請輸入付款金額:"); System.out.println("------------"); Scanner x = new Scanner(System.in); int priceSpread = bookPrice - x.nextInt();//定義差價 while (bookPrice != x.nextInt()) System.out.println("------------" + "\n" + "輸入錯誤,請重新輸入金額!"); /* while (bookPrice != x.nextInt()) { if (bookPrice > x.nextInt()) { int priceSpread = bookPrice - x.nextInt();//定義差價 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元,還需支付" + priceSpread + "元"); } if (bookPrice <x.nextInt()) { int priceSpread = x.nextInt()-bookPrice ;//定義差價 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元,找您" + priceSpread + "元"); } */ System.out.println("------------"); System.out.println(" 交易成功!"); System.out.println(); System.out.println("------------感謝您的使用--------------"); System.out.println("………………繼續借書請按1,退出請按其他鍵………………"); } else { System.out.println("您輸入的借書數量為“0”,自動為您退出系統"); System.exit(0); } } } private static Object bookPrice(int nextInt) { // TODO Auto-generated method stub return null; } // 捕獲輸入參數不正確異常 public boolean test1() { try { Scanner z = new Scanner(System.in); if (z.nextInt() == 1) { return true; } else { return false; } } catch (Exception e1) { return false; } } }
運行效果圖
存在問題
在BorrowBooks.java這個Class中,下面這段代碼本想實現判斷用戶輸入的金額是否和應付金額一致,不一致時給出不同的回復,但是自己試了好多種方法,都沒有實現,還是自己懂得太少:
while (bookPrice != x.nextInt()) { if (bookPrice > x.nextInt()) { int priceSpread = bookPrice - x.nextInt();//定義差價 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元,還需支付" + priceSpread + "元"); } if (bookPrice <x.nextInt()) { int priceSpread = x.nextInt()-bookPrice ;//定義差價 System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元,找您" + priceSpread + "元"); } }
到此,關于“怎么用Java實現圖書借閱系統”的學習就結束了,希望能夠解決大家的疑惑。理論與實踐的搭配能更好的幫助大家學習,快去試試吧!若想繼續學習更多相關知識,請繼續關注億速云網站,小編會繼續努力為大家帶來更多實用的文章!
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