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這篇文章主要介紹“怎么用Java實(shí)現(xiàn)圖書借閱系統(tǒng)”,在日常操作中,相信很多人在怎么用Java實(shí)現(xiàn)圖書借閱系統(tǒng)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(duì)大家解答”怎么用Java實(shí)現(xiàn)圖書借閱系統(tǒng)”的疑惑有所幫助!接下來,請(qǐng)跟著小編一起來學(xué)習(xí)吧!
需要實(shí)現(xiàn)的功能有:
判斷用戶是否需要進(jìn)行借書
在用戶選擇借書時(shí),展示出圖書列表
圖書列表包含 圖書序號(hào)、圖書名稱、借閱價(jià)格、作者
用戶選擇借書數(shù)量、并選擇對(duì)應(yīng)圖書、借閱天數(shù)
計(jì)算出用戶需支付金額
Book.java
package com.imooc; /** * 圖書類 包含圖書序號(hào) 名稱 價(jià)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(tǒng)~~~~~~~~ "); System.out.println("您是否要借書:1.是 >> 點(diǎn)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(jià)目表:"); System.out.println("-------------------------------------------"); Book[] books = { new Book(0, "紅樓夢(mèng)", 12, "曹雪芹"), new Book(1, "西游記", 12, "吳承恩"), new Book(2, "漢鄉(xiāng)", 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(hào)" + " " + "\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(qǐng)輸入你要借書的數(shù)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(qǐng)輸入第" + (i + 1) + "本書的序號(hào):"); 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(hào)不正確"); i = i - 1; BookNum = BookNum; } } System.out.println("->請(qǐng)輸入借閱的天數(shù):"); 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(tǒng)計(jì)數(shù)據(jù).........."); 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(qǐng)輸入付款金額:"); System.out.println("------------"); Scanner x = new Scanner(System.in); int priceSpread = bookPrice - x.nextInt();//定義差價(jià) while (bookPrice != x.nextInt()) System.out.println("------------" + "\n" + "輸入錯(cuò)誤,請(qǐng)重新輸入金額!"); /* while (bookPrice != x.nextInt()) { if (bookPrice > x.nextInt()) { int priceSpread = bookPrice - x.nextInt();//定義差價(jià) 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(jià) 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(xù)借書請(qǐng)按1,退出請(qǐng)按其他鍵………………"); } else { System.out.println("您輸入的借書數(shù)量為“0”,自動(dòng)為您退出系統(tǒng)"); System.exit(0); } } } private static Object bookPrice(int nextInt) { // TODO Auto-generated method stub return null; } // 捕獲輸入?yún)?shù)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(yùn)行效果圖
存在問題
在BorrowBooks.java這個(gè)Class中,下面這段代碼本想實(shí)現(xiàn)判斷用戶輸入的金額是否和應(yīng)付金額一致,不一致時(shí)給出不同的回復(fù),但是自己試了好多種方法,都沒有實(shí)現(xiàn),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(jià) 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(jià) System.out.println("------------" + "\n" + "您已付款" + x.nextInt() + "元,找您" + priceSpread + "元"); } }
到此,關(guān)于“怎么用Java實(shí)現(xiàn)圖書借閱系統(tǒng)”的學(xué)習(xí)就結(jié)束了,希望能夠解決大家的疑惑。理論與實(shí)踐的搭配能更好的幫助大家學(xué)習(xí),快去試試吧!若想繼續(xù)學(xué)習(xí)更多相關(guān)知識(shí),請(qǐng)繼續(xù)關(guān)注億速云網(wǎng)站,小編會(huì)繼續(xù)努力為大家?guī)砀鄬?shí)用的文章!
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