图书管理系统（基础）

import java.util.Arrays;
import java.util.Scanner;

public class ArrayBook2 {
    public static void main(String[] args) {
        //扫描仪
        Scanner scanner = new Scanner(System.in);
        //图书名称
        String[] bookNames = {"《西游记》", "《红楼梦》", "《水浒传》", "《三国演义》"};
        //图书作者
        String[] bookAuthor = {"吴承恩", "曹雪芹", "施耐庵", "罗贯中"};
        //图书价格
        float[] bookPrice = {100, 80, 90, 101};
        boolean b = true;
        while (b) {
            System.out.println("*******************欢迎使用XXX图书管理系统*******************");
            System.out.println("\t\t1、添加图书");
            System.out.println("\t\t2、修改图书");
            System.out.println("\t\t3、删除图书");
            System.out.println("\t\t4、查看图书");
            System.out.println("\t\t0、退出系统");
            System.out.println("请选择：");
            int choose = scanner.nextInt();
            switch (choose) {
                case 1:
                    System.out.println("图书管理系统>>>添加图书");
                    while (true) {
                        System.out.println("请输入添加的图书名称：");
                        String inputName = scanner.next();
                        System.out.println("请输入" + inputName + "的作者");
                        String inputAuthor = scanner.next();
                        System.out.println("请输入" + inputName + "的价格");
                        float inputPrice = scanner.nextFloat();
                        //先扩容
                        bookNames = Arrays.copyOf(bookNames, bookNames.length + 1);
                        bookAuthor = Arrays.copyOf(bookAuthor, bookAuthor.length + 1);
                        bookPrice = Arrays.copyOf(bookPrice, bookPrice.length + 1);
                        //将新的图书存入到最后一个位置
                        bookNames[bookNames.length - 1] = inputName;
                        bookAuthor[bookAuthor.length - 1] = inputAuthor;
                        bookPrice[bookPrice.length - 1] = inputPrice;
                        System.out.println("[添加图书成功！]");
                        //是否继续
                        System.out.println("是否继续添加？（Y/N）");
                        String isContinue = scanner.next();
                        if ("n".equals(isContinue) || "N".equals(isContinue)) {
                            break;
                        }
                    }
                    break;
                case 2:
                    System.out.println("图书管理系统>>>修改图书");
                    System.out.println("请输入要修改的图书名称：");
                    String inputUpdateName = scanner.next();
                    //根据图书名称查找对应的索引
                    int index = -1;
                    for (int i = 0; i < bookNames.length; i++) {
                        if (inputUpdateName.equals(bookNames[i])) {
                            index = i;
                            break;
                        }
                    }
                    //先判断
                    if (index == -1) {
                        System.out.println("[修改失败，该图书不存在！]");
                    } else {
                        //将输入新的图书信息覆盖原有的信息
                        System.out.println("原图书名称：" + bookNames[index] + "\t请输入新的图书名称：");
                        bookNames[index] = scanner.next();
                        System.out.println("原图书作者：" + bookAuthor[index] + "\t请输入新的图书作者：");
                        bookAuthor[index] = scanner.next();
                        System.out.println("原图书价格：" + bookPrice[index] + "\t请输入新的图书价格：");
                        bookPrice[index] = scanner.nextFloat();
                        System.out.println("[修改图书成功！]");
                    }
                    break;
                case 3:
                    System.out.println("图书管理系统>>>删除图书");
                    System.out.println("请输入要删除的图书名称：");
                    String inputDeleteName = scanner.next();
                    //根据图书名称查找对应的索引
                    int deleteIndex = -1;
                    for (int i = 0; i < bookNames.length; i++) {
                        if (inputDeleteName.equals(bookNames[i])) {
                            deleteIndex = i;
                        }
                    }
                    //先判断
                    if (deleteIndex == -1) {
                        System.out.println("[删除失败，该图书不存在！]");
                    } else {
                        //循环覆盖
                        for (int i = deleteIndex; i < bookNames.length - 1; i++) {
                            //将后一个元素覆盖前一个
                            bookNames[i] = bookNames[i + 1];
                            bookAuthor[i] = bookAuthor[i + 1];
                            bookPrice[i] = bookPrice[i + 1];
                        }
                        //缩容
                        bookNames = Arrays.copyOf(bookNames, bookNames.length - 1);
                        bookAuthor = Arrays.copyOf(bookAuthor, bookAuthor.length - 1);
                        bookPrice = Arrays.copyOf(bookPrice, bookPrice.length - 1);
                        System.out.println("[删除图书成功！]");
                    }
                    break;
                case 4:
                    System.out.println("图书管理系统>>>查看图书");
                    System.out.println("序号\t图书名称\t作者\t价格");
                    for (int i = 0; i < bookNames.length; i++) {
                        System.out.println((i + 1) + "\t" + bookNames[i] + "\t" + bookAuthor[i] + "\t" + bookPrice[i]);
                    }
                    break;
                case 0:
                    System.out.println("[谢谢使用，系统已退出！]");
                    b = false;
                    break;
            }
        }
    }
}