Java入门第三季第一章课后练习-模拟借书系统

import java.util.Scanner;

public class SimulateLibrary {
    public String[][] Books = {{"1","十万个为什么"},{"2","Java语言程序设计"},{"3","JavaScript权威指南"},{"4","网页设计"}};

    public static void main(String[] args) {
        System.out.println("请输入你要搜索的方式：");
        System.out.println("1. 按照图书序号搜索");
        System.out.println("2. 按照书名搜索");
        SimulateLibrary SL = new SimulateLibrary();

        Scanner sc = new Scanner(System.in);
        int index = sc.nextInt();
        if(index == 1) {
            System.out.println("请输入图书序号");
            int BookIndex = sc.nextInt();
            SL.SearchByIndex(BookIndex);
        }else if(index == 2) {
            System.out.println("请输入图书全名");
            String BookName = sc.next(); 
            SL.SearchByBookName(BookName);
        }else {
            System.out.println("命令输入有误，请根据提示输入数字命令！");
        }
        sc.close();

    }

    public void SearchByIndex(int BookIndex) {
        BookIndex--;
        try {
            System.out.println("找到书本《"+Books[BookIndex][1]+"》");
        }catch(ArrayIndexOutOfBoundsException e){
            System.out.println("图书不存在");
        }catch(Exception e) {
            System.out.println("错误命令异常，请重新输入");
        }
    }
    public void SearchByBookName(String BookName) {
        String findBook = null;
        int BookNum = -1;
        for(int i=0;i<Books.length;i++) {
            if(Books[i][1].equals(BookName)) {
                findBook = Books[i][1];
                BookNum = i+1;
                break;
            }
        }
        if(BookNum!=-1) {
            System.out.println("找到书本《"+findBook+"》，图书序号"+BookNum);
        }else {
            System.out.println("图书不存在");
        }
    }
}