Java入门第三季———图书借记系统

package com.imooc;
import java.util.Scanner;
//图书借记you异常
public class Demo06 {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根
        Book[] books={new Book(1,"Chinese"),new Book(2,"Math"),
                new Book(3,"English"),new Book(4,"java"),new Book(5,"C语言")};
        System.out.println("*****************图书借记系统*******************");
        Scanner input=new Scanner(System.in);
        int a=1;
        Demo06 dd=new Demo06();
        do{
            System.out.println("输入命令(1-按照书名查找  2-按照ID查找  3-退出):");
            int command=input.nextInt();
            switch(command){
            case 1:
                System.out.println("输入你要查找的图书的名字:");
                String name=input.next();
                dd.nameFind(name, books);
                break;
            case 2:
                System.out.println("输入你要查找到图书的ID:");
                int id=input.nextInt();
                dd.idFind(id, books);
                break;
            case 3:
                System.out.println("再见!");
                a=0;
                break;
            default:
                System.out.println("输入了错误的命令!");
            }
        }while(a==1);
        input.close();
    }
    public void nameFind(String name,Book[] books){
        try{
            int i;
            for(i=0;i<books.length;i++){
                if(name.equals(books[i].getName())){
                    break;
                }
            }
            System.out.println("你要查找的book:"+books[i].getName());
        }catch(Exception e){
            System.out.println("异常:根据书名,未找到图书信息!");
        }
    }
    public void idFind(int id,Book[] books){
        int i;
        try{
            for(i=0;i<books.length;i++){
                if(id==books[i].getId()){
                    break;
                }
            }
            System.out.println("你要查找的book:"+books[i].getName());
        }catch(Exception e){
            System.out.println("异常:根据图书ID,未找到图书信息!");
        }
    }
}