package?com.imooc.test;
//import?java.util.InputMismatchException;
import?java.util.Scanner;
public?class?LibrarySystem?{
?public?static?void?main(String[]?args)?{
??//?TODO?Auto-generated?method?stub
??String[]?bookName={"高數","線代","思修","信號與系統"};
??while(true){
???Scanner?input=new?Scanner(System.in);//創建Scanner對象
???System.out.println("歡迎來到圖書管理系統！");
??????System.out.println("輸入命令：1-按照名稱查找圖書；2-按照序號查找圖書");
?????try{?
???int?cmd=input.nextInt();
??????String?book;
??????switch(cmd){
??????case?1:
????????System.out.println("請輸入圖書名稱：");
????????book=?bookname(bookName);?
????????System.out.println("book:"+book);
????????break;
??????case?2:
????????System.out.println("請輸入圖書序號：");
????????book=?booknum(bookName);?
????????System.out.println("book:"+book);
????????break;
??????}
??
???}catch?(Exception?e){
????System.out.println("圖書不存在！");????
???????????
???}
??}
?}
?
public?static?String?bookname(String[]?book)throws?Exception{
?Scanner?input=new?Scanner(System.in);//創建Scanner對象
?//?System.out.println("輸入圖書名稱：");
??String?cmd1=input.next();
?????for(int?i=0;i<book.length;i++){
???if(cmd1.equals(book[i]))
??????return?book[i];
?????}
???throw?new?Exception("圖書不存在！");
??
}

???
public?static?String?booknum(String[]?book)throws?Exception{
?Scanner?input=new?Scanner(System.in);//創建Scanner對象
??//System.out.println("輸入圖書序號：");
???int?cmd2=input.nextInt();
???if((cmd2>=0)&&(cmd2<book.length)){???
????????????return?book[cmd2];
??????????}
????throw?new?Exception("圖書不存在！");}?
??}