package Demo;

import java.util.Scanner;

public class JieShu {

public static void main(String[] args) {

//System.out.println("*******歡迎來到慕課網借書系統*******");

JieShu test=new JieShu();

test.BorrowBook();

}

public? void BorrowBook() {

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");

Scanner input=new Scanner(System.in);

try {

int num=input.nextInt();

if(num==1) {

MingCheng();

}else if(num==2) {

XuHao();

}

}catch(Exception e) {

System.out.println("命令輸入錯誤！請根據提示輸入數字命令");

BorrowBook();

}

}

public void MingCheng(){

System.out.println("輸入圖書名稱：");

Scanner input1=new Scanner(System.in);

try{

String Bookname =input1.nextLine();

MingChengBook(Bookname);

}catch(Exception e){

System.out.println("命令輸入錯誤！請根據提示輸入數字命令");

BorrowBook();

}

}

public void XuHao(){

System.out.println("輸入圖書名序號：");

Scanner input2=new Scanner(System.in);

try{

int Booknum =input2.nextInt();

XuHaoBook(Booknum);

}catch(Exception e){

System.out.println("命令輸入錯誤！請根據提示輸入數字命令");

XuHao();

}

}

public void MingChengBook(String Bookname) {

String Books[]= {"數據結構","高數","java語言","英語"};

try {

int a=-1;

for(int i=0;i<Books.length;i++) {

if(Books[i].equals(Bookname)) {

System.out.println("book:"+Books[i]);

a=1;

}

}

if(a==-1) {

throw new Exception();

}

}catch(Exception e){

System.out.println("圖書不存在!");

BorrowBook();

}??

}

public void XuHaoBook(int Booknum) {

String Books[]= {"數據結構","高數","java語言","英語"};

try {

if(Booknum>0&&Booknum<=Books.length){

System.out.println("book:"+Books[Booknum-1]);

}else {

throw new Exception();

}

}catch(Exception e){

System.out.println("圖書不存在!");

BorrowBook();

}

}

}