import?java.util.Scanner;

public?class?Library?{

????public?String[]?books?=?{"數學","語文","物理","英語","化學","體育"};

????public?static?void?main(String[]?args){
????????Library?lb?=?new?Library();
????????lb.book();
????}
????
????/**
?????*?顯示圖書館的操作命令
?????*?根據輸入的值，執行相應的操作
?????*/
????public?void?book(){
????????System.out.println("歡迎進入圖書館借書系統");
????????System.out.println("1-按照名稱查詢圖書;2-按照序號查詢圖書");
????????try?{
????????????@SuppressWarnings("resource")
????????????Scanner?k?=?new?Scanner(System.in);//掃描控制臺輸入的值
????????????int?number?=?k.nextInt();//nextInt()方法會讀取下一個int型標志的token.但是焦點不會移動到下一行，仍然處在這一行上。
????????????switch?(number)?{
????????????case?1:
????????????????find1();
????????????????break;
????????????case?2:
????????????????find2();
????????????????break;
????????????default:
????????????????System.out.println("請按要求輸出值");
????????????????break;
????????????}
????????}?catch?(Exception?e)?{
????????????System.out.println("請輸入正確數值");
????????????book();
????????}
????}
????
????/**
?????*?圖書館書名查詢
?????*/
????@SuppressWarnings("resource")
????public?void?find1(){
????????System.out.println("歡迎進入圖書館書名查詢系統,請輸入書名：");
????????try?{
????????????Scanner?k?=?new?Scanner(System.in);
????????????String?name?=?k.next();
????????????switch(name){
????????????case?"數學":
????????????????System.out.println("已查詢到您所需的圖書:"+name);
????????????????break;
????????????case?"語文":
????????????????System.out.println("已查詢到您所需的圖書:"+name);
????????????????break;
????????????case?"物理":
????????????????System.out.println("已查詢到您所需的圖書:"+name);
????????????????break;
????????????case?"英語":
????????????????System.out.println("已查詢到您所需的圖書:"+name);
????????????????break;
????????????case?"化學":
????????????????System.out.println("已查詢到您所需的圖書:"+name);
????????????????break;
????????????case?"體育":
????????????????System.out.println("已查詢到您所需的圖書:"+name);
????????????????break;
????????????default:
????????????????System.out.println("非常抱歉！暫未查詢出您所需的圖書。");
????????????????break;
????????????}
????????}?catch?(RuntimeException?e)?{
????????????System.out.println("您輸入有誤，請重新輸入！");
????????}finally{
????????????System.out.println("是否繼續查詢(Y/N);N-返回借書系統");
????????????Scanner?k1?=?new?Scanner(System.in);
????????????String?n1?=?k1.nextLine();
????????????if(n1.equals("Y")||n1.equals("y")){
????????????????find1();
????????????}else{
????????????????book();
????????????}
????????}
????}
????
????/**
?????*?圖書館圖書序列號查詢
?????*/
????@SuppressWarnings("resource")
????public?void?find2(){
????????System.out.println("請輸入所需查找的圖書序列號：");
????????try?{
????????????Scanner?k?=?new?Scanner(System.in);
????????????int?number?=?k.nextInt();
????????????if(number?<=?books.length-1){
????????????????System.out.println("查詢出的圖書為："+books[number-1]);
????????????}else{
????????????????System.out.println("您查找的書不存在！");
????????????}
????????}?catch?(Exception?e)?{
????????????System.out.println("您輸入有誤！");
????????}finally{
????????????System.out.println("是否繼續查詢(Y/N)");
????????????Scanner?k2?=?new?Scanner(System.in);
????????????String?n2?=?k2.nextLine();
????????????if(n2.equals("Y")||n2.equals("y")){
????????????????find2();
????????????}else{
????????????????book();
????????????}
????????}
????}
}