復(fù)制粘貼格式化，我還沒調(diào)試，如果有錯(cuò)誤可以回復(fù)分享一下。

package com.booksearch;

import java.util.*;

public class BookSearch {

public static void main(String[] args) {

String[] books = { "數(shù)據(jù)結(jié)構(gòu)", "高數(shù)", "論語" };

boolean flag = true;

while (flag) {

try {

System.out.println("輸入命令：1.按照名稱查圖書；2.按照序號(hào)查圖書");

Scanner input = new Scanner(System.in);

int cmdnum = input.nextInt();

if (cmdnum == 1) {

System.out.println("輸入圖書名稱：");

String name = input.next();

for (String book : books) {

if (book.equals(name)) {

System.out.println("book:" + book);

flag = false;

break;

}

}

if (flag) {

System.out.println("圖書不存在");

continue;

}

} else if (cmdnum == 2) {

System.out.println("輸入圖書序號(hào)：");

int id = input.nextInt();

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

if (id > 0 && id <= books.length) {

System.out.println("book:" + books[id - 1]);

flag = false;

break;

}

}

if (flag) {

System.out.println("圖書不存在");

continue;

}

}

} catch (Exception e) {

System.out.println("命令輸入錯(cuò)誤！請(qǐng)輸入數(shù)字命令！");

continue;

}

}

}

}