交作业。。
package practise;
import java.util.InputMismatchException;
import java.util.Scanner;
public class BorrowBook {
public static void main(String[] args) {
BorrowBook borrowBook=new BorrowBook();
borrowBook.borrow();
}
public void borrow() {
System.out.println("输入命令:1-按照名称查找图书；2-按照序号查找图书");
Scanner sc1=new Scanner(System.in);
try {
int num=sc1.nextInt();
if(num==1) {
bookname();
}else if(num==2) {
booknum();
}
sc1.close();
}catch(Exception e) {
System.out.println("命令输入错误，请根据提示输入数字命令!");
borrow();
}
}
public void bookname(){
String[] books= {"高数","数据结构"};
System.out.println("输入图书名称:");
Scanner sc1=new Scanner(System.in);
String str1=sc1.nextLine();
try {
for(int i=0;i<=books.length;i++) {
if(books[i].equals(str1)) {
System.out.println("book:"+str1);
break;
}
}
}catch(Exception e) {
System.out.println("图书不存在!");
borrow();
}
sc1.close();
}
public void booknum() {
String[] books= {"高数","数据结构"};
System.out.println("输入图书序号:");
Scanner sc1=new Scanner(System.in);
try {
int num=sc1.nextInt();
System.out.println("book:"+books[num-1]);
}catch(InputMismatchException e) {
System.out.println("命令输入错误，请根据提示输入数字命令!");
booknum();
}catch(Exception e) {
System.out.println("图书不存在!");
borrow();
}
sc1.close();
}
}
