打卡-交作业
package Demo;
import java.util.Scanner;
public class JieShu {
public static void main(String[] args) {
//System.out.println("*******欢迎来到慕课网借书系统*******");
JieShu test=new JieShu();
test.BorrowBook();
}
public void BorrowBook() {
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 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("命令输入错误！请根据提示输入数字命令");
BorrowBook();
}
}
public void MingCheng(){
System.out.println("输入图书名称：");
Scanner input1=new Scanner(System.in);
try{
String Bookname =input1.nextLine();
MingChengBook(Bookname);
}catch(Exception e){
System.out.println("命令输入错误！请根据提示输入数字命令");
BorrowBook();
}
}
public void XuHao(){
System.out.println("输入图书名序号：");
Scanner input2=new Scanner(System.in);
try{
int Booknum =input2.nextInt();
XuHaoBook(Booknum);
}catch(Exception e){
System.out.println("命令输入错误！请根据提示输入数字命令");
XuHao();
}
}
public void MingChengBook(String Bookname) {
String Books[]= {"数据结构","高数","java语言","英语"};
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("图书不存在!");
BorrowBook();
}
}
public void XuHaoBook(int Booknum) {
String Books[]= {"数据结构","高数","java语言","英语"};
try {
if(Booknum>0&&Booknum<=Books.length){
System.out.println("book:"+Books[Booknum-1]);
}else {
throw new Exception();
}
}catch(Exception e){
System.out.println("图书不存在!");
BorrowBook();
}
}
}
