package?library;
import?java.util.Scanner;
public?class?BorrowBook?{
public?static?void?main(String[]?args)?{
	int?choose;
	try{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");
	@SuppressWarnings("resource")
	Scanner?input?=?new?Scanner(System.in);
	choose?=?input.nextInt();
	if(choose!=1&&choose!=2)
		throw?new?Exception();
	}catch(Exception?e){
		System.out.println("命令輸入錯誤！請根據(jù)提示輸入數(shù)字命令！");
		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");
		@SuppressWarnings("resource")
		Scanner?input?=?new?Scanner(System.in);
		choose?=?input.nextInt();
	}
	if(choose==1){
		System.out.println("請輸入圖書名稱：");
		@SuppressWarnings("resource")
		Scanner?input?=?new?Scanner(System.in);
		String?bookName?=?input.nextLine();
		NameFind?find?=?new?NameFind();
		try?{
			find.find(bookName);
		}?catch(NameException?e){
			e.printStackTrace();
		}
		catch?(Exception?e)?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace();
		}
		}//if(choose==1)
	
?????if(choose==2){
????	?System.out.println("請輸入圖書序號：");
????	?@SuppressWarnings("resource")
		Scanner?input2?=?new?Scanner(System.in);
????	?int?bookNum?=?input2.nextInt();
????	?NumFind?find2?=?new?NumFind();
????	?try?{
			find2.find(bookNum);
		}?catch?(NameException?e)?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace();
		}catch?(Exception?e)?{
			//?TODO?Auto-generated?catch?block
			e.printStackTrace();
		}
?????}//if(choose2)
	
}//main
}//class



package?library;

public?class?NameFind?{
String[]?name?=?{"高數(shù)","數(shù)據(jù)結(jié)構(gòu)"};
public?void?find?(String?book)throws?NameException?{
	int?count=0;
	for(int?i=0;i<name.length;i++)
		if(book.equals(name[i]))
			System.out.println("book:"+name[i]);
		else?count++;
		if(count==name.length&&(!name[count].equals(book)))	
		????throw?new?NameException("圖書不存在");
??}//find
}//class



package?library;

public?class?NumFind?{
	String[]?name?=?{"高數(shù)","數(shù)據(jù)結(jié)構(gòu)"};
	int[]?num?=?{1,2};
	int?count?=??0;
	public?void?find(int?book)throws?NameException{
		for(int?i=0;i<num.length;i++)
			if(book==num[i]){
				System.out.println("book:"+name[i]);
			}else{
				count++;
			}
		if(count==name.length&&(num[count]!=book))	
			?throw?new?NameException("圖書不存在");
???????}
}




package?library;

public?class?NameException?extends?Exception{
public?NameException(){
	System.out.println("圖書不存在");
}
public?NameException(String?msg){
	super(msg);
}

}