package?com.imooc;import?java.util.Scanner;?public?class?BorrowBook?{????String[]?shu={"高數","大學英語","計算機"};????Scanner?sc?=?new?Scanner(System.in);?public?void?test1(){????System.out.println("輸入命令1或2：1代表按照書名查找圖書；2代表按照序號查找圖書");}?public?void?test2()?throws?Exception{????test1();????int?a1=sc.nextInt();????if?(a1!=1||a1!=2){?????throw?new?Exception("命令輸入錯誤；請根據提示輸入數字命令！!");?????}???}public?void?test3()?{??try{??????test2();????}catch(Exception?e){????test3();}if(a1==1){????System.out.println("請輸入圖書名");????String?a2=sc.next();????for(int?i=0;i<3;i++){????????if(a2==shu[i])????????????System.out.println("book:"+a2);????}}????else?if(a1==2)????{????????System.out.println("請輸入圖書序號");????????int?b2=?sc.nextInt();????????for(int?i=0;i<3;i++){????????????if(b2==i)????????????????System.out.println("book:"+shu[i]);????}????System.out.println("圖書不存在");}}}