//若是按書名查找編寫其實現(xiàn)的方法

private static String bookname() //為啥在這一行總是提示該方法要返回一個字符型

{ ?//拋出異常必須引用 ?throws ?Exception

String name1;

String[] books ={"高數(shù)","語文 ","數(shù)學","政治","地理","匯編語言","C語言","遙感"};

name1 = con1.next(); //獲取輸入的字符型

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

if (books[i].equals(name1)){//判斷如果兩個字符串相等

return books[i];

}

}

//throw ?new Exception("圖書不存在！");

}