Java |找不到符號|返回對象

Question

我遇到了返回已創建的對象書的問題，任何幫助將非常感激。該程序要求一本書，然後是作者，並將其存儲在一個對象（書）中。然後它被保存到一系列書籍中。

**import java.util.*; 
public class BookShop { 
    public static void main(String[] args) { 
     Scanner kybd = new Scanner(System.in); 
     book[] books = new book[10]; 

     for (int i = 0; i < books.length; i++){ 
      books[i] = getBook(kybd); 
     } 

     printBookDetails(books); 
    } 

    private static book getBook(Scanner kybd) { 
     System.out.print("What Is The Title Of The Next Book?:> "); 
     String title = kybd.nextLine(); 

     System.out.print("Who Is The Author Of The Next Book?:> "); 
     String author = kybd.nextLine(); 

     if(author == null){ 
      book definedBook = new book(); 
      definedBook.setTitle(title); 
     } 
     else{ 
      book definedBook = new book(); 
      definedBook.setTitle(title); 
      definedBook.setAuthor(author); 
     } 

     return definedBook; 

    } 

    private static void printBookDetails(book[] books) { 

    } 
}** 

Answer 1

而是在if/else語句，只是，如果喜歡把它定義之外定義的書對象：

book definedBook = new book(); 

if (..) { 
    //setter 
} else { 
    //setter 
    ... 
} 
return definedBook; 

Answer 2

移動的book的聲明，以便它的範圍，想

book definedBook = new book(); 
if (author == null){ 
    // book definedBook = new book(); 
    definedBook.setTitle(title); 
} else{ 
    // book definedBook = new book(); 
    definedBook.setTitle(title); 
    definedBook.setAuthor(author); 
}