我的代码如下:
int userId = 42;
String stringIdBook = "42";
User user = daoUser.getUser(userId);
List<Books> booksOrderedByUser = user.getBooks();
for (Books x : booksOrderedByUser) {
System.out.println(x.getTitle());
}
for (Books x : booksOrderedByUser) {
String idBookString = Inte
每个链接列表都有一个ISBN、作者名称、图书日期、图书价格,我正在尝试将整个图书目录(x许多书籍)保存为一个文件。他们说有个错误
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 21
at BookCatalog.SaveFile(BookCatalog.java:34)
at BookCatalogClient.menu(BookCatalogClient.java:167)
at BookCatalogClient.main(BookCatalogClient.java:25)
其中j
我正在学习Java,我继续学习这个例子
这是主要的
package bookstore;
public class BookStore {
public static void main(String[] args) {
// create a Book object
Book Java = new Book();
Book Python = new Book();
Book PHP = new Book();
Java.name = "Thinking In Java";