java - 迭代器找不到符号方法 add()

Question

我正在尝试迭代数组列表并根据特定条件将新书籍(自定义类)添加到列表中。我的 addBook 函数如下。 bookIter.add() 行给了我错误:“找不到符号方法 add(Book)”。任何帮助将不胜感激。

谢谢

public void addBook(String title, String authors, String publisher, int year) {
    Iterator<Book> bookIter;
    bookIter = this.books.iterator();

    if (this.books.isEmpty()) {
        this.books.add(new Book(title, authors, publisher, year));
        System.out.println(this.books.toString());
    } else {
        while (bookIter.hasNext()) {
            Book book = bookIter.next();
            if (book.getYear() == year) {
                System.out.println("Duplicate Years. Please try again.");
            } else {
                bookIter.add(new Book(title, authors, publisher, year));
                System.out.println(this.books.toString());
            }
        }
    }

}

Answer 1

Iterator 不包含 add() 方法，ListIterator 包含。

尝试将其更改为:

ListIterator<Book> bookIter;
bookIter = this.books.listIterator();