java - 在java中将一本书的多个值添加到ArrayList中

Question

我对如何将多个值添加到数组列表中有点困惑。

我想做的是将 1 个对象的多个值添加到数组列表中。

例如:

我有一个名为 books 的数组列表，我正在尝试添加一本书及其标题、作者、出版年份等...

这是我尝试过的地方，但我不确定它是否正确或是否有更简单的方法。

public class Book {

    public static ArrayList<Book> Books = new ArrayList<>();

    public int isbn;
    public int yearPublished;
    public String title;
    public String author;
    public String price;
    public int noOfCopies;

  Book b1 = new Book(1234, 1991, "Book1", "mark.mark", "£11.00", 5);
  Book b2 = new Book(4321, 1994, "Book2", "bob.bob", "£12.00", 3);



    public Book(int ISBN, int year, String ttle, String auth, String pri, int copies) {

        this.isbn = ISBN;
        this.yearPublished = year;
        this.title = ttle;
        this.author = auth;
        this.price = pri;
        this.noOfCopies = copies;

        Books.add(this);
    }
}

这是对的吗？有人可以帮我吗

Answer 1

你必须安排你的代码:

// Class Definition
public class Book {
    // Member Variables
    public int isbn;
    public int yearPublished;
    public String title;
    public String author;
    public String price;
    public int noOfCopies;

    // Constructor
    public Book(int ISBN, int year, String ttle, String auth, String pri, int copies) {

        this.isbn = ISBN;
        this.yearPublished = year;
        this.title = ttle;
        this.author = auth;
        this.price = pri;
        this.noOfCopies = copies;
    }

    // Create a List of Books
    public static List<Book> getBooks() {
        Book b1 = new Book(1234, 1991, "Book1", "mark.mark", "£11.00", 5);
        Book b2 = new Book(4321, 1994, "Book2", "bob.bob", "£12.00", 3);
        List<Book> books = new ArrayList<Book>();
        books.add(b1);
        books.add(b2);
        return books;
    }
}

之后，您可以通过调用 getBooks() 函数来获取示例书籍:

List<Book> exampleBooks = Book.getBooks();