java - 尝试从 arraylist 打印方法

Question

我正在尝试使用库类中的数组打印成员类的标题
公共(public)课书给了我这个错误: http://screencast.com/t/tqpJp2BF8sH

       {
    // instance variables - replace the example below with your own
    private int x;
    private Integer bookid;
    private String author;
    private String title;
    private String ficornonfic;

    /**
     * Constructor for objects of class Book
     */
    public Book(Integer bookID, String Author, String Title, String FictionORnonfiction  )
    {
        bookid = bookID;
        author = Author;
        title = Title  ; 
        ficornonfic = FictionORnonfiction;
        x = 0;
    }


    public String PrintListOfBooks()
  {

        return title;

    }

    public String toString() {
     return "Title:" + title + " BookId: " + bookid  + " Author: " + author + ".";
   }
   public int getTitle() {
     return this.title;
}
}
                ---------------------------------------------------------

这是我的图书馆类(class)

   import java.util.ArrayList;



    public class Library
    {


        private ArrayList<Member>listOfMembers;
        public Library()
        {
            listOfMembers = new ArrayList<Member>();
             listOfBooks = new ArrayList<Book>();
        }
        public void storeMember(Member Member)
        {
            listOfMembers.add(Member);
        }
        public int numberOfMembers()
        {
            return listOfMembers.size();
        }

        public void listMembers()
       {
       for (int item=0; item<listOfMembers.size(); item++ ) {
         Member m = listOfMembers.get (item);
        System.out.println(m.GetWholeName());
            }
        } 

    public Member findMember(int id) {

         for(Member member : listOfMembers) {
             if (member.getId() == id) {
                  return member;
             }
         }

         return null;
    }

    private ArrayList<Book>listOfBooks;

        public void storeBook(Book Book)
        {
            listOfBooks.add(Book);
        }
        public int numberOfBooks()
        {
            return listOfBooks.size();
        }

        public void listBooks()
       {
       for (int item=0; item<listOfBooks.size(); item++ ) {
         Book b = listOfBooks.get (item);
        System.out.println(b.PrintListOfBooks());
            }
        }

        public Book findBook(string title) {

         for(Book book : listOfBooks) {
             if (book.getId() == id) {
                  return book;
             }
         }

         return null;
    }


    }

我正在尝试使用库类中的数组打印成员类的标题
公共(public)课书给了我这个错误: http://screencast.com/t/tqpJp2BF8sH

Answer 1

title 是一个 String，而不是 int。您可以更改方法签名以匹配字段类型:

public String getTitle() {
    return this.title;
}