java - 从简单的书本类中获取作者名

因此，我是面向对象编程的新手。我正在做下一个练习：


给定一个定义为具有以下属性的类Book：

Author author;
String title;
int noOfPages;
boolean fiction;

为每个这些属性编写标准的get / set方法标头。
[编码]实际上根据练习1中要求的属性和get / set方法对Book类进行编码和编译。


这是我的代码：

public class Author {

    //private variable
    private String name;
    private String gender;
    //constructor
    public Author (String name, String gender){
        this.name = name;
        this.gender = gender;
    }
    //getters
    public String getName(){
        return name;
    }
    public String getGender(){
        return gender;
    }
public class Book {

    //private variables
    private Author author;
    private String title;
    private int noOfPages;
    private boolean fiction;

    //constructor
    public Book(String title, int noOfPages, boolean fiction){
        this.author=new Author ("Jacquie Barker","Female");
        this.title = title;
        this.noOfPages=noOfPages;
        this.fiction = fiction;
    }

    //getters
    public Author getAuthorsName(){
        return this.author;
    }
    public String getTitle(){
        return title;
    }

    public int getNoOfPages(){
        return noOfPages;
    }

    public boolean getFiction(){
        return fiction;
    }

    //setters
    public void setAuthor(Author newAuthor){
        author=newAuthor;
    }
    public void setTitle (String title){
        this.title=title;
    }
    public void setNoOfPages(int noOfpages){
        this.noOfPages=noOfpages;
    }
    public void setfiction(boolean fiction){
        this.fiction=false;
    }

    public String toString(){
        return "Title: " + this.title + "\n"+"Author: " + this.author + "\n" +
               "No. of pages: " + this.noOfPages + "\n" + "Fiction: " + this.fiction;
    }
}

这是main的摘录：

Title: Beginning in Java Objects

Author: book.Author@15db9742

No. of pages: 300

Fiction: true

如您所见，该程序不会打印作者的姓名。

我感谢所有帮助！

最佳答案

如果要返回作者的姓名，请将其更改为：

public Author getAuthorsName(){
    return this.author;
}

至：

public String getAuthorsName(){
    return this.author.getName();
}

当前，您正在从方法中返回类Author的对象，因此要获取作者的姓名，您需要在调用代码中调用author.getName()或更改现有方法以返回作者的姓名，如上所述。