Question

我正在做一个家庭作业问题，并且不确定我的代码有什么问题。问题是：http://prntscr.com/1xe4gd。

到目前为止我的代码：

public class Person //This is the class
{
    String firstName;
    String familyName;
    boolean isFemale;
    String partner;
}

到目前为止我的方法是：

Person getAngelinaJolie()
    {
        Person person1 = new Person();
        person1.firstName = "Angelina";
        person1.familyName = "Jolie";
        person1.isFemale = false;
        person1.partner.firstName = "Brad";
        person1.partner.familyName = "Pitt";
        return person1;
    }

当我编译时，错误说“找不到符号 - 变量firstName”。有谁可以帮我这个。不知道为什么它找不到符号。

Answer 1

您已在类Person中定义String partner;，但我认为您的意思是Person partner;，那么您可以在person1.partner = new Person();之后设置它的属性

这是正确的代码：

Person getAngelinaJolie()
    {
        Person person1 = new Person();
        person1.firstName = "Angelina";
        person1.familyName = "Jolie";
        person1.isFemale = true;

        person1.partner = new Person();
        person1.partner.firstName = "Brad";
        person1.partner.familyName = "Pitt";
        person1.partner.isFemale = false;

        person1.partner.partner = person1;

        return person1;
    }

Answer 2

public class Person //This is the class
{
    String firstName;
    String familyName;
    boolean isFemale;
    Person partner;
}

和现在的方法相同

Person getAngelinaJolie()
    {
        Person person1 = new Person();
        person1.firstName = "Angelina";
        person1.familyName = "Jolie";
        person1.isFemale = false;
        person1.partner.firstName = "Brad";
        person1.partner.familyName = "Pitt";
        return person1;
    }

现在person.partner.firstname将引用已经定义的人员合作伙伴

如何在Java中引用另一个对象？

2 个答案: