无法理解对象状态，行为和身份? [英] Trouble understanding Object State, Behavior, and Identity?

问题描述

我的教授指示我在页面上进行自我介绍，就好像我是一个对象一样，并且必须解决三件事:
1)对象状态，2)行为和3)身份.

I have been instructed by my professor to introduce myself on a page as if I were an object, and that I must address three things:
1) Object State, 2) Behavior, and 3) Identity.

但是，对于如何做这样的事情，我还是很困惑. (我已经阅读了必须解决的三个属性，但是我不知道如何将其应用于一个人.)
例如，有人告诉我狗的状态，名称和颜色等.以及行为，例如走路，吠叫或摇尾巴.

However, I am still really confused as to how I would go about doing something like this. (I have read about the three attributes I must address, but I don't know how I would apply it to a person).
For example, I was told a dog would have States, such as name, color, and breed; as well as Behaviors, such as walking, barking, or wagging their tail.

我会做类似的事情吗?

Student me = new Student();
System.out.println(me.getName()); //a state?
System.out.println(me.getCurrentActivity()); //A behavior? (if it were to return watching TV or something) 
System.out.println(me.get....()); //???

还是我在这里得到一个完全错误的想法?

Or am I getting the completely wrong idea here?

推荐答案

对象的特征是:

状态: 对象有什么，学生有名字，姓氏，年龄等

State: what the objects have, Student have a first name, last name, age, etc

行为: 对象做什么，学生参加了面向初学者的Java"课程

Behavior: what the objects do, Student attend a course "Java for beginners"

身份: 什么使它们唯一，学生有学生ID号或唯一的电子邮件. (这在实现equals方法时很重要，以确定对象是否不同)

Identity: what makes them unique, Student have Student-ID-number, or an email which is unique. (this is important when implementing the equals method, to determine if the objects are different or not)

Student john = new Student("John");
john.setCurrentActivity("Learning Java");
john.setAge(21);
john.setWeight(173);
john.setAddress(...);
john.setHobbies(...);

您就可以弄清楚吸气剂.

and you can figure out the getters.

public class Student {
    private String name;
    private int    age;
    //etc

    // construct a new student 
    public Student(String name) {
        this.name   = name;
    }

    public setAge(int age) {
        this.age   = age;
    }

    public int getAge() {
        return age;
    }
}

一个汽车对象的插图，我发现它可能对您有帮助...

An illustration of a Car object, which I found that might help you some...

汽车状态:

• 速度
• RPM
• 齿轮
• 方向
• 燃油水平
• 发动机温度

行为:

• 换挡
• 快/慢
• 倒退
• 停止
• 关闭

身份:

• VIN
• 车牌

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