August 2020
Intermediate to advanced
483 pages
11h 24m
Chinese
Content preview from Head First Kotlin程序设计
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
124 第
5
章
designing for inheritance
设计一个
animal
类继承结构
查找对象共有的属性和行为
。
看看这些
animal
的类型，它们有什么共同点吗？
这有助于你将添加到父类中的属性和行为抽象出来。
1
想象一下，你被要求为
animal
模拟程序设计类结构，让用户在
环境中添加一组不同的
animal
，看看会发生什么。
我们知道一些将包含在应用程序中的
animal
类型，但不是全部。
每种
animal
由一个对象代表，它将做任何特定类型的
animal
被
编程做的事情。
我们想以后在应用程序中能够增加新的
animal
类型，因此将类
设计得足够灵活以适应这一点是很重要的。
在开始考虑特定
animal
之前，需要弄清楚所有
animal
共有的特
征。然后，可以将这些特征包含进父类中，所有
animal
子类都
可以继承。
我们将带你完成类继承层次结构的
一般步骤
，
这是第一步
。
设计类
构建类
使用类
我们不是对整个应用程序进行编程
，
我们更感兴趣的是类的设计
。
设计继承结构
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.