August 2020
Intermediate to advanced
483 pages
11h 24m
Chinese
Content preview from Head First Kotlin程序设计
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120 第
4
章
toolbox
Kotlin
工具箱
学完本章
，
你向工具箱中添加了类和
对象
。
类允许你自定义类型
。
类是对象的模板
。
一个类可以创建多
个对象
。
对象自己知道的是属性
，
对象自己可
以进行的操作是它们的函数
。
属性是类的局部变量
。
Class关键字定义类
。
点操作符可以访问对象的属性和方
法
。
当你初始化对象时
，
构造函数会运
行
。
在主构造函数中
，
你可以通过在参数
前使用
val或var来定义属性
。
你也
可以在类的主体中定义类的属性
。
初始化块在对象初始化时运行
。
你必须得在使用属性前对其进行初始
化
。
getter
和
sett
er
能够让你获取和设置属
性值
。
实际上
，
编译器将会为每一个属性添
加默认的
gett
er
和
setter
。
第
4
章
本章重点
工具箱
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and much more.
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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.