August 2021
Intermediate to advanced
450 pages
4h 46m
Chinese
Content preview from 面向对象的思考过程（原书第5版）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,
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1.8.2 实现
只有公共属性和方法被认为是接口。用户只通过类接口与对象交互时，不应该看到该对象内部实现的任何部分。任何被定义为私有的东西对用户都是不可访问的，这些私有资源属于该类的内部实现。
在之前的例子中，只隐藏了Employee类的实例的属性。很多情况下，也应该隐藏某些方法，不作为接口的一部分。上个章节的求平方值的例子中，用户不应该关心平方值是如何被计算出来的，只要答案正确即可。我们可以修改实现，但不应该影响用户的代码。例如，提供该计算器的公司可以改变算法（很可能因为该算法更高效）而不会影响结果。
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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.