April 2016
Intermediate to advanced
256 pages
4h 57m
English
Content preview from Apex Design PatternsBecome 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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An interface
An interface is another way to achieve polymorphism and abstraction in Apex. Interfaces are like a contract. We can only add a declaration to a class but not the actual implementation. You might be thinking about why do we need to create a class, which does not have anything in it? Well, I will ask you to think about this again after taking a look at the following example.
We will continue with the Mario example. Like any game, this game also needs to have levels. Every level will be different from the previous; and therefore, the code cannot be reused. Inheritance was very powerful because of the dynamic dispatch polymorphic behavior; however, inheritance can not be used in this scenario.
We will be using an interface to define levels ...
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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.