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 abstract class
An abstract class is something between inheritance and an interface. In inheritance, a child class extends a parent class, where both the classes have full implementations. In an interface, a parent class does not have any implementation and depends on child classes completely. There are scenarios where a parent class knows the common implementations needed by all child classes but the remaining implementation differs for all.
In the same game that we discussed earlier, there are multiple ways to gain points. If Mario gets any coin, then the overall score will be added (known), but there are different kinds of coins (unknown). Coins may be in blue, yellow, or different colors. Each color will add different scores.
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