Summary
Let's summarize the concepts covered in this chapter.
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Chapter summary
Let’s summarize this chapter:
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interface
is similar to a class that consists only of abstract functions.interface
can havestatic
member variables andstatic
orfinal
member functions. -
For a class to be constructible, it must have implementations for all member functions of all interfaces that it inherits from.
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It is possible to inherit from an unlimited number of interfaces.
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A common hierarchy consists of a single interface and a number of subclasses that implement that interface.
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