Can you have a class in a class?

In Java, it is possible to define a class within another class , such classes are known as nested classes. They enable you to logically group classes that are only used in one place, thus this increases the use of encapsulation, and creates more readable and maintainable code.

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What does class :: mean in C++?

Class is the foundation for object-oriented programming. It is a user-defined data type that works as a blueprint and allows its instances to be created which are known as an object. Class in C++ is the combination of data members and member function, which implements the encapsulation and data hiding concepts .

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