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What is the purpose of nested classes?
Any examples?
I don’t really see the need for them. Why not just create a new class? It seems really unorganized when using a nested class.
Why Use Nested Classes?
There are several compelling reasons for using nested classes, among them:
Logical grouping of classes—If a class is useful to only one other class, then it is logical to embed it in that class and keep the two together. Nesting such “helper classes” makes their package more streamlined.
Increased encapsulation—Consider two top-level classes, A and B, where B needs access to members of A that would otherwise be declared private. By hiding class B within class A, A’s members can be declared private and B can access them. In addition, B itself can be hidden from the outside world.
More readable, maintainable code—Nesting small classes within top-level classes places the code closer to where it is used.