What are the differences between nested and inner classes?

What are the differences between nested and inner classes?

Nested classes are defined within another class, while inner classes are a type of nested class that has access to the outer class's members.

Can you give me an example of each?

Sure! A nested class can be static and doesn't need an instance of the outer class. An inner class, however, requires an instance of the outer class to be created.

What are the use cases for using inner classes?

Inner classes are useful for logically grouping classes that are only used in one place, enhancing encapsulation and readability.

Are there any performance implications of using inner classes?

Yes, inner classes can have a slight overhead due to the implicit reference to the outer class, but the impact is usually minimal.