In Java, nested classes are categorized as either static member classes or inner classes. Inner classes are non-static member classes, local classes, or anonymous classes.

For an introduction to Java interfaces, including the difference between classes and interfaces, see my Java 101 tutorial Working with interfaces in Java. Nesting interfaces in classes Java lets ...

There are two types of nested classes: static nested classes and inner classes. Written by David Petersheim, Contributor Feb. 3, 2005 at 8:00 a.m. PT A nested class is defined inside another class.

As of Java 10, nested classes are compiled into separate top-level classfiles, but with a special naming convention, so that a nested class Nested within a class Outer is compiled into a file ...