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.

The following class demonstrates which Map implementations and which nested Map classes are Serializable and which are not for several popular standard Map implementations.

Starting with JDK 1.1, Java provided the ability to create nested classes. A nested class is defined inside another class. There are two types of nested classes: static nested classes and inner ...

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.