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.

8 guidelines for writing reusable Java code Define the rules for your code Document your APIs Follow standard code naming conventions Write cohesive classes and methods Decouple your classes Keep ...

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.