The CERT Secure Coding Standards contains the entry OBJ38-J. Immutable classes must prohibit extension which succinctly describes a primary rationale for specifying an immutable Java class as final: ...

Java does enable the option to mark a class as final to eliminate the ability to perform inheritance complete, but that is often too heavy of a hammer to drop. Marking a class as final prevents all ...

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.