Each of these resources recommends making the Java class final as one of the steps in making it immutable. ... When the above demonstration class is executed, its output appears as shown below: ...

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.

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 ...