Declare classes final in Java to prevent inheritance, and ensure the immutability of objects (like String). When a class should never change state after creation. …see more ...

This two-part tutorial teaches you how to use inheritance in your Java programs. ... In Java, we use the final keyword to prevent some classes from being extended.

Marking a class as final prevents all inheritance, by anyone -- even the original developer cannot inherit from one of their own final classes. It's a powerful but potentially messy design constraint.

An abstract class is a class that is declared abstract using the abstract keyword. It may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.

Learn when you should declare a class or an interface as final in JavaSE, and what are the advantages and disadvantages of using the final keyword. Agree & Join LinkedIn ...