What is final, finalize() and finally?

What is final, finalize() and finally?

final: final keyword can be used for class, method and variables.

A final class cannot be subclassed and it prevents other programmers from subclassing a secure class to invoke insecure methods.

A final method can' t be overridden

A final variable can't change from its initialized value.

                  

finalize( ) : finalize( ) method is used just before an object is destroyed and can be called just prior to garbage collection.

finally: finally, a key word used in exception handling, creates a block of code that will be executed after a try/catch block has completed and before the code following the try/catch block. The finally block will execute whether or not an exception is thrown.

                        For example, if a method opens a file upon exit, then you will not want the code that closes the file to be bypassed by the exception-handling mechanism. This finally keyword is designed to address this contingency.