Q) What is the difference between final, finally,
finalize?
Final: - When
we declare a sub class a final the compiler will give error as “cannot subclass
final class” Final to prevent inheritance and method overriding. Once to
declare a variable as final it cannot occupy memory per instance basis.
Final class cannot have static methods
Final class cannot have abstract methods
Final class can
have only a final method.
Finally: - Finally create a block of code that will be
executed after try catch block has completed. Finally block will execute whether or not an exception is thrown. If an
exception is thrown, the finally block will execute even if no catch statement
match the exception. Any time a method is about to return to the caller from
inside try/catch block, via an uncaught exception or an explicit return
statement, the finally clause is also execute.
Using System.exit ();
in try block will not allow finally code to execute
Finalize: - sometimes an object need to perform some actions
when it is going to destroy, if an object holding some non-java resource such
as file handle (or) window character font, these resources are freed before the
object is going to destroy any cleanup processing before the object is garbage
collected.
