abstract class can not instantiate.
abstract class can not create abstract constructor or static method.abstract class must be inherited. and vice versa final class.

abstract class is a class that has no direct instance in 
the system but final class is a class in which we found the 
correct answer

Abstract class is the one which is suppose to be extended
but
when we declare a class as final, we cannot extend it.

An abstract class is one which can't be instantiated, as it 
contains one or more abstract methods( methods that are 
only declared, their implementation is left for 
subclasses).An abstract class always needs to be extended 
in order to be used.
A Final class is one which can't be extended/inherited.

1)abstrat class is just a incomplete class mean to say you 
only declare a method when some class extends this abstart 
class then it adds some facility in this class when you 
define the method body those inherited from the abstract 
class.
2)but the fianl class you cn't able to add the new 
functionality to this class because extnd the class its not 
just mean to make child clss but to means to facilitate 
this class with some aditive coding .so means to say that 
its  complete class you don't able to add new functionality 
in this class and you never extends this class .
thanks                                       amit singh
                                          
amitsing2008@gmail.com