please give me example
Nicolas is right,When u have to use an abstract
class the methods in abstract class have to be
marked abstract,and when this class is subclassed,
subclass need to provide the relevant implementation for
each abstract method,while interfaces methods in Interfaces
are abstract by virtue of their declaration,and
should not be declared abstract.Also an Interface
is abstract by definition and therefore cannot
be instayiated.it should not be declared abstract.
Originally posted by Nicholas Cheung:
As Java does not support multiple inheritance, when you need to have a class (or abstract class) that contains various features, you have to use interfaces.
Wow nick what a long list of degrees ?..a studious guy i shud say