Re: Some questions about inheritance

Kallol Borah a écrit : 
Tony
My take on your query is this :
a) Abstract classes do have method signatures that defines the
semantics of the actual implementation of the method by a sub-class.
They therefore specify a behavioral pattern, although, of course, that
pattern can be over ridden by the sub-class method implementation.
b) Different semantics - your second part of the question probably
refers to method overriding - the sub-class methods may override the
superclass semantics and implement those methods in a different way.

Delegation and Composition are two ways of extending behavior.
Delegation is most commonly seen in class inheritance where a subclass
extends a superclass or an abstract class
Composition refers to a class aggregating behavior, lets say, defined
by several interfaces or an interface composing/aggregating behavior
defined by other interfaces.

Hope this helps.

It doesn't. Either you are joking - and it's not fun - or you don't know zilch about OO. In both cases, please stop posting such non-sense.

.

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