[5870] in java-interest
Re: keyword to introduce a method?
daemon@ATHENA.MIT.EDU (Francois BOUSSARD)
Fri Mar 1 10:40:58 1996
From: Francois BOUSSARD <fboussar@coplanet.fr>
Date: Fri, 1 Mar 1996 15:08:17 +0100
To: java-interest@java.sun.com
> >
> >Not true!! In java, all methods are virtual. Thus, if you call foo() on
^^^^^^^^^^^^^^^^^^^^^^^
I'm very surprised of this fact ! :
I had 2 classes :
Master_A,
|
Derived_From_A.
each whith a method paint(Graphics)
+
And a third one using Master_A pointers to unknown real-type objects.
The good paint() was called for instances of Derived_From_A ONLY after i
created an INTERFACE Interface_Master_A wich declare 'abstract paint(..' and
from which Master_A inherit !
So the real-running good schems was :
INTERFACE Interface_Master_A
abstract method()
|
CLASS Master_A implements Interface_Master_A
method(){algo for Master_A}}
|
CLASS Derived_From_Master_A inherit Master_A
method(){algo for Derived_From_Master_A}
The big problem of this fact is that for using virtual functions, I have
to create Interfaces which declares abstract methods. Each new classes whith
new virtual functions have to implement a new Interface declaring those new
abstract methods...
After 5 level of abstraction and derivation, it begins to be very
painfull.
So. Did I missed something somewhere in the Java Syntax ???
Francois.
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