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How to represent it?

Rohan Deshmkh
Ranch Hand

Joined: Aug 31, 2012
Posts: 127
Suppose Animal is a superclass And Horse is it's Subclass.
So Animal a=new Animal() would be shown as in diagram:


now i wanted to how can you represent
Animal a=new Horse()


Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14144
    
  18

Simply replace the word Animal in the picture by Horse?


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Rohan Deshmkh
Ranch Hand

Joined: Aug 31, 2012
Posts: 127
Then how can we differentiate between
Animal a=new Horse();
and
Horse a=new Horse();
digramatically?

Of course i know the difference between the two statements in general, i just wanted to know if in a diagram i replace Animal with Horse.
How can i know whether it represents
Animal a=new Horse();
or
Animal a=new Animal();
Matthew Brown
Bartender

Joined: Apr 06, 2010
Posts: 4387
    
    8

If you want to differentiate between those, I'd suggest labelling the reference with the type. So instead of a, use a: Animal and a: Horse (or equivalent notation).
Rohan Deshmkh
Ranch Hand

Joined: Aug 31, 2012
Posts: 127
ok thanks, i got it
 
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subject: How to represent it?