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implementing multiple interfaces

Lucas Smith
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Joined: Apr 20, 2009
Posts: 804
    
    1

Consider that:



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Ankit Garg
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Joined: Aug 03, 2008
Posts: 9305
    
  17

Is this a question?? You can't implement both interface A and B in one class...


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Lucas Smith
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Joined: Apr 20, 2009
Posts: 804
    
    1

OK, but a class can implement multpile interfaces. It's a particular example. Stay tuned!
Prithvi Sehgal
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Joined: Oct 13, 2009
Posts: 774
Well,

This program won't compile. Because you cannot implement both interfaces in class C.
Compiler will be ambigious about method a(). Try to change the argument list in either A
or B, then will allow you to implement both the interfaces, as one method will be correctly
overloaded.

Best Regards,


Prithvi,
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Henry Wong
author
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Joined: Sep 28, 2004
Posts: 18896
    
  40

Lucas Smith wrote:OK, but a class can implement multpile interfaces. It's a particular example. Stay tuned!



Yes, Java supports implementing multiple interfaces --- but that doesn't mean that you can use the feature to get around overloading rules. You are not allowed to have to methods with the same signature and different return types in a class.

Henry


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Lucas Smith
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Joined: Apr 20, 2009
Posts: 804
    
    1

I see. I can notice some bugs in Java.


It is not perfect. The intention behind method a() from those interfaces can be different.
 
Consider Paul's rocket mass heater.
 
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