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Empty abstract classs vs Empty interface

 
Ranch Hand
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whats a difference between an empty abstract classs and an empty interface?

Regards
 
lowercase baba
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In a single class, you can implement as many interfaces as you want, but you can only inherit from one abstract class.
 
A Kumar
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A friend of mine was asked this question and she replied the same as you mentioned. But he wasnt satisfied. So is there more to it than just one explanation.
 
Marshal
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Who wasn't satisfied? Your friend is "she" so this "he" is a third person. Seems to me that's the person you should be asking.
 
author and iconoclast
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Well, an empty interface has a special name (a "marker interface"), and the JDK contains a number of examples of how they used to be used, back before annotations were introduced in Java5. An empty abstract class -- well, that's just dumb
 
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