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Difference between Stack and ArrayStack ?

 
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What is the Difference between Stack and ArrayStack ?
 
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Stack is a class that exists in the standard Java library (java.util.Stack), and ArrayStack is not a standard Java class. (Where did you find ArrayStack?).

Did you mean ArrayStack from Apache Commons Collections? Its API documentation explains what the difference is with java.util.Stack.
 
Subhash Pavuskar
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@Jesper de Jong :

Hi i found this in Wiki Link so i got confused with this bcs both performing same opeartion !!
 
Jesper de Jong
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Well, that picture is incorrect, because it says the yellow classes and interfaces are in java.util, but Buffer and ArrayStack are definitely not in the package java.util.

ArrayStack from Apache Commons Collections and java.util.Vector indeed have the same functionality, but as the API documentation explains, ArrayStack is based upon java.util.ArrayList, whereas Stack is based upon Vector. The main difference between ArrayList and Vector is that in Vector, all methods are synchronized, but not in ArrayList. The differences between Vector and ArrayList have been discussed before; if you search in the forums, you'll find more information.
 
Subhash Pavuskar
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@Jesper de Jong: Thanks For fast reply.
Well this pictorial diagram from Wikipedia and i am shocked they providing wrong info Link http://en.wikipedia.org/wiki/Java_collections_framework

 
Jesper de Jong
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Wikipedia is usually very good, but it's not always 100% correct...
 
Subhash Pavuskar
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Yeah you are right !!
 
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