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Collections

 
Ranch Hand
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which of the following are true
At the root of Collection hierarchy is the
class called Collection---true
The Collection Interface contains method enumerator--no
the iterator returns an instance of the class Vector--no
returns Iterator
The set interface is designed for unique elements--true
 
Desperado
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Only error is:
Collection is an INTERFACE not a Class.
 
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My question is java.util.Map is also part of Collection . There is no connection bet the Collection interface and this . Then how can we generalize a stmt like this.
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Tony Alicea
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The new Collections framework includes the interface Collection and Map and their sub-interfaces and implementing classes. I know it's somewhat misleading but Map and Collection are independent hierarchically, but both part of the same new framework in Java 2.
 
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