Why Collection interface does not extend Cloneable interface ?
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 Q1. Why Collection interface does not extend Cloneable interface ?Core Java2016-09-15 09:40:06

Ans. Here is the list of classes that implements Collections Interface - http://www.buggybread.com/2015/02/java-collections-classes-that-implement.html

Having Collection interface to extend Cloneable interface would mean necessarily implement clone method by all implementing classes. As not all collection classes allow duplicate elements, it makes no sense to clone elements for them.

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