How can allow duplicate value in set show by doing program....
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Question : Collection
How can allow duplicate value in set show by doing program....
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Re: Question : Collection
A Set does not have duplicate elements.
Can you explain what you are trying to do?
An ArrayList can have duplicate values.
If you don't understand my answer, don't ignore it, ask a question.
Re: Question : Collection
A set's definition is a collection of unique items, so it doesn't make sense to have duplicate values.
There are things known as "multi-sets" or "multi-maps" which do allow duplicate values, but there are no standard implementations in Java.
The simplest way to get something that appears like a multi-map is to create a map with a List for each key. See: The Java Tutorials: The Map Interface
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