Java interface reference

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Java interface reference
2 Answer(s) 2 years and 7 months ago
Posted in : Java Interview Questions

When can an object reference be cast to an interface reference?

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October 27, 2010 at 3:48 PM

Hi,

Here is the answer.

An object reference be cast to an interface reference when the object implements the referenced interface.

Thanks.

August 4, 2012 at 12:53 PM

Yes it is possible.The class which you want to cast,it should be implemented that interface . Example:

List<String> list=new ArrayList<String> ();

List is interface, and arraylist is implemented by list. so that we can cast it into list reference.

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