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IN java collections we have both interfaces and classes.
instead of using interfaces why we can't use classes only
like that why we can't use interfaces only. why we need two
things interface and class.
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Answer Posted / reddy
The purpose of interface is to have abstract methods and
the class which implemnts the interface has to define the
methods in the interface.
The reason why java collections have both interfaces and
classes is interface will have common methods which will be
needed by one or many classes. The classes which wants to
behave like this interface will implement this interface
and define methods in the interface.
| Is This Answer Correct ? | 14 Yes | 4 No |
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