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Interfaces Describe what classes should do, without specifying how they should do it Not a class, but a set of requirements for classes that want to conform. - ppt download
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Abstract Classes and Interfaces. Abstract methods You can declare an object without defining it: Person p; Similarly, you can declare a method without. - ppt download
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uml - Can a class extend an abstract class and implement an interface at the same time? (java) - Stack Overflow
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