Create a generic CheckedSet class representing a set. Add a HashSet datamember to it which is initialized by a parameterless constructor. Add a method for getting the current size of the set. Add an add(T element) method that may throw an AlreadyContainedException checked exception. Create such a user-defined exception class that is thrown when the set already contains the given element; otherwise add the element to the set. Add a contains(T element) method returning a boolean that checks if the set contains the given element. Test the new class in a main program.

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A: Answer is given below .

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A: Lets see the solution in the next steps

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A: Answer:-

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