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BJP5 Exercise 18.5: retainAllHashIntSet

Language/Type: Java hashing HashIntSet implementing
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Author: Marty Stepp (on 2019/09/19)

Write a method in the HashIntSet class called retainAll that accepts another hash set as a parameter and removes all elements from this set that are not contained in the other set. For example, if the set stores [-2, 3, 5, 6, 8] and the method is passed [2, 3, 6, 8, 11], your set would store [3, 6, 8].

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This is a partial class problem. Submit code that will become part of an existing Java class as described. You do not need to write the complete class, just the portion described in the problem.

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