Set: Set is a data structure that is used for storing and processing non duplicate elements. It is an interface which extends collection and it is an unordered collection of objects. Set is implemented by LinkedHashSet, HashSet or a TreeSet. Hash Set: In order to store its elements internally, the HashSet uses HashMaps and it implements the Set interface, backed by a hash table which is actually a HashMap instance. ArrayList: ArrayList provides dynamic arrays in Java and is a part of collection framework and is present in java.util package.

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Chapter 21.4, Problem 21.4.2CP

Program Plan Intro

Set:

Set is a data structure that is used for storing and processing non duplicate elements. It is an interface which extends collection and it is an unordered collection of objects.

Set is implemented by LinkedHashSet, HashSet or a TreeSet.

Hash Set:

In order to store its elements internally, the HashSet uses HashMaps and it implements the Set interface, backed by a hash table which is actually a HashMap instance.

ArrayList:

ArrayList provides dynamic arrays in Java and is a part of collection framework and is present in java.util package.

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