Differentiate between HashSet and HashMap?

Differentiate between HashSet and HashMap?

FeatureHashSetHashMap
DefinitionHashSet is an implementation of the Set interface. It stores unique elements (no duplicates).HashMap is an implementation of the Map interface. It maps keys to values (key-value pairs).
DuplicatesHashSet does not allow duplicate elements.HashMap allows duplicate values but not duplicate keys.
OrderingHashSet does not maintain any specific order of elements.HashMap does not guarantee any specific order of key-value pairs.
Null ValuesHashSet allows a single null value.HashMap allows a single null key and any number of null values.
ImplementationHashSet uses a hash table for storage.HashMap also uses a hash table for storage (key-value pairs).
Examplejava Set<String> names = new HashSet<>(); names.add(“Alice”); names.add(“Bob”); names.add(“Charlie”); System.out.println(names);java Map<String, Integer> scores = new HashMap<>(); scores.put(“Alice”, 90); scores.put(“Bob”, 85); scores.put(“Charlie”, 78); System.out.println(scores);

HashSet and HashMap

In the examples above, HashSet stores unique names, while HashMap associates student names with their scores. Remember that HashSet is ideal for maintaining a collection of unique elements, while HashMap is useful for key-value mappings

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