Difference between HashSet and HashMap | HashSet vs HashMap | Interview QA
Difference Between HashSet and HashMap | HashSet vs HashMap
HashSet stores only unique elements and is used when you don’t need key-value pairs. It internally uses a HashMap to maintain uniqueness.
HashMap stores key-value pairs and allows one null key and multiple null values. It is used when you need to map keys to values.
Use Case: Use HashSet for collections of unique elements and HashMap when mapping between keys and values is required.
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