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What is the difference between HashSet and HashMap in JAVA?

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What is the difference between HashSet and HashMap in JAVA?

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The differences between the HashSet and HashMap are listed below.

  • HashSet contains only values whereas HashMap includes the entry (key, value). HashSet can be iterated, but HashMap needs to convert into Set to be iterated.
  • HashSet implements Set interface whereas HashMap implements the Map interface
  • HashSet cannot have any duplicate value whereas HashMap can contain duplicate values with unique keys.
  • HashSet contains the only single number of null value whereas HashMap can hold a single null key with n number of null values.

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