Aryan PrajapatKnowledge Contributor
What is the requirement for an object to be used as key or value in HashMap?
What is the requirement for an object to be used as key or value in HashMap?
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The key or value object that gets used in the hashmap must implement equals() and hashcode() method.
The hash code is used when inserting the key object into the map and the equals method is used when trying to retrieve a value from the map.