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How is Hashmap in Java implemented internally? What are the pros and cons to use it? What are the complexities it provides for insert, delete and lookup?
Can you tell me how Hashmap in Java is implemented internally?
Sure! Hashmap in Java is implemented using an array of buckets, where each bucket represents a key-value pair. The key-value pair is stored in a Map.Entry object and hashed using a hash function to calculate the index of the bucket they should be stored in.