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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?
What are the pros and cons of using Hashmap in Java?
The pros of using Hashmap include fast lookup times, constant time complexity for get() and put() methods, and efficient use of memory. The cons include increased complexity for insert and delete operations due to collision resolution, which can lead to performance degradation if not handled properly.