What is a HashMap in Java? | Hacker Noon

'What is a HashMap in Java?' by MahipalNehra7 java designpatterns

Hashmap also uses a method called Hashing that converts an object into integer form through Hashcoding. **Here is the structure of the Hashmap node that is programmatically represented as a class. The Hashmap class has a similar structure to the LinkedList node and the array of these nodes is called Bucket.

The working of Hashmap is influenced by two parameters, initial capacity and LoadFactor. Initial capacity refers to the Hashmap object capacity when it is constructed and every time it’s multiplied by 2. The LoadFactor parameter measures an increase in capacity while rehashing.Note that when the capacity is higher than the load factor will be small as no rehashing will be needed. And in the case of lower capacity, the load factor will be high as frequent rehashing will be required.

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