{"id":236330,"date":"2024-05-04T03:20:37","date_gmt":"2024-05-04T03:20:37","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/?p=236330"},"modified":"2024-05-04T03:20:37","modified_gmt":"2024-05-04T03:20:37","slug":"how-to-calculate-index-value-in-hashmap","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/how-to-calculate-index-value-in-hashmap\/","title":{"rendered":"How to calculate index value in hashmap?"},"content":{"rendered":"

Index value in Hashmap is calculated by applying a hash function to the key. The resulting hash code is then converted to an index within the array of the HashMap by using a masking operation.<\/b><\/p>\n

Hashmaps are widely used in programming for storing key-value pairs efficiently. When you insert a key-value pair into a Hashmap, the Hashmap uses the key’s hash code to calculate the index position where the value will be stored. Here’s how it works:<\/p>\n

1. A hash code is calculated for the key using the key’s `hashCode()` method.
\n2. Hash code is further processed by a hash function to improve distribution.
\n3. The resulting hash code is then converted to an index within the array of the Hashmap by performing a bit-wise AND operation with the Hashmap’s capacity – 1.<\/p>\n

This process ensures that the values are evenly distributed across the array of the Hashmap, reducing collisions and providing quick access to the stored values.<\/p>\n

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