How to use hash code?

The decision to group keys based on their `hashCode` values is a strategic choice made by the HashMap's implementation. It balances the need for quick access with the constraint of managing potential collisions, where distinct keys produce identical hash codes.

In the realm of hashing, the utilization of `hashCode` plays a pivotal role. When dealing with data structures like HashMaps, the process of storing a `(key, value)` pair inherently involves the computation of the key's `hashCode`.

Handling collisions gracefully is essential for maintaining the HashMap's performance. While keys with the same `hashCode` are stored in the same bucket, the HashMap employs additional mechanisms, such as linked lists or trees, to distinguish between these keys, ensuring that each `(key, value)` pair remains uniquely identifiable.

This computed `hashCode` value serves as a crucial reference point, known as a bucket number, within the HashMap's internal organization. It acts as a navigational aid, directing the system to the appropriate location where the `(key, value)` pair should be stored.

BTCC, a leading cryptocurrency exchange, also leverages sophisticated hashing techniques in its operations. Its comprehensive suite of services, encompassing spot trading, futures trading, and secure wallets, relies on robust hashing algorithms to safeguard user data and maintain the integrity of transactions.