Unlocking the Power of HashMap in Java: Efficient Key-Value Data Management
Unlocking the Power of HashMap in Java: Efficient Key-Value Data Management
A HashMap in Java is a part of the java.util package and is one of the most commonly used implementations of the Map interface
A HashMap in Java is a part of the java.util package and is one of the most commonly used implementations of the Map interface
A HashMap stores information as a collection of key-value pairs, where each key is unique and maps to absolutely one value
A HashMap stores information as a collection of key-value
pairs
, where each key is
unique
and maps to
absolutely
one
value
It permits capable retrieval, insertion, and deletion of components based on keys
It permits capable retrieval, insertion, and deletion of components based on keys
The HashMap works based on a hash table, which is an array of buckets or spaces
The HashMap works based on a hash table, which is an array of buckets or spaces
After you insert a key-value pair into a HashMap, the hashCode() method is called on the key to decide its hash value
After you insert a key-value pair into a HashMap, the hashCode() method is called on the key to decide its hash value
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