The ordinary HashMap is NOT Thread-Safe, It can have one null key and multiple null values. And we can impleemnt a HashMap like example below: HashMap is non-Synchronized in nature i.e. HashMap is not ...

Performance of HashMap depends on 2 parameters which are named as follows: Initial Capacity; Load Factor; Initial Capacity: It is the capacity of HashMap at the time of its creation (It is the number ...

Hashtablethis class has implemented map interface, before using this data structure you should know their internal implementation hashtable class decleration-<p>public class hashtable<k,v> ...