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 ...

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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> ...

While the Hashtable was part of the initial Java release over two decades ago, the HashMap is the correct key-value store to use today. When Java 2 was released, the architects of the language ...