HashMap vs HashTable

HashMap and Hashtable both are used to store data in key and value form. Both are using hashing technique to store unique keys.

Posted September 8, 2022 by Rohith and Anusha ‐ 1 min read

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HashMap is similar to HashTable, but it is unsynchronized. It allows to store the null keys as well, but there should be only one null key object and there can be any number of null values. This class makes no guarantees as to the order of the map. To use this class and its methods, you need to import java.util.HashMap package or its superclass.

Posted August 19, 2022 by Anusha ‐ 6 min read

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