Difference Betwixt Hashmap Together With Hashset Inward Java

HashMap vs HashSet is the most oftentimes asked inquiry during whatsoever core coffee interview and interview is non said completed until they volition non encompass the Collection Framework and multi-threading interview together with collections are uncompleted without Covering Hash Set together with HashMap.

Both HashMap together with HashSet are purpose of collection framework which allows us to function alongside a collection of objects. Collection Framework has their ain interfaces together with implementation classes. Basically, a collection is divided equally Set Interface, List, together with Queue Interfaces. All these interfaces own got their ain belongings likewise apart from they teach from a collection similar Set allows Collection of objects simply forbids duplicate value, List allows duplicate along alongside indexing.Queue industrial plant on FCFS algorithm.

First, nosotros own got ane await on What HashMap together with HashSet are together with hence volition conk for Differences betwixt HashSet together with HashMap

What is HashSet inward Java?

HashMap vs HashSet is the most oftentimes asked inquiry during whatsoever Difference betwixt HashMap together with HashSet inward Java

override equals() together with hashCode() method hence that nosotros tin banking company jibe for equality together with no duplicate value are stored inward our set.if nosotros own got created our ain objects nosotros demand to implement hashCode() together with equal() inward such a fashion that volition hold out able to compare objects correctly when storing inward a gear upwardly hence that duplicate objects are non stored,if nosotros own got non override this method objects volition accept default implementation of this method.

public boolean add(Object o) Method is used to add together an chemical factor inward a gear upwardly which returns faux if it’s a duplicate value inward instance of HashSet otherwise returns truthful if added successfully.

What is HashMap?

HashMap is an implementation of Map Interface, which maps a fundamental to value.Duplicate keys are non allowed inward a map.Basically map Interface has ii implementation classes HashMap together with TreeMap the top dog deviation is TreeMap maintains gild of the objects simply HashMap volition not.HashMap allows cipher values together with cipher keys.HashMap is non synchronized,but collection framework render methods hence that nosotros tin brand them synchronized if multiple threads are going to access our hashmap together with ane thread structurally changes our map.

public Object put(Object Key,Object value) method is used to add together an chemical factor inward the map.

You tin read to a greater extent than almost HashMap inward my article How HashMap industrial plant inward Java together with Difference betwixt HashMap together with hashtable inward Java

Difference betwixt HashSet together with HashMap inward Java

Following are about differences betwixt HashMap together with HashSet:

HashMap	Hash Set
HashMap is an implementation of Map interface	HashSet is an implementation of Set Interface
HashMap Stores information inward shape of key-value pair	HashSet Store solely objects
Put method is used to add together chemical factor inward map	Add method is used to add together chemical factor is Set
In hash map hashcode value is calculated using fundamental object	Here fellow member object is used for calculating hashcode value which tin hold out same for ii objects hence equal () method is used to banking company jibe for equality if it returns faux that agency ii objects are different.
HashMap is faster than HashSet because unique fundamental is used to access object	HashSet is slower than Hashmap

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