Difference Betwixt Hashmap As Well As Hashset Inwards Java

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

Both HashMap in addition to HashSet are role of collection framework which allows us to travel amongst a collection of objects. Collection Framework has their ain interfaces in addition to implementation classes. Basically, a collection is divided equally Set Interface, List, in addition to Queue Interfaces. All these interfaces own got their ain belongings too apart from they larn from a collection similar Set allows Collection of objects only forbids duplicate value, List allows duplicate along amongst indexing.Queue industrial plant on FCFS algorithm.

First, nosotros own got ane expect on What HashMap in addition to HashSet are in addition to then volition dice for Differences betwixt HashSet in addition to HashMap

What is HashSet inward Java?

HashMap vs HashSet is the most oftentimes asked enquiry during whatsoever Difference betwixt HashMap in addition to HashSet inward Java

override equals() in addition to hashCode() method thence that nosotros tin cheque for equality in addition to no duplicate value are stored inward our set.if nosotros own got created our ain objects nosotros demand to implement hashCode() in addition to equal() inward such a fashion that volition travel able to compare objects correctly when storing inward a ready thence that duplicate objects are non stored,if nosotros own got non override this method objects volition own got default implementation of this method.

public boolean add(Object o) Method is used to add together an chemical constituent inward a ready which returns fake 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 cardinal to value.Duplicate keys are non allowed inward a map.Basically map Interface has ii implementation classes HashMap in addition to TreeMap the principal departure is TreeMap maintains social club of the objects only HashMap volition not.HashMap allows zilch values in addition to zilch keys.HashMap is non synchronized,but collection framework render methods thence that nosotros tin brand them synchronized if multiple threads are going to access our hashmap in addition to ane thread structurally changes our map.

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

You tin read to a greater extent than nearly HashMap inward my article How HashMap industrial plant inward Java in addition to Difference betwixt HashMap in addition to hashtable inward Java

Difference betwixt HashSet in addition to HashMap inward Java

Following are to a greater extent than or less differences betwixt HashMap in addition to HashSet:

HashMap	Hash Set
HashMap is an implementation of Map interface	HashSet is an implementation of Set Interface
HashMap Stores information inward cast of key-value pair	HashSet Store solely objects
Put method is used to add together chemical constituent inward map	Add method is used to add together chemical constituent is Set
In hash map hashcode value is calculated using cardinal object	Here fellow member object is used for calculating hashcode value which tin travel same for ii objects thence equal () method is used to cheque for equality if it returns fake that agency ii objects are different.
HashMap is faster than HashSet because unique cardinal is used to access object	HashSet is slower than Hashmap

Please permit me know if you lot demand whatsoever other departure betwixt HashSet in addition to HashMap inward Java in addition to I volition add together them here.