How to use User defined Object as key in HashMap with an example

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[@avinashbhargude8048]

excellent explanation..useful video

[@roshnasuresh1391]

Clear explanation 🎉

[@suryanarayanbisoyi292]

Excellent explanation...keep continuing....you dont consider this as source of money income...upload videos in your free time...and make it your passion...you will do wonders

[@shreyashachoudhary480]

Very clear explanation! Thanks.

[@T_tintin]

Can we use arrays as a key for hashmap too?

[@sheena936]

Nicely explained!👍🙏

[@SivaReddyJavaTechie]

Thanks Anurag. Please refer our KZbin channel to your friends and colleagues as it might be helpful for them. Happy learning.

[@sheena936]

Already shared. It is really helpful.

[@abhinavtiwari5597]

This is nice explanation!!! for immutable key objects

[@SivaReddyJavaTechie]

Thanks Abhinav. Please refer our channel to your friends circle as it might be helpful for them. Happy Learning.

[@chandrachurdafadar6809]

Just what I needed 🎉🙏

[@sameerpatere2983]

nice explanation sir... thank u so much

[@SivaReddyJavaTechie]

Thanks Sameer. Please refer our channel to your friends circle as it might helpful for them. Happy learning.

[@ramanavanchanagiri1014]

Hi Sir your video was good if i want to update the other values empname and usernumber using the emp id is that possible.?

[@GuruFoodTravel]

Very Nice sir .

[@SivaReddyJavaTechie]

Thanks Guru. Please refer our KZbin channel to your friends and colleagues as it might be helpful for them. Happy Learning.

[@vickkieonline4252]

Hi Siva, very good explanation ,please provide demo on Junit framework

[@SivaReddyJavaTechie]

Thanks Vickkie. I will provide demo on Junit ASAP.

[@SivaReddyJavaTechie]

Junit Tutorial - kzbin.info/www/bejne/lWScf6Zsl9iCmbc

[@seemaprajapati964]

Sir in case we have a null key then how we can reduce it .... If we don't want to store this value ........ !! Map.reduce ()will called or something else pls answer.

[@shivamkumar-qs7er]

Good Explanation.!

[@SivaReddyJavaTechie]

Thanks Shivam. Please refer our KZbin channel to your friends as it might be helpful for them. Happy Learning.

[@DonSPBLegogames]

Thank you very much!

[@dhanalakshmigurunathan1339]

good explanation... keep going...

[@akashphadtare311]

Very nice..!!

[@SivaReddyJavaTechie]

Thanks Akash.

[@chayanweekend1020]

Well explained

[@Ravikumar-gj6qw]

Sir y it is not taking input value of empid in ur pg

[@kumarraja1441]

If two unequal objects have same hascode how it will print

[@SivaReddyJavaTechie]

It will print both unequal objects in the HashMap as it will be stored as LinkedList if more than one object having same hashcode but those are unequal

[@vijayvaswani9717]

very nice

[@SivaReddyJavaTechie]

Thanks Vijay. Please refer our KZbin channel to your friends circle as it might be helpful for them. Happy Learning.

[@shashanksinghsisodiya514]

Mercedes benz i got one question..let we have hashmap with three same key with different value..when normal get() which value will be printed? I told last one will be printed updated one..then he ask if we give user-defined object as a key then which one will be printed..i told result will be the same updated one(third one) will be printed?? In HASHMAP IN THIS CASE key won't override??first key will be printed?? He told my ans is wrong??

[@TheKamaltomar]

If you are using user defined object and you have overridden hashcode and equals , then it will give updates value otherwise it will add all key value pairs.. and without overriding two methods if you use get then first key value pair it will show definitely...

[@abdulrawoof5129]

How to change key

[@suchitvlogTech2130]

How to sort this based on values.???

[@SivaReddyJavaTechie]

You need implement Comparable or Camparator interface and override compareTo / compare method and use Collections.sort method to sort based on your requirement.

[@suchitvlogTech2130]

@@SivaReddyJavaTechie ya sir got. Thanks

[@suchitvlogTech2130]

@@SivaReddyJavaTechie sir make a video on this.based on keys and based on values. It will very greatfull.

[@for461]

How to use user defined object as key and value in Hash Map

[@TheKamaltomar]

This video explained the same bro.