Java HashMap 🗺️

Java hashmap tutorial explained
#java #hashmap #tutorial

[@BroCodez]

import java.util.HashMap; public class Main { public static void main(String[] args) { // HashMap implements the Map interface (need import) // HashMap is similar to ArrayList, but with key-value pairs // stores objects, need to use Wrapper Class // ex: (name,email),(username,userID),(country,capital) HashMap countries = new HashMap(); //add a key and value countries.put("USA","Washington DC"); countries.put("India","New Delhi"); countries.put("Russia","Moscow"); countries.put("China","Beijing"); //System.out.println(countries); //countries.remove("USA"); //System.out.println(countries.get("Russia")); //countries.clear(); //System.out.println(countries.size()); //countries.replace("USA", "Detroit"); //System.out.print(countries.containsKey("England")); //System.out.print(countries.containsValue("Beijing")); for(String i : countries.keySet()) { System.out.print(i+"\t"+"= "); System.out.println(countries.get(i)); } } }

[@angelcastineira2561]

thank you for sharing the code in the comments. saves a lot of pausing and rewinding :)

[@ikebelida1528]

Bro can you make hash table stuff please..

[@anakinronin5288]

Instablaster

[@mangalmurmu6840]

Yeah you have done correctly no mistake Keep it up😊😊😊

[@salahSaad-ld8id]

Thanks for really amazing video it's really helpful

[@kayleighrenner829]

Your short and clear explanations helped me a lot! Thank you

[@hermitmobile1742]

Every time I watch these videos I am reminded that going to school is overrated … if only my teachers are this clear🤧🤧🤧

[@mctinemacrisp3120]

Love from Germany

[@britneyhanna6667]

Clear explanation as always bro. Thank you this helped me with my assignment.

[@badeaadrian4529]

Thank you. Your videos deserve way more atention!

[@girl6994]

That was what I really need to understand! Hashmap in java!

[@monwil3296]

So simple 👌

[@chetranqui]

Clear, succinct, and complete. Thank you for that.

[@rene2936]

succ int

[@desmiles1567]

Easy and smooth as always Thanks a lot bro

[@IdoH-vf2yc]

Hi Bro, hope you're doing well Your videos and explanations about Java and many other programming languages you have on the channel are excellent, understandable and very helpful. You make a complicated subject much simpler. I was wondering if you could add to the playlist, videos that explain the interfaces: List, Set, Map. And an explanation of their implementers: HashSet, HashMap, TreeMap, TreeSet, SortedMap, SortedSet, etc.

[@justinbanza4751]

Thank you for this video. Very clear and straight forward

[@lamias7712]

I like your time traveling, :D. Thanks for the videos

[@nkatekongobeni2665]

You make coding easy even though I'm mostly learning in theory and writing on pen and paper

[@rimarai7898]

I have been studying Java for 6 months, and my university, as much as the lectures try to help, is absolutely useless, especially for someone like me who suffers from learning disabilities, but your videos are amazing... I wish I found it sooner. They teach me things and help me understand in 1-3 days compared to a month and only half understanding it through my university. Thank you so much! I am been acing my tests with your tutorials xd.

[@milo-ur8zp]

thanks a lot man, crystal clear explanations

[@honkhonkv2236]

When i first heard about Sets and Maps i always thought i'd never use those but they are, in fact, actually easier than actual arrays, i'm kinda mind blown.

[@aygula2834]

Thank you so much for the easily understandable explanation!

[@vpaulino15]

One thing that always confuse me more is long explanations, I really appreciate how you make this simple and straightforward

[@chickentendies5144]

Good thing future bro popped in, I was confused AF and doubting myself.

[@ramie0n]

Thank you for all your efforts

[@youmightdontknow450]

Allways perfact explanation❤

[@FukSN]

Back on the Bro vids. Excellent as usual.

[@wolanus]

Great video. Thanks bro

[@polatsaryerli3071]

bro this is awesome wou put things down so concisely

[@sergeyb6071]

very happy to see new java tutorials Bro!

[@BroCodez]

I'll be updating this playlist more often. It seems there's a big demand for Java

[@user-xe8vl9eh9l]

@@BroCodez theres a big demand for knowledge in the world because most of them cant afford it and want to find free ways to learn .thank you so much for ur videos

[@neetuseharawat3241]

Great explanation

[@ramgunta7707]

Good one...simple and easy explanation...thank you bro 🙂

[@ksboi29]

Great video.

[@sureshponna3405]

Tqs for cleaning my mind with HashMap doughts😊😊

[@kemann3815]

Bravo 👏

[@navidreza4920]

wonderfull

[@sagarkathiriya]

really easy. thanks for goos explanation.

[@ardcodelover]

Outstanding bro sir

[@ideaonic703]

It's an Arraylist with objects as indecies.

[@rukiruki-eg4kc]

I too, think about Hashbrowns alot.

[@greenachos372]

Thank you bro!!!

[@sarthakoberoimusic]

a comment for the sake of defeating the algorithm.

[@mauxcbr4879]

Great Job!

[@talalbadreddine3978]

Hello is there a playlist for hash map , linked list , stack , Queue ? Thanks for your time.

[@luoluoshomemade7169]

really really nice！

[@hlonimalebana9896]

How do you check if a key value pair exists in the hashmap? I.e if capital of India is new Delhi?

[@nawfalnjm5699]

Thank you

[@Ahmad-td4ck]

Thanks bro

[@mohtasimhossain3741]

Bro is a hero❤❤

[@HolyMolyNEWTonMusicNProgrammer]

I LOVE THIS!

[@arrheniusmbakz6160]

You're the best Bro

[@mysterymatt4761]

godly explanation.

[@CarlAngeloAntenor]

me: Searches how to make a hashmap and clicks on a vid also me: *INSTANTLY CLICKS ON ANOTHER HASHMAP VID CAUSE ITS BRO CODE*

[@alexshepel5599]

Nice, bro!

[@ibrahimylmaz8378]

thanks bro

[@IDK-kv8ob]

3:39 the diamond operator at the end of the instantiation does not need to take in the String values. Java infers the type from the first portion! Hey, I actually know something about Java. Feels good.

[@MrLoser-ks2xn]

Thanks

[@khantko4670]

Thank You bro

[@thanhthanhtungnguyen8536]

Nice video

[@rokhafm9412]

the best coding youtuber

[@mini_dota]

Great

[@AdrianTregoning]

At 11:11, why does it not list the hashmap in the same order in which it was created? As always, great video. I started at video number 3 and this is number 76. Plan to do them all. Not just watching, but I'm doing them myself. Loving it. Your consistency in how you explain is remarkable.

[@TheRealZitroX]

A hashmap is not a list where you push elements at the end. Watch a video of a implementation of this method so you know more about it

[@diamonddunyasi4945]

Thanks bro🙂

[@abisarwan20]

could you make course of dsa which you implement code manually

[@harveers820]

this was great

[@Vinay_Thakur108]

❤️From India.

[@fl4shgaming188]

Burger -> Patty Pizza -> Cheese Chapati -> Wheat Spring Roll -> BBQ

[@amankrmj]

Love From India😁😁😁😁

[@samim2121]

Thanx

[@mensahtribeadventures2630]

😎💪🏾💪🏾

[@cherolphoshoko8670]

thanks bro!

[@udaysaimanoj2117]

Nice

[@user-xs6on3cm7o]

Nice time-travel 🙂

[@nages1171]

Keep it up

[@jianlim276]

Yea!!

[@pedroferreira8328]

💪

[@xXMaDGaMeR]

love you bro

[@khoadiep3774]

Can you do a video about Treemap ?

[@Laughing_india_]

you make it too easy to understand

[@tasneemayham974]

OUR BRO CAN TIME TRAVEL!!!

[@user-fi2vc2wt5n]

I took tree speps I smashed the butten, subscribed and yes I`d like to become a fello bro ;)

[@leviplays7466]

you're the bro

[@eagle1341]

Have you ever eaten grass? Because you are the GOAT! :)

[@amankrmj]

I Helped You.... 😊

[@timo_b3]

brooo why do u use da eclipse, intellij is the alpha bro tool

[@benderbg]

5:49 This aged well.

[@kingkock1]

as allWays: Amazing

[@mudzingwajonah7378]

time travelling , Hey guys its bro from the future.

[@arturshakhbanov7608]

Like

[@kristijanlazarev]

Very good, could just write everything in a sout statement, so that we dont waste time talking about how it wont do anything unless we pritn

[@bharathwajp1321]

Broo what about HashSet???

[@manuelgonzalezpalafox2627]

Ly bro 5

[@damnjemy]

i need to learn how to combine hashsets and int ch = sc.jscnext()

[@raphaelmorgan2307]

every time you say we should like comment and subscribe to defeat the algorithm im like how do i subscribe again TnT bc ive watched like 30 of your videos i can only subscribe once lmao

[@BroCodez]

Raphael Morgan You get a free pass my friend

[@mathialagant]

dropping comment

[@dev_troy8903]

USA = Washington DC China = Beijing Russia = Moscow India = New Delhi loved having an assignment at the end 😃

[@elvastaudinger4991]

USA goes ROgue!!lol

[@mohanedomer9081]

ok

[@jeronimo6742]

commenting, as it is my duty

[@paganimarker1898]

what is with the music behind

[@swiftyninja3535]

time to go back to the present

[@girl6994]

There are too many things need to understand, such as collections , list, especially Linkedlist, it is abstract. And tree map. I don’t understand what is tree map. In Chinese they say a word 红黑树 , which means red and black tree style to store hash code.

[@BroCodez]

I wonder why it's called "red and black tree". That is an interesting translation

[@ActualVital]

Bro Code I think he wants a video of a Red-Black tree with code.

[@girl6994]

Bro Code because if you use different color to mark a tree map, it will be more easy to find a certain hash code I think. For example base level is black, and second level is red, and third level is black. But I am also don’t know, why it is called black and red tree.

[@girl6994]

Calibre Yes! It is red-black tree. Sorry.

[@yamalaha9233]

bro

[@LogicalFinds]

8:50 imagine if the USA’s capita was Detroit 😂

[@amaanshaikh6868]

😹

[@cordellgivens5590]

USA = Detroit China = Beijing India = New Delhi Russia = Moscow