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");
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.
@@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
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.
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.
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.
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.
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
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));
}
}
}
thank you for sharing the code in the comments. saves a lot of pausing and rewinding :)
Bro can you make hash table stuff please..
Instablaster
Yeah you have done correctly no mistake
Keep it up😊😊😊
Thanks for really amazing video it's really helpful
Your short and clear explanations helped me a lot! Thank you
Clear explanation as always bro. Thank you this helped me with my assignment.
Clear, succinct, and complete. Thank you for that.
succ int
Love from Germany
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.
One thing that always confuse me more is long explanations, I really appreciate how you make this simple and straightforward
very happy to see new java tutorials Bro!
I'll be updating this playlist more often. It seems there's a big demand for Java
@@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
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.
That was what I really need to understand! Hashmap in java!
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.
Thank you. Your videos deserve way more atention!
Thanks bro you made learning code fun. ❤
I don't even have python as a subject but started anyway because I'm having fun
I like your time traveling, :D. Thanks for the videos
Easy and smooth as always
Thanks a lot bro
Bro is a hero❤❤
a comment for the sake of defeating the algorithm.
I always learn something new from your videos, thank you!
THANK YOU VERY MUCH. YOUR VIDEOS WERE REALLY USEFUL FOR BEGINNERS LIKE ME. Once again, thanks, Bro.
Every time I watch these videos I am reminded that going to school is overrated … if only my teachers are this clear🤧🤧🤧
Thank you for this video.
Very clear and straight forward
Great video.
You make coding easy even though I'm mostly learning in theory and writing on pen and paper
Nice video
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.
Great video. Thanks bro
thanks a lot man, crystal clear explanations
So simple 👌
Bravo 👏
Allways perfact explanation❤
wonderfull
Great
Outstanding bro sir
Great Job!
awesome~
Great explanation
Keep it up
Yea!!
Nice time-travel 🙂
Nice, bro!
Nice
Good one...simple and easy explanation...thank you bro 🙂
Love From India😁😁😁😁
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.
the best coding youtuber
bro this is awesome wou put things down so concisely
Thank you for all your efforts
Have you ever eaten grass? Because you are the GOAT! :)
Tqs for cleaning my mind with HashMap doughts😊😊
doubts*
really easy. thanks for goos explanation.
Thank you so much for the easily understandable explanation!
nice
You're the best Bro
really really nice！
Cheers bro
It's an Arraylist with objects as indecies.
😎💪🏾💪🏾
❤️From India.
💪
I LOVE THIS!
godly explanation.
me: Searches how to make a hashmap and clicks on a vid
also me: *INSTANTLY CLICKS ON ANOTHER HASHMAP VID CAUSE ITS BRO CODE*
this was great
I took tree speps I smashed the butten, subscribed and yes I`d like to become a fello bro ;)
I too, think about Hashbrowns alot.
Thank you
Thank you bro!!!
OUR BRO CAN TIME TRAVEL!!!
Thanks bro 😊😊
Thanks bro
Burger -> Patty
Pizza -> Cheese
Chapati -> Wheat
Spring Roll -> BBQ
you make it too easy to understand
love you bro
Thanks bro 😁
Thanks
you're the bro
Carried me through my comp si exam
Hello is there a playlist for hash map , linked list , stack , Queue ? Thanks for your time.
Thanx
I Helped You.... 😊
Thank You bro
Good thing future bro popped in, I was confused AF and doubting myself.
Thanks bro🙂
Can you do a video about Treemap ?
thanks bro!
could you make course of dsa which you implement code manually
love you
as allWays: Amazing
okay sir
How do you check if a key value pair exists in the hashmap?
I.e if capital of India is new Delhi?
time to go back to the present
time travelling ,
Hey guys its bro from the future.
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
Raphael Morgan You get a free pass my friend
5:49 This aged well.
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
gracias
Ly bro 5
USA goes ROgue!!lol
Middleweight = Dricus Du Plessis
Lightweight = Islam Makhachev
Welterweight = Belal Muhammed
Featherweight = Ilia Topuria
ur a legend
Like
varmeste