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<String, String> countries = new HashMap<String, String>();

//add a key and value
countries.put("USA", "Washington DC");
countries.put("India", "New Delhi");
countries.put("Russia", "Moscow");
countries.put("China", "Beijing");


//countries.remove("USA");

//countries.clear();

//countries.replace("USA", "Detroit");



for(String i : countries.keySet()) {
System.out.print(i+"\t"+"= ");

}

}
}

[kayleighrenner]

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

[vpaulino]

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

[IdoH-vfyc]

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.

[britneyhanna]

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

[rimarai]

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.

[hermitmobile]

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

[chetranqui]

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

[mctinemacrisp]

Love from Germany <3
I'm here because I can like your "Full Java Course" just once...

[nkatekongobeni]

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

[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.

[greenrocket]

I always learn something new from your videos, thank you!

[sergeyb]

very happy to see new java tutorials Bro!

[huyoan]

THANK YOU VERY MUCH. YOUR VIDEOS WERE REALLY USEFUL FOR BEGINNERS LIKE ME. Once again, thanks, Bro.

[girl]

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

[justinbanza]

Thank you for this video.
Very clear and straight forward

[honkhonkv]

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.

[sureshponna]

Tqs for cleaning my mind with HashMap doughts😊😊

[lamias]

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

[badeaadrian]

Thank you. Your videos deserve way more atention!