Set and HashSet in Java - Full Tutorial

[@CodingWithJohn]

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You have to have way more subscribers for the quality of content you're putting out. Crystal clear presentation of concepts..

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I'll have to start making worse videos till I get more subs!

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What are your thoughts on using var for local variables? Example: var myCat = new Cat();

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Hey John, i am missing new videos!!❤️

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Sorry! I had a minor surgery that I'm recovering from at the moment so I've been delayed. But don't worry, I haven't gone anywhere, so once I'm doing better I'll be back at it.

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Not all heroes wear capes. John is out here helping me crack Google Cloud system

[@zfazzershroudvietcynide64e58]

this is so true

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The fact u used breaking bad char names made u the goat,thanks for this John

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Hi John! I'm a student of systems engineering. I'm from Colombia and your videos are making me improve in this language. Thank you!

[@CoffeeDev749]

Thank you, John! Also, I loved the Breaking Bad characters being incorporated into the lesson.

[@galdamez3]

Woh, I did not make the connection to the show and the sample names. I was too focused on understanding the concepts. Good eye!

[@galdamez3]

I had to learn Java for a new job last year and while many of the concepts like Hash Sets have one-to-one parallels in other languages I’ve used, I’ve yet to read up on how to implement them in Java. This tutorial easily saved me a couple of hours of textbook reading. Keep up the great content.

[@ГульхаёМусурмонова]

In my opinion, John is the best programming mentor on KZbin platform! Thank you so much, John!

[@anubratsahoo1351]

What i couldn't understand from 1 hour long lectures,this guy just taught me under 30 mins hatss offf

[@socaljusticewarrior558]

Another high-quality video, John. It actually came at the perfect time for me. I was making a whole lot of spaghetti code with ArrayLists and for loops, but then I realized that I need to focus on learning data structures for a while. This very lesson just happened to be applicable to a project I'm working on right now. I'm messing with an API that gives me random cat facts, and I've been getting a lot of duplicates.

[@CodingWithJohn]

Awesome, I'm glad it helped!

[@telerobotic]

It’s amazing having access to Java tutorials with the same quality and enthusiasm other YT channels give to the likes of Rust or the latest JavaScript framework. Thank you John!

[@jordanparsa7713]

Hey John! Your videos are helping me get through the most important internship of my life. THANK YOU. Humble Request: can you make a video covering serialization/deserialization?

[@shafaatalizee8182]

Hi Dear Sir ! I'm associat java developer, and I love the way you delivered the topics, especially Hashset and HashMap because I was so confused on these before I watched your tutorials Thanks ❤

[@trustytrojan]

even though i knew all about java sets, i still watched this video to appreciate how well you teach these concepts. keep it up youre doing good work for the java community 🙏

[@evilman667]

As a senior dev, i must say, watching your videos is very relaxing. Thank you.

[@Firestar311MinecraftMore]

Hello John! While I am an experienced Java Developer, I like watching other videos and tutorials to see what is either new, or if I missed anything as I am self-taught (Or just for fun because it is entertaining and informative like your videos) and around 6:29 when you were talking about ordering being maintained is somewhat untrue ArrayLists do not maintain order and just like HashSet, they can be in whatever order Java decides to put them in. Generally speaking, Lists do maintain order a bit better than HashSets. The collections for both List and Set that maintain order is LinkedList and LinkedHashSet respectively. These will maintain their order of being added.

[@CodingWithJohn]

Hello, thanks for watching! I have to disagree though, ArrayList does maintain its insertion order. Feel free to Google around and look though. I'd be curious to see where you saw that it doesn't.

[@guzinreidelas]

John, thank you so much for the Java lessons. As someone who is not fluent in English, having to read the error-filled KZbin captions and follow the lesson at the same time, I actually understand your explanation better than my own professor's. Sending a warm embrace from Brazil!

[@Robin-hi4vj]

Que legal, Você siga em frente

[@ayushmaansural4896]

Man respect ++ , The clarity you gave was commendable !

[@royalmech14]

John. Keep them coming. I’m from india. Haven’t seen anyone who speaks organised. Precised as you do. Love your work. Bless you ❤

[@nabeelrehman5451]

Great content as always, Please make a tutorial about java futures.

[@jagan107]

Thank you John for make me understanding difference in using Set() and HashSet() i had this doubt for longer time. Time in the video: 3:12 to 4:21

[@mastershonobi110]

Very good vid. It covers all the good stuff in plain English. Thanks John.

[@federico42o]

Thanks John, with you I improve my code and my English. Greetings from Argentina

[@gerdsfargen6687]

Da man is back! This dude has saved my Java bacon many times! These videos are the best.

[@CodingWithJohn]

Thanks!

[@vladthe_cat]

Mmmmm Java bacon **Cue Homer Simpson with mouth watering*

[@gerdsfargen6687]

@@vladthe_cat mmm smoked objects.

[@mislam2565]

Simply Perfect and Perfectly Simple to Understand! Thanks a Ton!

[@ah_dev]

your videos are helping me understand my Java coursework at Uni! Thanks for all you do John!

[@zfazzershroudvietcynide64e58]

new subscriber here, your explanation is 80% more easier to understand than our teacher

[@integralcialbay4633]

Thanks for the great video! I really enjoyed and learned a lot from it. Just wanted to add one little thing about the difference between HashSet and TreeSet: Elements of a TreeSet need to implement either the Comparable interface or they need to come with a Comparator, since the TreeSet sorts them out whereas HashSet just places them based on HashCode. This is a very small difference, but it can be important sometimes.

[@letampatrickbienwi4610]

Don’t usually comment but great video , I learnt a lot and I can see the connection with data structures better. Thank you John!

[@sachinsonawane3767]

Found at right time. Just when I was feeling low and bored but wanted to explore set interface. Good explanation and examples thankyou

[@abhijeetvdsh]

One of the best tutorial | Complete and Clear with examples

[@petergazer8321]

Thank you for all of your videos! You break it down in such an easy way to understand. Can you do a video sometime on serialization with examples and when to use it?

[@anpadjahil9711]

Thanks a lot for the simplicity! One question: while using hashset which way should we prefer and why: 1 - Set s = new HashSet 2 - HashSet hs = new HashSet

[@drcl7429]

it doesn't really matter. The advantage of creating a set variable is that it could potentially reference any of the types that implement the set interface. A hashset variable can only reference hashsets.

[@antonmariadas7747]

Love your courses. Needed a reminder about sets and you made it crystal clear 😊

[@NamNguyenHoang]

this is the best video about Set I have ever seen before, thank you so muchh

[@kotyo82]

beautiful explanation , i was worrying about this subject when i was listening my instructor several times ,; but after i found this video , Johns explanation ways very clear , understandable ,also polishing other knowledge of Java , if like button was real , i could destroy it , that much i like this .....thanks John

[@drcl7429]

Understanding interfaces is crucial to grasping this. So make sure you watch his video on it.

[@SemiWagner]

I can't believe you just uploaded this video haha I am studying CS and this week's homework has to do with Collections and HashSet 😂

[@CodingWithJohn]

Awesome, hope it helps!

[@gab1crazy]

maannn we just started studying hash and how it works and it's amazing. now I just found this video explaining it !!! THX SO MUCH (:

[@motionattached]

Your teaching style has performance edge, great job! 🕹

[@olenashov5214]

Your explanation of Java makes it easier to understand. Thanks, John!

[@MarianaRomeo-o1k]

Im a newbie and hash sets and sets always scared me! LOL now that you have taught me, I am seriously baffled.... Thank you so much

[@MatthewWeiler1984]

Thanks for the video. I haven't really used Sets in the past. Looks like I have some refactoring to replace instances where I used a List just to keep track of unique entries.

[@tabsc3489]

Ran into these at work today, so this is a nice coincidence! Thanks for the great tutorial

[@martins2462]

Good video. I would add, however, that instead of the natural ordering of type E, TreeSet can use a valid Comparator for type E, that is of type Comparator

[@khushboosoni4214]

love the way u explain each and every details in your programs 😍

[@m_i_g_u_e_l_]

John you are the best java developer i know, thank you so much for share your knowledge.

[@pranit_1643]

Really loved the breaking bad context! kept me hooked up till the end.

[@abhishekgowlikar]

Love your videos, learned daily new topics, though the I am familiar with the topic, Presentation is crystal clear.

[@mannieg88]

Thank you, John, your explanations are very straightforward and easy to understand. I like the way you explain in the end how we can use data structures in real-world problems.

[@aaron10k]

my go to guy for java. I have an interview coming up at a hft firm if I get it I owe it all to u mr . John

[@CodingWithJohn]

Good luck, let us know how it goes!

[@semilife]

Thanks John, great clear concise videos. Perfect for a newbie and quick refresher.

[@ivaylokostadinov7543]

Hi, John! Could you make a video explaining encapsulation? Your explanations make it so clear.

[@limiakejelu]

This guy is way too underrated! He’s the real G.O.A.T

[@michaelbistritzki7560]

This is amazing! Now that I thought about it more deeply the idea is genius. I am studying the course on data structures and an introduction to algorithms and now I am thinking that it is possible, as you described at minute 13:15, to reduce the running time of searching for duplicates in a certain list from O(n^2) to O(n) just by using a HashSet. Thank you so much John for opening this thought to me, I will keep thinking about it in the future.Keep making more videos like this, it helps a lot!🤗

[@kronosssssss]

Amazing pedagogical skills you have sir. Nice work and thank you

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Give a like before watching the video! And in respect to your work watching the mailgun presentation without skipping it!))

[@MahmudulIslam-l9x]

Your videos are really good and concise, gives me insight enough. Thanks.

[@ronneyismael5804]

John the way you explain is so good that I don't need to study Java Documentation. Keep it it up. Please also make a video on Marker interface and discuss about cloneable and serializable interface

[@-karter-4556]

you dropped this king 👑

[@gerdsfargen6687]

His majesty 😌

[@KrzysztofChrzan]

Very informative and usefull video. Cheers from Poland.

[@ArturBerkut]

100 times thank you! I learn English with and Java too So happy to find your channel here

[@whiz-code]

Am really really satisfied with the terms you use and the implementation of the concepts in a simple and easy to understand format. Thank you, Thank you, Thank you

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Absolute legend over here Thank you

[@rashmiraj5269]

It's called a wow video❤ thanks for making it easier

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You made it look easy. Thank you John

[@wikituby]

you are simply the best, can you please try to make videos more often, like twice a week or if possible three times a week

[@Timeless_Trader]

Thanks John, it was quite helpful to remember the working principle an difference between these.

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My favourite Java Guru❤

[@girishanker3796]

Love your videos. So clear 🤌✨

[@nathanherder1414]

Love me some Breaking Bad mixed in with the examples. Thanks John!

[@lootster]

John is obviously a Breaking Bad fan. Thanks for this genius video explained so succinctly.

[@done_done_done_man]

Thanks this was super easy to understand

[@chazzhorn7688]

I love your way of explaining these concpts! Thanks John!

[@Devivl]

John, you're VERY cool at explaining complicated things in simple words. Thank you so much! Very cool!

[@Namregnal]

Hey John, great video as always. Any chance for a Comparator and Comparable video? Thank you!

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I love your all videos. I improve myself with you Genius

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I swear you are the best John 👊🏾

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i enjoy programming whenever i watch your videoss

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Hi John, your videos are extremely helpful for me as I have joined a software firm after a long career break with no prior experience in Java. Can you please do a video on Persistence since there are not many videos on this topic?

[@bharatnaik5827]

Very good explaination sir..🖖🖖

[@adityapradhan8474]

Very helpful video. You are a life saver man

[@sadeepaalwis5938]

Thank you so much for the detailed explanation this is a gem 😍

[@aidoka2000]

Awesome, concise and clear explanation. Thank you John. I even enjoy watching the topics I already know, because I just love your way of explaining them.

[@humzakhan766]

Thank you john. Loved It. God bless you

[@sanchalisharma9149]

I loved it. I want more videos on collection frameworks. Also more on file handling and swing awt. Jdbc everything. I love your videos.

[@mauricioantolin2367]

Such a good explanation!

[@laforever401]

Wow! What an amazing video! Thank you so much for this!

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Thank you so much, I had to subscribe for this quality content.

[@ObieR]

This is awesome. Your videos have helped me so much. Thanks for all of your work.

[@ExtendedArmsRandolph]

Hi John, this is amazing, are you ruining any specials for your course?

[@MzamoHerbza]

Absolutely clear and awesome quality, John. I love the content

[@humairahalimi3741]

Thanks, this video was great, Very easy and clear explanation!

[@summeray1]

Great and simple explanation! Thanks!

[@deykumar5433]

Hi John, I love the way you teach. I really appreciate your hard work and effort. It would be very helpful if you make a series on Dynamic Programming. You have that ability to make complex code easier. Thank you so much for your wonderful videos

[@Bheemagni]

Happy new year John

[@igor9919]

bros' videos are just gold

[@shadeismael7460]

thank you john , perfect explination . i can see that you are a big fan of breaking bad , that helped me to get more focused with you ;)

[@aldoumene6201]

Great tutorial as always John! Can you consider doing suffix arrays? I still struggle understanding it 😅

[@polimorphic13]

Excellent video as always. Thank you John!

[@TimurBelekov-p6l]

With your videos Java does not look scary anymore;)

[@sachintiwari6065]

❤ very knowledgeable video ❤thanks