Kotlin Crash Course

[@PhilippLackner]

Thanks for the opportunity Brad, and I hope you guys like Kotlin! :)

[@eren1514]

Good work mate! You deserved to be here *Eronred :)*

[@PhilippLackner]

@@eren1514 Yo, thanks man :)

[@amano_akane]

Wooooow Philip here you are again. Remember me ?

[@gauravthakkar802]

Yayy

[@TheVertical92]

good to see a fellow german here 👍

[@Asifkabeer]

Watched the entire thing as I practiced in IntelliJ. Super helpful. This was my introduction to Kotlin and I cant say enough how simple you made it. Thank you so much Philip.

[@samha1513]

i like how he explains the abstract class with example. well done!

[@KeithDCommiskey]

​For anyone who finds there is no "File -> New -> Kotlin Class/File" option, you may have to mark the top folder (in the Project pane; with the project path next to it) as being the "Sources Root". Right-click the folder and use the "Mark Directory as... -> Source Root" option. Then the "Kotlin Class/File" option should become available from the "File -> New" menu.

[@JordanTheImpaler69]

This is exactly the issue I was dealing with. Thank you so much.

[@Dheemantha]

great tutorial, I am a java developer newly entering to the kotlin programming and this covers kind of all the things for me. Thanks and keep up the good work.

[@philekiert1251]

Thanks so much for this, this has got me up to speed enough to make a start on the little project I'm working on! Quick note for anyone new to programming confused by the lambda function syntax around an 01:20:00, "function" and "string" here are just arbitrary names for those objects, not keywords. They could just as easily be anything else.

[@vineetranjan08]

Oh Wow. Just few hours ago I was searching for Kotlin tutorial, and here it is !

[@bobbylinse6668]

Great job! That was super informative. The only feedback I'd give, is that when you're declaring a variable of type String or type fun, to use slightly different naming conventions to avoid any confusion. For example, if you're declaring a String, avoid calling it "string" and if you're declaring a function to avoid calling it "function" It just made the lambda and generics section a little bit harder to follow is all. Other than that, this was a 10/10. You did a great job explaining some of these concepts!

[@justamemer4400]

This is an excellent tutorial for beginners to understand basic concepts such as functions if else if etc; as well as for people who have learnt all the advanced concepts before in java but have never used kotlin before and are now moving to kotlin for android dev.

[@GabrielTobing]

Indeed, I'm moving over from Java and this is really helpful XD

[@drexxboban8277]

For those in need, new version of IJ you go New Project -> select (under nodejs) JVM it is already an IDEA, and the rest is similar to his. As for creation of new kotlin files mark src as root folder by clicking right click on it and then select `Mark Directory as` and `Sources root`. Then in src->main->kotlin create new files by right click->New -> plenty to choose from.

[@Lucas-hh4oh]

This is the best kotlin crash course, I've ever found on youtube! Really good video for a refresher

[@branmuller]

Wow you should make a udemy course. You explained the concepts soooo well! I will come back to this video if i ever need a refresher for OOP

[@ismailnurudeen]

Kotiln is currently my preferred programming language. Absolutely beautiful!

[@KeithDCommiskey]

If you are not getting the empty folder structure as shown in the video, and the "Kotlin" selection [@8:30] shows additional options not shown in the video, from the "New Project" menu, try instead selecting "Java" -> "Kotlin/JVM".

[@steelcardoza5361]

Oh my goodness thank you, I just spent the last hour trying to figure this out

[@jesusbohorquez2098]

Bro, you are amazing, I have been struggling with Android because almost all tutorials overcomplicate things, yet , you on the other hand, you make it so simple. Thank you, pal

[@andilesimelane4771]

its amazing loud and clear, thanks to Brad for making its easy fr your million subscribers to easily find out about other great teachers.

[@thomasgeorge7473]

I've had some trouble making a Kotlin project on the new IntelliJ IDEA 2022.2 version. You have to start with a general New Project, then select Kotlin for the langauge, select IntelliJ for build system, and also tick 'add sample code' to get it to work.

[@Channel-iu6de]

Your definition of the word Abstract is the first time its actually made sense. Thanks for that.

[@fing4186]

This was great for me ! I am coming from Java and wanted to get on board with Kotlin quick, without the unnecessary fat which you can find in most of the other courses. Thanks a a lot !

[@pedroserapio8075]

Thanks for taking your time, hard to follow with the new IntelliJ IDEA 2021.2.

[@Salehalanazi-7]

He explains interfaces like way better than a college professor.

[@wondersled5948]

You're an amazing teacher! All of the concepts were masterfully explained, and I grasped them almost immediately. I'll mess around with Kotlin a little to get a hold of its in and outs, and then I'll watch your video lesson on app development. Thanks again!

[@abdallahalkhassaky9506]

Hey Brad, just wanted to let you know that I love your content man, please do some more videos on data structures and algorithms, I need some to ace my upcoming interviews ;)

[@TraversyMedia]

It is something I have been meaning to do. I was trying to think of what MY next video would be. That could be it, we'll see :)

[@SB-df8vy]

@@TraversyMedia yes please, I second this motion

[@abdallahalkhassaky9506]

@@TraversyMedia Thank you really much man, we appreciate it, I read many books and I am still struggling with some of them lol.. Keep up the good work👍

[@jacksonbodra6450]

@@TraversyMedia 1.32 M (your subs) :- YES Please !!!

[@banszkiviktoria]

"Lamborghini, Penthouse, Rolex.... just a normal purchase for a programming KZbinr..." :D :D :D

[@WZLR]

Kotlin is my favourite language of the ones I’ve used. Syntactically it is beautiful and it just makes sense.

[@grampygamer8584]

I've wanted to learn Kotlin for ages! Thank you so much, and a big thank you to Brad!

[@ahmedn.4085]

My advice on programming for the fellow wanna be programmers is this.... Consistency is the key and if i or he can! You can too

[@kskfernando2945]

Ok

[@damovex]

@Philipp Lackner so the I (OR) is referred to as the PIPE symbol So II is the Double PIPE. Thanks for sharing your knowledge. Very clear explanations. You go further than most with the syntax and some edge cases and clarifications. Very helpful.

[@aprendendoviolaoem5minutos600]

Perfect introduction of Kotlin for begginners, thank you!

[@jonasnghidengwa7186]

Damn,,, bro this is crystal 🔮 you have really explained everything to the extent that ,,, even those that do not have an idea what programming is ,can grasp everything... Thank you for this bro keep up💙🤜🤛🙏

[@Shrooblord]

Thanks a lot! Very nice and thorough introduction. You pointed out some great little nuances about the language that already make me excited to get started. :) For extra credit, the final function you write -- the generic customCount() extension... if we want to be 'clean', we should rename the variable 'string' to something like 'type'. So, "for (type in this)" etc. It pays off to have your variables named properly ;)

[@armadillo85]

This is such a big help! Thank you!

[@codinginflow]

Wow 😍

[@mathumacharia6225]

Hi man, your videos introduced me to kotlin and android development. I hope you get featured in brads channel someday. Big thank you @coding_in_flow

[@xD-saleem]

I knew phlipp lackner from his channel and im happy hes spreading his knowledge on other channel :)

[@LaurentLaborde]

Best real world explanation of abstract class i ever heard.

[@RahulAhire]

I'm really glad that kotlin look 80-90% exactly same as JavaScript which will help web developers learn kotlin easily for native mobile development

[@lasse3412]

Thanks for this channel. Now I understand Kotlin more where others channels overcomplicate all time.

[@tomkerr8155]

I'm trying to follow this tutorial but the options and sequences are not showing the same on my version of IJ. Do you have an updated version?

[@TheRealLucifer-Morningstar]

i have the same issue

[@KeithDCommiskey]

@@TheRealLucifer-Morningstar I found there were two differences in what I was seeing and what is in the video. I posted potential solutions to both of them in the comments (sort by newest). HIH

[@andrewiglinski148]

Awesome dude. I've been meaning to learn Java for a long time. I'm definitely going to be a new subscriber to your channel bud you did a great job on this one.

[@johanesalberto6136]

thanks for making me understand kotlin

[@manuelvisak1396]

Very comprehensive Tutorial for a Java familiar Programmer. Good Job.

[@NivagSwerdna]

This was fun... played with Kotlin a couple of years back and this is a good excuse to revisit it... might use it for adventofcode this year.

[@senkssenks]

Your content is crisp, Thanks a lot for that, keep it up.

[@edwardkats]

Great video, but there's something missing: if you refer "there will be an error" - you can do one more step to show this error, rather then describing the error.... "see it once is better than hear it 100 times" Thanks again for the video!!!

[@chadpaulsen8751]

i'm using videos from this channel instead of books for classes, it's soooo much easier

[@anujgorasia]

Hey Brad, Thanks much for the course. It helped me significantly to jump start Kotlin.

[@BlueIsLeet]

This video really got me going on kotlin and helped me understand it. Thanks

[@codingcrashkurse6429]

Great Phillip, really great to see a german developer on the rise. Your presentation is inspiring, very clear and on spot. Hope to see myself in a similar position in some time :-)

[@PhilippLackner]

Thank you, wish you the best with your channel! :)

[@mkgamingentertainment3786]

I like this video because he almost explained every necessary concept in Kotlin

[@AbdallahSamir-x4w]

Thank you for this crash course and we need more videos like this.

[@jordigarciapena7180]

Nice job Philipp! I'm intending to move from Java to Kotlin and I was looking for a nice way to dive in! This video just did the trick! Thanks really!

[@notstorm]

I am having a problem when I try to create a project in my ide I have to select the build system, by selecting the default one i have many other files in my project folder such as gradle and stuff and inside the source(src) folder I have 2 more folders and 2 subfolders inside those 2 folders, and upon creating a Main.kt file I don't seem to have the run option any help will be appreciated

[@naomidemeer2445]

Hi! I had the same issue. In case you haven't figured it out yet: For me it worked to create the file under src --> main --> kotlin. All three folders already existed. By creating my new kotlin file there, I was able to get the same screens Philipp gets and run the Hello World program. Hope this helps. :)

[@notstorm]

@@naomidemeer2445 I really appreciate the help u rendered, I figured it out after experimenting myself and it worked :D and can u please update ur comment saying that u need to use "intelliJ" build to have such folders it won't work in other builds since rest of the folders aren't there :p I give my heart felt thanks to you once again

[@suneet2193]

Just to put it out there...I was not able to RUN the code initially...it just showed the 'EDIT CONFIGURATIONS' option. The solution was to just press RIGHT CLICK on "src" Folder ---> Mark Directory as ---> Sources Root.

[@rohitkf8474]

Really loved the way he taught kotlin and explained everything so clearly. Looking forward to his android crash course. Thanks a lot Brad❤️

[@SillverBel]

(Opens Kotlin) - Kotlin not configured - No option for .kt - Won't run "Hello World!" - Red everywhere. I love code :)))))

[@robertmarsman2055]

Great tutorial. But im stuck at the begging even after following the instructions. After clicking on "src ew " I do not see Kotlin Edit/class option. Version: Intellij 11.09.01

[@tomkerr8155]

Me too

[@KeithDCommiskey]

@@tomkerr8155 I also just ran into this issue. You have to mark the top folder (in the Project pane; with the project path next to it) as being the "Sources Root". Right-click the folder and use the "Mark Directory as... -> Source Root" option. Then the "Kotlin Class/File" option should become available from the File -> New menu.

[@cnorris1193]

3/16/2021; my version of IntelliJ does not have the same options; from installation as far as @10:43 I'm trying to follow along, but I cannot however, you are an excellent instructor and I approve of this video

[@steelcardoza5361]

Having the same issue, when I right click on .src I can't create a .kt file. I can create a .kts file though.

[@MisterWealth]

My kotlin-crash-course - src has files in it, his doesn't. It has a main with kotlin and resources, then has another folder that says kotlin and resources in that one as well. What do I click? Neither are allowing me to view it..

[@gpiludu]

If anyone got stuck with the Main.kt file, in IntelliJ 2020.3 (or whatever the version after the video's is), I had to put the file at src/main/kotlin/Main.kt

[@arslanrasit]

Up you go!

[@ihabtanvir8075]

Dumbstruck at how good and huge this channel has grown. Keep it up, Brad 🔥

[@davidgentilli7944]

Thanks for this tutorial. It was exactly what I needed to gain a bit of familiarity with Kotlin quickly.

[@Gokuderathestorm]

The JDK has moved and intellaJ has changed. Could you do a modern video ?

[@akashgeorge5433]

code at 35:47 is not working...it says number format exception....i tried to input 1 number and then skipped the second so as to get null...what has to be changed?

[@phobic1172]

The JKD download page at 07:00 doesn't seem to work anymore and redirects to Eclipse Temurin. Any idea what I should download from there, if anything?

[@artyomfromsib]

Tbh "for" command didn't make sense. I just couldn't get it

[@ReneMeier-ew4ry]

very helpful, thanks!

[@linusperez2158]

It has changed alot, "main" already existed for me

[@louiidelosreyes742]

Done watching the full video of this tutorial! Thank you sir! :)

[@dreddirt]

I am new to app development and I can see how this crash course can help me. This new version of Intellij IDEA will ask me to choose Target JVM version and Test framework when adding a new project. If you can help me out, that would be really amazing.

[@디구산]

Thanks a lot. One of the best in KZbin.

[@ashortstorey-hy9ns]

Such a great introduction. Thanks, Philipp!

[@alejrandom6592]

this is really good, thanks for creating this channel :)

[@mohamedhussein5106]

Very informative. I got everything except for the lambda part but that's not a big issue. SHOKRAN!

[@JeffPohlmeyer]

I know this a general purpose video on Kotlin and not necessarily an Android app video (which is coming next) but I'd imagine the next logical step would be having someone on for a Swift tutorial, no?

[@themindsetgarage]

kotlin all the way.Would love to learn more on ktor language

[@mw8151]

"Real programmers use dark theme" :). Thank you for this crash course, I learned a lot and it was fun. Keep up the good work!

[@tanzimibthesam5861]

Is Kotlin easier than Java with a bit of modern day syntax?

[@PhilippLackner]

I wouldn't say learning Kotlin is easier or harder than Java, but once you know it, you can do things easier than in Java and in less code

[@khodjanadir3891]

The best crash course i could find , thank you

[@MonaDangerW]

Hey! Is there a new updated video? The programs are updated and dont look the same anymore. Thanks

[@jawad9757]

omg i was thinking of learning kotlin and this popped up, i think its meant to be

[@rcorreia23]

If you talked about it next to your phone or computer mic big brother google must have heard it hahahahaha

[@MisterWealth]

54:20 I guess I don't completely understand why are you writing it so differently for the isOdd function? Can the even and isOdd function be written either way?

[@flutterninja1]

Wow, I was off for a while am back for the real stuff😍😘😍

[@MysticMac000]

Amazing course, thank you! I will watch your Android course next

[@Nae_Ayy]

i dont understand everything is completely different than the tutorial is showing, all the options are different

[@sunshine_grass]

Thank you for your teaching! I benefit a lot from it!

[@quantumcd1045]

I'm getting a "NumberFormatException" when I run the code at 35:50.

[@maruf_r]

Watch 1:08:00

[@JonnyRootsDem]

My dog function wont print "Woof"! I don't know if it's got anything to do with the version of IntelliJ I'm using, which is 2021

[@alessandrod.306]

Very good video for beginners I really liked the examples and the way you explain everything. Keep up the good work.

[@HariKrishnan-es6po]

Philipp, You are a great teacher. explained well,

[@rubenlarochelle1881]

3:31 I love how says "Don't worry" to say Edge isn't his favourite browser ahah

[@DevMadeEasy]

Great content, thanks for sharing it!

[@banszkiviktoria]

fantastic video! :) thank You for putting it together!

[@anouar.abdelmalek.derdouri]

Very good introduction to Kotlin

[@SalomDunyoIT]

wow! I have been waiting for this course!

[@LawrenceDCodes.]

This is right on time for something I'm working on. Thanks

[@BigWhoopZH]

To be fair Java is catching up quite a bit in recent versions. So I'm not sure if Kotlin will ever replace Java or the other way around or if they just continue to coexist. It seems like Oracle accepted the challenge. Nevertheless it is a great achievement for Jetbrains to play at the levels of Google and Oracle. And their IDEs already wiped the floor with their competitors.

[@fernandozolubaspreto6976]

Thanks Phillipp it was an awsome course!

[@tojal]

This was a great crash course, thank you very much for putting in the effort :)

[@hilmiamir3514]

Well done. Very precise for beginners!

[@MrDlnggorton]

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