New Java Version 22 - The 3 Best New Features You'll ACTUALLY Use

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Java version 22 is out now! Here are 3 new features that you can absolutely make use of as a beginner or advanced Java programmer.
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Java 22 was release just a few weeks ago. Is it worth the upgrade? We'll talk about 3 new features in Java 22 that you can actually put into action in your programs TODAY.
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Hi, I'm John! I'm a Lead Java Software Engineer and I've been in the programming industry for more than a decade. I love sharing what I've learned over the years in a way that's understandable for all levels of Java learners.
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[@MelHaynesJr]

Java is older than many people using it, and it's amazing we are just now getting this String feature.

[@adiveler]

Yeah! C#, Python, and JS had this for ages!

[@JorgetePanete]

Not yet, they'll be iterating on it and is now removed.

[@boss50726]

I think java is now realizing that it will loose it's charm for new gen

[@allwoundup3574]

Because java is trash and was developed by a kiddie diddler

[@noJobProgrammer]

@@adiveler C# is just a copy of Java, there is nothing special in it

[@terrificfrogg8377]

The string template is amazing but having to begin with STR to make it work is just so Java

[@CodingWithJohn]

I think it's technically needed for backward compatibility, since without it if some string literal happens to contain \{something}, it would break when they upgrade the Java version.

[@PimPumSObaka]

+++ This whole feature literally screams JAVA lol

[@sstrenn]

Do you know why they couldn’t just put an f in front of the string, like python, to indicate a formatted string to the compiler?

[@DinMamma002]

@@CodingWithJohn How is it needed for backward compatibility? "\{" is not allowed by the compiler afaik.

[@havlli7544]

@@CodingWithJohn It is a design decision as well, from what I could understand from their latest talks about these new features the reason is to give developers the ability to create their custom template processors that can have additional logic, they gave the example of creating a custom SQL template processor that would have sanitizing included in the template processor logic itself so you could just call SQL."query with parameters" in the database layer and not to worry about sanitizing because that will be centralized in the template processor itself. You could use it to adhere to formatting standards for the queries and greatly reduce boilerplate code. There are more use cases for sure but I cant come up with any from the top of my head :D

[@sanin3213]

Return of the GOAT

[@Whizyrel]

😂

[@MrXperx]

I came from a JS background to a Java project and the lack of string templating drove me nuts. I started to use String.format which isn't that bad.

[@YouHaveTrouble]

in java 17 and up you can do "Some random string with %s format".formatted("special"); which is more convenient imo

[@MrXperx]

@@YouHaveTrouble thanks. I'll try it.

[@Kiyuja]

String templates sounds good but it needs a little work I feel. This is the same concept as string interpolation in C# and its a little more friendly, you just add a $ in front of a string and then use the same braces as with the preview here like: $"part1 {insert} part2". Its quick and easy to use. The "_" is also a thing called disposables I believe and it can be really useful. I am happy to see Java catching up a little and hopefully they work on asynchronous execution in the future.

[@nakarukatoshi]

The thing is that they decide to go with processors because programmers can create their custom ones, like custom HTML, YAML, JSON, SQL, ... processors that will sanitaze the variables I think some frameworks like Hibernate will implement different SQL sanitizer processors, and Jackson will do JSON and YAML processors for example

[@mukynas]

Don't we already have string format? You just have to add all the variables in the correct order at the end. My first language was Python and string templates looks very good and comfortable

[@Kiyuja]

@@mukynas yes, Java does provide formatting for Strings. However this is about concatenation. Oftentimes in programming you just quickly wanna combine information, like in error messages. This should be as friendly and quick as possible. String Interpolation lets you do just that. Imagine you have a variable x. In C# you can write $"error occured while parsing {x}". Because you marked the string with a "$" C# knows curly braces will reference data and not be characters and inserts the value in the string. Javas proposal aims for the same functionality but it seems quiet cumbersome...

[@thebuizelclub]

Why not just do both then. $ for the default and STL for custom implementation .@@nakarukatoshi

[@Mig440]

Unfortunately, the string templates feature has been removed for now from std. Lib since they want iterate on the design at bit further before releasing it to the public. Just good to be aware of.

[@terrycrews1584]

Dang, thought we will finally get rid of that pain in the ass of concatenation! 😂

[@davidc_ac9377]

It has always been experimental in v21 and v22. It was not removed, because it was never standard.

[@Mig440]

@@davidc_ac9377 true, but people might still think they can experiment with it on their own in jdk 23 and that will currently be impossible 😊

[@Okmeis]

Thank you for keeping us up to date.

[@paulthomas1052]

Thanks for the great intro to Java 22. Look forward to more !

[@user-io1uc3wy7d]

Amazing i am learning dsa using Java and love to work on it further as well.

[@LittleEngineCan]

Great to see you back! Like the new format and humor. Any updates planned for your bootcamp course? Would be great to see new modules added, or even a new advanced ‘part 2’ course

[@antonyrichard369]

Not to compare as I love Java too .. but the string template feature is something .Net has implemented a few years back and Unix operating system has it way way long back .. I feel like Java is more moving towards like a scripting language like python or Java script and more of functional programming ofcourse

[@boss50726]

Please make more videos John

[@dembro27]

They implemented my unreasonably favorite JavaScript feature, template literals, into Java. Finally!!! String.format is pretty good, though.

[@imohanthony]

This video presentation was so cool am considering picking up java again.

[@zfazzershroudvietcynide64e58]

Please pleaseeee make a video about Comparable and Comparator coz i really like how simple and easy ur explanation is

[@lootster]

00:01 Java 22 introduces new features for developers 01:46 Java 22 introduces unnamed variables 03:25 Using unnamed variables in Java 05:00 Java 22 introduces unnamed variables for unused exceptions and Lambda functions. 06:46 Java 22 makes running multiple file Java programs from the command line easier. 08:20 Java 22 brings multitfile program running and string templating as key features. 10:05 Java 22 allows string templating for cleaner concatenation 11:51 String templates simplify multi-line string manipulation

[@danhoelzel5339]

string templates was something I was wondering if Java had about 8 months ago when I started working on an android app using java. Glad it is finally a feature.

[@Sunnnix]

For the third feature, I always used String.format because it's easier to read

[@dirkniblickable]

“%s is even easier”.formatted(“This”);

[@alexandersagen3753]

Or just "my name is %s".formatted(myName)

[@nayankumar9113]

welcome back champion. thank for such a great tutorials.

[@VuLinhAssassin]

Hi Jon, your video was amazing. Btw, is there any remote position in your company?

[@nambipugal3329]

Hi John, Eagerly waiting for more videos especially on Spring Security 🙃

[@NBSgamesAT]

String templating is a thing from other languges and it works qithout having to add that str thing. But it‘s still soo good that after such a long time, Java can actually use a feature from other languages that is actually super helpful, makes me have a lot less issues with Java again.

[@deepakpothuraju6833]

Please make a series explaining the internal working of collection framework. Start the series with HashMap and HashSet. Then arraylist, LL etc.

[@MrAikien]

Thanks for the update 🙏. Really appreciate it 👌👍

[@PimPumSObaka]

Those features are amazing, but... the '_' underscore variable discarding was in C# since 7.0 and they should definitely add more like from there :) The syntax sugar in C# makes it much much much better to use, so when java introduces something like this it interests me again in making things in Java

[@sqlexp]

He missed the points of it, though. First, it is used to silence any "unused variable" warning (if Java has such a thing). Second, it saves the programmer from the need to come up with different distinct names for multiple unreferenced variables in the same scope.

[@raymondorenda7385]

Good tutorial there though I rather they ought to have used $ sign instead of \ for that String variable combination. A convention in number of languages. Besides, adding \ in xml with its cousin / already in abundance will bring more confusion.

[@paramdholakiya8857]

Using STR. String templates for Servlets. That's it. Thank you ORACLE gods. Writing Html in Java Servlet file has now became more easier

[@gsilva877]

😂😂

[@muaazkhan6156]

Please make a play list for spring boot every body needs to hear from you 🙏

[@zachariahtatman7381]

wow java finally coming out with basic features that have existed in other langiuages for years. i might actuially enjoy java in 5 years.

[@paulmanuilenko7894]

Thanks a lot for the overview!

[@i_say_uhh]

String template looks so niceee

[@dirkniblickable]

In lieu of chapter markers: * 1:43 - Unnamed variables * 7:03 - Compile and execute multi-file Java programs from command line * 9:14 - String templating (preview only)

[@suikast420]

Unnamed variables have the big advantage of heap allocation. The can write the result of a call to something like dev null heap.

[@rubens_cube]

Hey John, another great video, thank you! I was wondering if you know something about Java Serialization? It is a topic I would love to see in a video, because it is very useful, but it feels like magic to me. I would love to see a good explanation of it so I know how to use it properly!

[@alexandersagen3753]

Just a heads up, most do not recommend java serialization (Serializable and so on) as it has had so many extremely bad security vulnerabilities forever. The recommended solution is to serialize the objects to json or whatever format you prefer and use that. Many great extremely fast libraries for most if not all formats you could think of

[@NadChel1]

String templating is awesome. I was hoping for something like this for a long time. Though I wonder why they didn't go with backticks like JS with its string interpolation. STR is less appealing to my eye

[@simulbista8846]

Great to have you back.

[@vibingowsic2338]

Miss your tutorial John ❤❤

[@CGDW2]

Unnamed variables I will use occasionally, but String templates are really nice. I do sometimes use String.format() or printf() rather than concatenation, but they still feel kinda clunky in their syntax.

[@CodingWithJohn]

Looks like it's unfortunately being removed even as a preview feature in Java 23, but hopefully to return in an even better format in a future release.

[@theroyaltygamer8436]

Hey john love your content please make more videos

[@Unknown373d]

best java youtuber

[@MusabYK]

Agreed

[@xtunasil0]

Java is finally catching up on basics features it was missing. About time!

[@withgrowinginsanity198]

11:49 what about the existing feature "my name is %s".formatted(name); no STR and very confusing looking (especially inside HTML) "\" needed ...

[@tanujabhatnagar]

Could you please explain different types of design patterns used in java as well? and when to use which one?

[@lakrinmex8132]

I didn't know about triple quote making it multiline string. I just tried and it worked in the java version I currently use. Unrealted: Why doesn't my intellij(community edition) suggest whole lines like yours does? like when you typed Cat myCat it showed "= new MyCat(); tab to continue"

[@avalagum7957]

If you could talk about structured concurrency and stream gatherer, that's really great.

[@74LS_NE555]

how did you get that vanity url for the video ?

[@omitobisam]

Unnamed variable seem to be idea of matching a pattern. If it does not match any pattern, then you can use an underscore. Example in F#.

[@amilasilva7]

Can you make a video about : How quickly adapt to new Java features from java 8 to 11/17/21/22. (what new features we can use over legacy features.)

[@tanujabhatnagar]

Could you please create a video explaining double locks, volatile and synchronized keyword? It would be really helpful 🙏🏻

[@ilyriadjaajdairyli6352]

Thank you its very clear explained

[@younesdamous]

I watched a lot of your videos and I benefited a lot from you in Java... I am from Algeria... Thank you and I hope we meet one day

[@user-qy4rs1oi5n]

Hi John, I am thinking of doing 1Z0-819 or 1Z0-809. Which one is more relevant?

[@flaviuvanca9289]

Great video John. The new String concatenation is a game changer. The blank _ is a bit silly, but I welcome it, might be useful occasionally.

[@alandoe6622]

If you come from python, you know it's useful.

[@flaviuvanca9289]

​@alandoe6622, I'm planning to learn Python in the future so it's great to gain that extra knowledge.

[@delsix1222]

what's the reason for using String.format() now that string template exists?

[@pablocaiza.]

string template is awesome, is similar to template stirng in javscript :D

[@wannacry6586]

Anyone know what setting enables this type of auto completion 2:03

[@user-ke1jq3ge7c]

John you are a person that has his concepts in Java solid (Im reading a nice book now called Weld I find there messy explanations of POJOs and Java Beans.) Could you tell me what are books on Java and Java EE that according to you are really good references?

[@kalvakolusubhash8832]

Please make a video on how to load all the project classes during runtime.

[@theminingpro]

That in string variable thing is a game changer for sure

[@David-rz4vc]

C# has the underscore. it's useful in a try catch when u don't want to do anything with the exception

[@ricardoid]

Great video! every Java improvement Scala has it many yeas before 😮

[@lionelsimon7613]

Yes, they just are following that path after so many years. Poor java . However, Scala devolpers are taking now new languages, such as rust, Haskell.

[@LucaCattaneo-xz5mu]

hey John! i know this might be a strange request but i was wondering, could you please do a tutorial on RMI java server and RMI java client? i know, it's an outdated function but i went throw many tutorial and forum to find good explained code, but none of them was accurate, expetially when your code create thousand of error even in the compiling phase. if you decide to do it, could you please also cover all the commn errors and mistakes that could generate? thank you.

[@sadiulhakim7814]

I saw one issue in StringBuilder today. I had to build string inside a while loop. Inside that loop i was creating a StringBuilder instance and creating the string. Later i wanted to make the StringBuilder outside the loop. But i was appending something in the string builder inside the loop. After appending and generating string i had to clean up the string builder for next iteration. I could not clean the string builder. I tried setLength(0), delete method. But the bytes inside value array still exists.

[@jelmerterburg3588]

What is the issue, exactly? The values of the internal char array of the StringBuilder do not matter, setLength(0) is sufficient to reset it. StringBuilder does not perform any unnecessary operations on the internal buffer.

[@sadiulhakim7814]

@@jelmerterburg3588 I am not sure but at that time setting length 0 was messing things up.

[@mohamedsameh3678]

I'm impressed by your knowledge of Java versions! Since Java 9 there have been many new features. Would it be possible to create a concise overview of the key features introduced in Java 9 through 22? This would be a valuable resource for developers, and I believe your ability to explain complex topics makes you well-suited for this task.

[@ChemicalVapors]

The quick fix called it "STR Processor". Are there other processors? What can we do with them?

[@gamehacker5692]

Can we get a video on the Java turtle functionality, I know how to use it in python but can’t get the syntax fully in Java

[@adamrigely3607]

Wait, you create these awesome videos AND play TBOI? Now I appreciate you even more!

[@harshitkrvishwakarma3602]

Java is becoming javascript but with types. I love it.

[@SweetDemon11]

John could you talk about Java Modules please, i appreciate your content

[@fizzcochito]

Looking forward to using this once we upgrade from Java 8 in 23 years

[@baay81]

thanks for sharing!

[@amilasilva7]

Hay love your videos on youtube. Supper easy to understand.

[@fifofuko1864]

Maybe you might want to use unnamed references for constructor functions? Idk if this has any use.

[@fernandosantiagovillegas6556]

The first feature is the same or similar as python, so i think knowing how underscore works in java would help for understanding how it works un java. The string template also seems similar as the fstrings in python,

[@Guywiththetypewriter]

Hey John, have you ever considered doing a few videos on jdbc and stuff like HikariCP? It seems to be a massive gap in the tutorial landscape when it comes to your level of quality.

[@reyhanau50]

Hi John, will you start to teach us about Spring Boot material someday?

[@noodleslee4871]

String template is lit!

[@johnmckown1267]

The _ and string interpolation (f strings) are in Python too.

[@FahadAyaz]

It's nice that Java devs are able to use these now. I feel blessed that we've not had to put up with these (and have a lot more loveliness) in Kotlin for years now. Going back to Java definitely feels like a step backwards

[@leogcavalli]

Great content, as always

[@deepakyadav-ny2cj]

Please increase the frequency of you appearing with new video, we really wait eagerly.

[@FonPacific]

While PHP moves towards Java, Java implements features PHP has been having since long time ago. I find it funny yet interesting!

[@ZachariBarnes]

Grats on the sponsor!

[@iparadoxg]

Welcome Back John! ❤

[@DekelGilboa-pv2je]

The string template option is already existed in 21 preview

[@mayurlaniya5049]

Awesome presentation!

[@faisal6621]

Why there is a warning with underline for STR? What is that?

[@jackeblan]

Funny thing is why the heck do we need to have STR?😂

[@user-hn1cy5ee5l]

regarding strings template, why just don't use f as a prefix to the string like in python? String message = f"My message is {msg}", isn't it easier? Better implement a wheel rather than look up for other approaches

[@VANTYCSolutions]

Awesome video thank you.

[@advsaifkhan8938]

One thing is very good to Java that Java advances slowly but safely.

[@frederik_hd]

unnamed variables as well as multi file compiling + executing (although I've never needed something like that and never will) i like a lot. but I don't like string templating with STR. at the beginning of the strings maybe I would like it if you can leave out the STR.

[@adiveler]

It still better than: "My name is " + name + "and my age is " + age; And than: "My name is %s and my age is %d", name, age; Also, other languages do something similar too, in C# you need to put $ before the quotes, and in Python, f.

[@CodingWithJohn]

I assume the reasoning behind needing STR is backwards compatibility. If some existing string happens to use \{} in the string literal it would break with this change.

[@balogunoluwatobijohn154]

Please can you do us the favour of doing a tutorial on random access file. Thank you

[@user-xe5pk5pn2u]

Keep uploading these awesome videos. I NEED IT.

[@justhorse3584]

Hi John, I would like to hear your opinion about oracle java certificate. Please help me out. I am 3 years old java developer and my next target is getting this certification. However, I am not sure if it is worth the effort in 2024. Especially with the rise of AI.

[@bartoszbudzynski8761]

Honestly, as I code in Python most of the time nowadays and lost touch with Java, I'm always surprised how long it takes for Java to get the super basic features of a modern programming language. Groovy has had GStrings since forever, if we want to compare it to another JVM language.

[@mzallocc]

Groovy is a real cool language. Way better designed language, way less verbose, multi file compilation and run been there since day 1, closures/lambda much more intuitive and easier to code, gstrings, multi line comments with variable substitution, a bunch of imports by default, and println "hello" instead of System.out.println('hello"), and a lot more.

[@gozdediri7846]

Thank you! you are the best!!

[@csabab.5689]

hi...can i ask you something? does it even make sense to learn programming because of artificial intelligence?

[@denver3703]

Hello John, can you cover RegEx in java

[@tigerstyping]

Great video, but I'd make sure to caution against using template strings for HTML! If you're processing user input, you should always sanitize the values before putting them in your HTML, preferably using a trusted library.

[@imakhlaqXD]

Java seriously need to work on its syntax make it someting like Kotline. And remove those legacy stuff and old stuff. We really need a java version with breaking changes and whole rework.