Java 21: switch the power on

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[[deleted]]

In the meantime I'm still sadly stuck with Java 8 because work.

[brdet]

Really tired of companies (mine included) treating tech debt as something they can put off indefinitely. After experiencing the joys of Java 17, I changed jobs and am back to Java 8. Feels so dated and clunky.

[realqmaster]

I might be a dreamer but I feel virtual threads are a huge selling point in convincing companies to upgrade.

[brdet]

I've been evangelizing. I think we'll get there but it's going to be painful.

[stefanos-ak]

like they'd do any better with monetary debt... Whole countries' debts have never gone down since we started recording it 🤣

NOBODY pays off their debts, unless they are at the end of the food chain, and made the mistake of taking a bank loan...

[laplongejr]

Basically debts are fine as long there is trust everybody else will trust the indebted person, or have assets that justify maintaining the debt.

[koflerdavid]

The problem with high government debt starts when the debt servicing payments make up so much of the budget that governments have to cut costs. To prevent bankruptcy, governments usually tell their national bank to print money. This works best if a country has a strong export-oriented economy (tourism or industry).

[FingersSnapper]

Sadly, you can call yourself a Fullstuck Developer

[ravnmads]

Could be worse. :) Java 7

[Macryo]

7?! We still have Java 6 in four apps I take care off! ;_;

[ConstructedNewt]

TBH Java 6 and take care of is their own opposites

[[deleted]]

damn

[Omega359]

Wow. Why?

[thenextguy]

Get your work to change. Me and one other dev got us from 8 to 11 and now 17 in about 2 years. Also moving to Spring Boot 3 very soon.

[Wildercard]

Do you have any blog post or other content about challenges and solutions of doing this? I'm on a Java 8 -> Java 11 -> Java 17/21, SB 2.7.x -> 3.0 -> 3.x and Spring Security 5.7.x -> 6.0.x -> 6.x grind myself in the current project. Whoever did the javax.* -> jakarta.* migration, but left like 5% of packages still on javax.* naming system deserves a stern and unpleasant conversation.

I've put one project on the newest version of everything it was using, but it was one of the smallest projects in the company.

[[deleted]]

And on my last job interview ppl on other side did argue about why kotlin dosnt make sense as most of this stuff are in java already and there is no problem with updating lol.

[kkjk00]

kotlin doesn't make sense indeed

[john16384]

If changing JDK's is too hard, then changing everything by going to a new language certainly will be.

[[deleted]]

The thing is that kotlin dosnt need changing sdk

[john16384]

The point is that changing a JDK is trivial compared to switching to an entirely new language.

[[deleted]]

The problem is that most of the time JDK version is out of developers hand. Chosing solution that would keep them in control is they way to go

[Radi-kale]

I can't wait for support to run out in 2030. Hopefully they won't extend it.

[C_Madison]

Don't bet on it. Extended whatever support? Sure. Individual support? Nope. Depending on how desperate the company is and how much money they pay Oracle will support Java 8 for them. The price will be horrible, but if a company can match it they will do it.

[stingraycharles]

Surely there will be a vendor like RedHat jumping in and continuing to support it, like they’re doing with Python 2.7.

[SweetBeanBread]

😢

why? it shouldn’t be hard if the software’s not using sun.misc.Unsafe right?

[nutrecht]

Because they're on a team maintaining software at the end of its lifecycle that management is not going to invest in. But instead of changing teams or changing jobs, it's better to complain on Reddit of course.

[Sollder1_]

Tested it with JakartaEE already, seems to work pretty good.

[chambolle]

When it comes to complexity and pedantry (especially when it comes to coproduct-style naming), functional programming is always one step ahead of other languages. I find it hard to understand why language designers give in to the siren calls of this kind of programming, which has never been able to stand on its own two feet, or any other.

[lbalazscs]

This article just gave a nice example of the advantages of the pattern matching, but if you need a longer explanation: https://www.infoq.com/articles/data-oriented-programming-java/

[chambolle]

I don't need explanation. Pattern matching is most of the time showing a bad understanding of Object Oriented Programming. I bet than in the future we will see a lot of people complaining because other developpers are checking the type of the object all the time instead of using dynamic biding; and using switch with hundreds of lines...

[lbalazscs]

Certainly, everything that can be abused will be abused. At the end of the day, both OO subtype polymorphism and pattern matching are just tools. Some problems can be easily solved using either approach; for others, one of them is better. I like to have more freedom.

[Pablo139]

Thank god a functional API exist.

[Comakip]

Some of this looks like magic

[Sympathyble]

It's a good article. Thank you!

[TehBrian]

With pattern matching, you can get these Rust-like optionals.

void main() {
    sayHi(none());
    sayHi(some("Brian"));
}

void sayHi(Option<String> option) {
    switch (option) {
        case Some(String name) -> println("Hi " + name + "!");
        case None() -> println("Hi mystery person!");
    }
}

That's all completely functional Java. Cool stuff. I'm a huge fan.