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Java 16 & 17. What's new and noteworthy??

Tue, 12 Oct 2021 10:00:00 +0200

Another (half a) year has passed, another major Java™ version has been released. Java was supposed “to be slow”. However, Java turns out to evolve so fast, that next releases aren’t just version bumps, but might significantly change the rules of the game. That’s a good reason to check out what’s new in Java. We’re going to cover:

Records, where and how to use them, apart from DTO/VO
Pattern matching with instanceof A.K.A. Smart casting
Sealed classes, new dimension of types extensibility (for inheritance)
Warnings from Jigsaw (–illegal-access strikes back!)
And Valhalla (for value-based classes abuse)
Talking to native stuff from Panama
and more.

All visualised in actual code, not just slides.

I was able to talk on Java 16 and 17 for more almost 3 hours at Devoxx France and also at Devoxx Poland (but the video hasn’t been released yet.)

Java 16. What's new and noteworthy?

Thu, 06 May 2021 10:00:00 +0200

Records, where and how to use them, apart from DTO/VO
Pattern matching with instanceof A.K.A. Smart casting
Sealed classes, new dimension of types extensibility (for inheritance)
Warnings from Jigsaw (–illegal-access strikes back!)
And Valhalla (for value-based classes abuse)
Talking to native stuff from Panama
and more.

All visualised in actual code, not just slides.

I was able to talk on Java 16 for more than 3 hours is total thanks to joined initiative of WroclawJUG and SilesiaJUG.

Part one (covering almost everything except records and trivia):

Part two (covering records and some trivia):

Surfing Java™ 12-16

Thu, 15 Oct 2020 10:00:00 +0200

In the dark ages, we had to wait for 3-4 years to see the new Java version with some new features. Now there are two major releases every year! Can we benefit from the new features before the next LTS release?

We don’t have to wait 3 years or so for new features any more. Isn’t that cool? 😉 So… you’d like to check what has happened since Java 11? Record types? Switch expressions? Pattern matching? No more NPE? String blocks? New functions in APIs? What are the Shenandoah and ZGC about? AppCDS to speed up spin-off?

If you find them interesting, let’s check out together new interesting stuff.

In this talk (because it’s limited to 45 minutes) I’m able to merely scratch the surface of the changes. Please don’t confuse it with a deep dive.

I was able to give this talk at e.g. Java Developer Days, Od Kodera do Developera, CodeMotion Spain.

Java 15. What's new and noteworthy?

Fri, 09 Oct 2020 10:00:00 +0200

Another (half a) year has passed, another major Java™ version has been released. Java was supposed “to be slow”. However, Java turns out to evolve so fast, that next releases aren’t just version bumps, but might significantly change the game rules. That’s a good reason for another deep dive in Java. We’re going to cover:

Production ready GCs: ZGC and Shenandoah, if you don’t like ice ages
Text blocks, which make Strings easy to declare also for non-liners
Pattern matching with instanceof A.K.A. Smart casting
Records, where and how to use them, apart from DTO/VO
Sealed classes, new dimension of types visibility (for inheritance)
Hidden classes, which are so hidden, that they can’t even use themselves
Foreign memory access, for some off-the-heap data
Helpful NPE messages, which make chasing nulls easier than ever

And of course removed, deprecated and tuned stuff (bye bye Nashorn). All visualised in actual code, not just slides.

So far this presentation has been delivered (as a Deep Dive) in Polish only, for WarszawaJUG. Unfortunately, during the streaming there were some… resolution challenges ;-)

That’s why if you’d like to see my screen only (no organisers’ slides and talking heads), it’s possible as well: the FullHD recording has been published on YT.