Sealed Classes

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.

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.

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?

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.