Java 16

(mis)using modern Java

Modern Java is really awesome when it comes to “Hello, World!” demos. It’s also cool for a sophisticated systems and algorithms, provided their authors write code which obeys a few fairly simple contracts and avoids obvious traps.

There are a few mantras regarding recent features of modern Java, such as:

  • records can replace JavaBeans everywhere
  • you never need to write hashCode() for records
  • pattern matching with instanceof is the best tool for equals()
  • just ignore --illegal-access and set it to permit
  • synchronize (new Long(42)) is the best for monitoring and so on.

This talk has been given at jLove, Doing Java Better and Java Day Lviv.

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

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.

Are you ready for Valhalla?

Many features and changes we see coming live in new Java version (if not most of them) are developed under so-called umbrella projects. We frequently see syntax improvements from project Amber, project Jigsaw is about bringing modules, project Loom (surprise, surprise) is about new threads, project Panama roughly speaking is about using native stuff safely and efficiently, and among the most known ones, project Valhalla starts to become a thing, thanks to JEP-390 being included in Java 16.

Illegal access in Java 16 A.K.A. 'My program crashes!'

Last year I wrote two posts about torturing Java records with Lombok. Fortunately (or not, depends on your point of view), Lombok’s team decided to end these sick plays. However, we don’t give up and go for builder!

Java 16. What's new and noteworthy?

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.

Surfing Java™ 12-16

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?