Archive

Collection of notes on Java 21

Virtual Threads:  a performant alternative for io intensive applications for async frameworks. Not using an async framework tremendously simplifies your code. Code complexity has an enormous projection on everything else, especially when talking on the business level. First and foremost the cost of development and time to market rises. And then comes the cost of maintenance. -- via

You can use jlink to create a custom runtime you can distribute with your application, so that your users don't need to download a JRE/JDK. You'll still need to run this with the java command. You can use also jpackage to create an executable file you can just double-click (.exe on Windows, whatever on mac and linux). -- via

A categorized list of all Java and JVM features since JDK 8 to 21 - Advanced Web Machinery

Modern Java - an online book; a 2026 approach to learning Java in bite-sized lessons. Don't have to start in an IDE for one.

Internals

• Overhead of Returning Optional Values in Java and Rust | Piotr Kołaczkowski
• Writing a Profiler in 240 Lines of Pure Java | Mostly nerdless

Articles

• Use Java for Everything (2014) and related Java in the small (2024).
• Java Best Practices | Jonathan Giles

Interesting libraries

Permazen Permazen is a ground-up rethink of Java persistence. It has been in production use in commercial software since 2015.

 Instead of starting from the storage technology side, it starts from the programming language side, asking the simple question, "What are the issues that are inherent to persistence programming, regardless of programming language or database storage technology, and how can they be addressed at the language level in the simplest, most correct, and most language-natural way?"