Charles Oliver Nutter

This year marks a big milestone in my history working on JRuby: twenty years ago, I joined Sun Microsystems to work on the project full-time.

Ever since JRuby 10 upgraded to Java 21, I’ve been re-learning Java with all the excellent language enhancements of the past decade.

In my previous post, I showed how to use Warbler to package a simple image-processing tool as an executable jar.

Warbler is the JRuby ecosystem’s tool for packaging up Ruby apps with all dependencies in a single deployable file.

Java 9 added the ability to mark a @Deprecated annotation with a “since” version, so we figured it was worth updating JRuby.

At the end of my post on JRuby and JDK 25 startup time features, I teased a bit of the unreleased improvements from Project Leyden.

JDK 25 is the newest LTS release since JDK 21, and it ships with a gaggle of amazing VM-level features.

After playing with JFreeChart and JRuby and writing up a lovely blog post called “Beautiful Charts with JRuby and JFreeChart” it seems that some folks did not agree with my assessment of the charts as “beautiful” and others did not realize the power of wh…

I recently returned from RubyKaigi where I had the opportunity to sit down with members of the Japanese Ruby community and show them a little bit of JRuby.

I am very excited to introduce you to JRuby 10, our biggest leap forward since “JRuby 9000” was released almost a decade ago.