Stephen Colebourne's blog

At Devoxx Belgium 2025 I discussed the idea of embedded records with a few people.

A lot of good work has been done by the core Java team on patterns, providing new ways to explore data.

I'm going to describe a trick to get pattern patching on Optional in Java 21, but one you'll probably never actually use.

How do you start a Java program?

The last time I wrote about the timezone database on this blog, the database was under threat from a lawsuit.

The switch statement in Java is being changed.

Java has a number of literals for creating values, but wouldn't it be nice if we had more?

The Java ecosystem is made up of many individuals, organisations and companies producing many different libraries.

Should you adopt Java 12 or stick on Java 11 for the next 3 years?

TL:DR; Java is still available at zero-cost, you just need to stop using Oracle JDK and start using an OpenJDK build, such as this one or this one.

There is now a Java release every 6 months - March and September.

Moving from Java 8 to Java 11 is trickier than most upgrades.

From Java 11 its time to think beyond Oracle's JDK.

The Java ecosystem has always been built on a high quality $free (zero-cost) JDK available from Oracle, and previously Sun.

I use Eclipse as my Java IDE.

Java 9 introduced a major new feature - JPMS, the Java Platform Module System.

Java 9 is obsolete in just six weeks (20th March 2018).

This article in my series on the Java Platform Module System (JPMS) is focussed on automatic modules.

This is the next article in a series I'm writing to help make sense of the Java Platform Module System (JPMS) in Java SE 9.

The Java Platform Module System (JPMS) is soon to arrive, developed as Project Jigsaw.

The Java Platform Module System (JPMS) is the major new feature of Java SE 9.

The java.time.* API (JSR-310) was added to Java SE 8, but what has been going on since then?

Java has long suffered from the pain of beans.

Java SE 9 is slowly moving towards the finishing line.

Should local variable type inference be added to Java?