Improve Your JUnit Experience with this Annotation

JUnit is probably part of 90% of all Java projects. And the exciting thing is, we’ll soon have JUnit 5…

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10 Easy Steps to a Complete Understanding of SQL

Too many programmers think SQL is a bit of a beast. It is one of the few declarative languages out…

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Ceylon Might Just be the Only (JVM) Language that Got Nulls Right

Here we go again. THAT TOPIC. But hang on. The approach discussed here (and in the Ceylon language) is not…

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SQL JOIN or EXISTS? Chances Are, You’re Doing it Wrong

I’ve noticed this very consistently with a lot of customers, and also with participants of our Data Geekery SQL Workshop…

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Java A’s new Local-Variable Type Inference

News could hardly get more exciting than this, for a programming language aficionado! There is now a JEP 286 for…

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UI Developers! Choose Sensible Default Ordering!

Good decisions come from experience. Experience comes from making bad decisions. ― Mark Twain Today, let’s look at one piece…

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How to Support Java 6, 8, 9 in a Single API

With jOOQ 3.7, we have finally added formal support for Java 8 features. This opened the door to a lot…

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A Very Peculiar, but Possibly Cunning Kotlin Language Feature

This has caught me by surprise. After studying the Kotlin language to learn about how to best leverage this interesting…

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(Ab)using Java 8 FunctionalInterfaces as Local Methods

If you’re programming in more advanced languages like Scala or Ceylon, or even JavaScript, “nested functions” or “local functions” are…

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