Training: Kotlin for Spring developers
Op donderdag 7 november was de training “Kotlin for Spring developers” bij Sourcelabs B.V. op kantoor. In de ochtend stonden de basics van de programmeertaal Kotlin centraal. Theorie werd hierbij …
Compiler Hinting with Kotlin Contracts
Kotlin’s built-in null-safety makes it easy for us to write code that’s less error-prone and less susceptible to the unwanted and unexpected NullpointerException at runtime. We can do a lot to make …
Going functional and fullstack with Spring Fu and Kotlin
Spring Fu is an experimental Kotlin micro-framework that makes it easy to create lightweight Spring-powered applications with functional APIs instead of annotations. Fu is for functional API, but that’s also …
Optional Kotlin
Last week I was working on a code base which had been partially converted from Java to Kotlin. The converted Java code base was making extensive use of java.util.Optional. The …
Kotlin properties – from basic to lazy
Kotlin has many things going for it, with one of the main qualities being its built-in null-safety. This guarantees that properties will always have a non-null value at runtime, greatly …
Kotlin Quick Tip: Annotation targets
If you — like me — are a sucker for reducing boilerplate and are using JSR-303 – Bean Validation (I use it as part of Spring Boot) then you may …
JMockit extensions for Kotlin
Sometimes you have to deal with existing libraries… also libraries that do not provide out-of-the-box support for Kotlin (bastards!). What do you do in such a scenario? Write your own …
Kotlin DSL Development
As all of us who write Java on a daily basis have experienced, we tend to spend a considerable amount of time writing boilerplate code. We can sometimes refactor that …