Immutable Value Objects in Java with Google AutoValue

Java 8 addressed many of the biggest pain points in the Java language, from lambda expressions and functional-style collection operations to the new Joda-like date and time API.

One notable miss is something like Scala’s case classes or Kotlin’s data classes: a simple way to define immutable value objects. The amount of boilerplate for a class holding just a couple of fields is ridiculous: you need not just a constructor, member variables and setters but most likely also equals, hashCode, and toString implementations, resulting in 50 lines of code in Java versus 1 line in Scala.

Attempts to make things easier range from IDE code generation to the Project Lombok hack. Thankfully, 20 days ago Google released version 1.0 of AutoValue, arguably the best solution to date.

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A look at RoboVM: iOS apps in Java

RoboVM is one of the projects I’ve been keeping a close eye on for a while now. Its aim is to allow native iOS apps to be developed in Java. With its recent 1.0 beta 2 release I thought it was time to take it for another spin.

If you ever tried maintaining an app with two separate codebases for Android and iOS at some point you probably wished for a way to share code between the two, reducing duplication and saving development time. I certainly did. And so did Google for their Inbox app apparently – they ended up writing their J2ObjC Java to Objective C transpiler.

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