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The best Java 9 Language and API improvements

Java 9 collections factory methods

In this post, I don’t want to spend time on discussing the module system in detail, but instead, I want to talk about what every Java developer can benefit from: the upcoming API and language changes.

So here’s a list of our favorite API changes in Java 9. Naturally, you can just look at the code examples in the post, to get the gist of what’s shown. But you can also fire up JShell and run these snippets as we talk about them to see for yourself what is going on. I’ll wait for you to start JShell up before continuing… ready? Not yet? Ok… done? Still not? Yeh, it takes a while to warm up… ok it’s started, great! Let’s begin.

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Developer Productivity Survey 2017: Why do you use the tools you use?

We’re excited to launch the survey for the RebelLabs Developer Productivity Report 2017. We’ve done a bunch of survey fuelled reports in the past and try to publish one every year analyzing the responses we get from the community about the tools they use, the technologies considered exciting or dull, the architectures we employ to build software, productivity metrics and so on. If you’ve done this before, know the ropes and just want to get started with the survey, click the fantastic button below and you’re good to go.

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Maven cheat sheet

Java regular expressions cheat sheet

With this post, we continue the series of one-page cheat sheet for Java developers. This time we’ll look at everyone’s favourite topic, regular expressions! Often seen as the tool capable of solving almost any problem, but all too often it’s just a source of other issues.

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Java Web Frameworks Index: February 2017

We’ve gathered the data at the following services: StackOverflow, LinkedIn, GitHub, and Google search, and unified it through a simple, but effective ranking formula. And we rank some of the most prominent Java web frameworks according to this popularity index.

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Solution to the smallest Java class file challenge

Last week we published a short Java challenge that required you to make javac generate the smallest Java class possible.

It got a pretty good response, quite a few of the readers decided to stretch their javac knowledge and try their hands on the challenge.

In this post, I’d like to show you a couple of solutions that I got from our readers.

Spoiler alert! If you want to see whether you can convince javac to generate a smaller class file, this is the right time to stop reading and open your terminal.


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The smallest Java class possible

Today, however, I’d like to pose you a code-golf like challenge:

What’s the smallest Java class you can generate using javac (any vendor, any release)?

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Best JavaFX libraries for beautiful apps and clean code

In this post, I’ll list the libraries which we learned about in the latest Virtual JUG session: The JavaFX Ecosystem by Andres Almiray. Andres has presented on the Virtual JUG before; you might remember his excellent session on how to use Gradle effectively.

The session focused on the open source JavaFX libraries that offer something that you often need in a project. And it was organized by topic: layout, testing, icons, and so on. So we’ll follow that path and cover the JavaFX libraries that Andres gave a shout out to. Disclaimer, this is not the full list of the libraries in the JavaFX ecosystem! But it’s a great place to start if you’re new to JavaFX, or if you have some experience with it and want to get better.

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Java Generics cheat sheet

This post continues our series of one-page printable cheat sheets about Java and related technologies that we’ve been producing for almost a year now.
Today it’s all about Java generics. The feature was added to Java 10 years ago, and even today it still confuses many Java developers.

java-generics-cheat-sheet

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Spring Framework Annotations cheat sheet

This post continues with the series of the cheat sheets that we’ve been producing all year. And this time it’s all about Spring Framework annotations. We look at the annotations that make Spring a flexible, but at the same time a very stable choice of a framework.

rebellabs-spring-annotations-cheat-sheet

You can find tons of tutorials about how you should use Spring — its configuration and a myriad of excellent Spring projects on the internet. We, however, want to provide a one-page reference for the most commonly used annotations. With this, you will always remember which annotations go where. Here we go!

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