Does the Java Optional Class finally rid us of NullPointerExceptions? I’ll demonstrate how when Optional is used correctly and when combined with Java’s functional style of programming, that this is indeed possible.
Before Java 9 we were all victims of having implementation details leaking out onto the Classpath, thus making them accessible to everyone. Java’s public access modifier is just too … well public! Lets take a look at how Java 9 Modules give us a substantial boost in providing strong encapsulation …
If your new to Dependency Injection and wondering what it is and why so many use it in their projects, then it might help to start from the beginning with a brief history of Dependency Injection. It all started with the new keyword a long long time ago …
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Are you searching for an alternative to Jenkins for your Java project? I sure was. I wasn’t all that interested in spending time and effort installing and configuring a local Jenkins server or even dishing out money to host one online, to start experimenting. What I found was an alternative which solved all those issues and got me quickly focusing on what I do best, code!
The much anticipated release of JUnit 5 is almost here and Spring 5.0 will have official support for it. However, it’s still possible to run JUnit 5 Tests within your current Spring applications right now. I’ll show you how to bring you testing to the next level by using Spring Boot and JUnit 5. This Post concentrates on the new ability to Dependency Inject right into our @Test method parameters. I warn you though, after getting a taste of this … there’s no going back!
You can achieve some amazing results with Spring Boot Test for your Integration Testing. I’ll be covering how to execute different groups (sub-sets) of Integration Tests which cover different layers (or slices) of your application. Applying this layered approach will give you increased flexibility and the opportunity to identity problem areas earlier on.
There are lots of Dockerfile tips and best practices out there but the problem is, who can remember them all ! In the end, all that matters is building a Docker Image as fast as possible and keeping it lean and mean. I’m going to cover 1 easy to remember Dockerfile tip that will serve you well going forward.
Thinking of migrating your applications to JDK 9? Although there are many changes to be aware of for a successful JDK 9 migration, I’ll focus on summing up the Garbage Collection changes you’ll need to have on your radar in order to avoid some possible surprises.
Tired of setting up your Java Development Environment over and over again for different machines, environments or platforms? Me too! That’s why I now run my Java Developer Environments inside a Docker Container. Problem Solved.
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