Learn about the benefits and drawbacks Optional objects can bring and how to use them to properly refactor your code. Hint: Don't use them with isPresent().
Everyone's salivating over Project Jigsaw, but JDK 9 offers plenty more. From new stream sources and features to enhanced deprecation, see what the kit has to offer.
Learn to be a better Java programmer by mastering Java 8 API design, exposing a well-designed API, making sure that client code can use lambdas, and more.
Got duplicate code? Learn how to get rid of it while making what's left work for you. A skeletal implementation gets your interface and Abstract class working together.
Skipping the execution of tests during the Release plugin execution might improve your release time because the Maven Release Plugin already executes the same tests twice.
Thread dumps are vital artifacts to diagnose CPU spikes, deadlocks, memory problems, unresponsive applications, poor response times, and other system problems.
Custom argument matchers and custom answer behavior allow us to use Mockito to mock complex and responsive behavior, making for highly realistic tests.