Spring framework comes with a module, Spring Testing, that integrates with JUnit 4. It allows us to test Spring beans by wiring them into a JUnit test class. If we are writing an integration test, we may want to mock the dependencies of the bean under test. This article shows how to include those mock objects in a Spring ApplicationContext.
Scheduled for release in 2013, Java 8 will include language support for lambda functions. Although the specification is still in flux, lambdas are already implemented in JDK 8 binaries.
Unless your project is hosted by an approved foundation such as Apache or Codehaus, you won't be able publish artifacts to Maven Central directly. Instead, Sonatype provide their own Nexus repositories for open source projects, and synchronise these with Maven Central.
Hamcrest is a useful library that lets you build assertions declaratively. Having worked with the library for a while now, I've found a few useful patterns and a handful of gotchas when writing Hamcrest matchers.