The Java SortedMap is like a Map where the keys are kept sorted internally, so the keys can be iterated later in sort order, or reverse sort order.
Mem Ops for Java, the open source toolkit for memory allocation in apps that require stable memory consumption under high load, is now available in the central Maven repository. The Mem Ops for Java tutorial now describes the Maven coordinates required to use Mem Ops with Maven.
The Docker Dockerfile contains the recipe for how to build a Docker image. You can ask Docker to execute a Dockerfile and build a Docker image as a result.
The Java NavigableSet is a sub-interface of Java SortedSet, with a few extra navigation methods. The Java NavigableSet tutorial has been updated.