The Java SortedSet is a Set which keeps its element sorted internally, so they can be iterated in the sorted order.
The Jackson ObjectMapper is one of the most central classes of the Jackson JSON parser / generator API. The Jackson ObjectMapper tutorial has been updated with information about how to convert from JsonNode to objects, and from objects to JsonNode instances.
The Jackson JsonNode class is a dynamic representation of a JSON object. The JsonNode tutorial has received a major round of updates.
You can configure Maven to build a Fat JAR from your project containing all your project's compiled classes, and all classes of all dependencies your project uses, in single JAR file called a Fat JAR. Very useful for packaging microservices, executable JARs etc. - also inside a Docker container.