* [JAVA-16961] Moved code for article "Create an Empty Map in Java"
* [JAVA-16961] Alter README.md
* [JAVA-16961] Moved code for article "Sorting a Hashset in Java"
* [JAVA-16961] Added links to README.md files
* [JAVA-16961] Revert link changes
* [JAVA-16961] Replaced junit4 with junit5 annotations
* [JAVA-16961] test build
* [JAVA-16961] Added junit annotations
* [JAVA-16961] Added links
Co-authored-by: panagiotiskakos <panagiotis.kakos@libra-is.com>
