thank you for your post.
First, you cannot use hyphens as name of linguistic terms. Instead of VERY-SHORT, please change it to VERY_SHORT, and same with the other terms.
Second, if you are using the Maven repository, there is a bug in that version. Please use the latest jfuzzylite version, which can be downloaded from fuzzylite.com/downloads or from github.com/fuzzylite/jfuzzylite/releases
Let me know if it helps.