Can I get the vault 3.0 server side java version?

I checked the vault 3.0 server side node.js version
, then can I get the vault 3.0 server side java version?

dhx.Vault 3.0 is a completely client-side widjet which supports RESTful api allowing it to communicate equally successful with any backend.
There is an example in the sampels based on the node.js explaining the logic:
https://docs.dhtmlx.com/vault/uploading_files.html

You need to use the simlar solution based on your specific backend.
Unfortuanetly currently there is no any other example of dealing with the server-side.
Also, due to the universal REST api there are no connectors.