Описание тега java-server
DO NOT USE THIS TAG! "Java Server" is an incomplete term and makes therefore no sense as a tag and should be banned. Click "info" for alternate tags you're probably looking for.
If you mean Java Server Faces, use jsf.
If you mean Java Server Pages, use jsp.
If you mean a certain Java (EE) server, use the tag resembling the server name such as wildfly, glassfish, tomee, tomcat, etc.
If you mean Java EE in general, use java-ee.
If you mean to write a homegrown "server" in plain Java SE, use java server, perhaps along with the desired communication protocol, such as http.