Setup Tomcat via original tar.gz ball and JDK 11 allow to deploy “war” archive been built for Web Servlet Application from http://lxer.com/module/newswire/view/295844/index.html . Thus CRUD Server side Java Apps might be moved on Debian Bullseye/sid in 3-5 minutes .

Source: LXer – Setting up Tomcat 9.0.41 && mariadb-server 10.5 on Debian Bullseye/sid