Dowload IDE from https://www.jetbrains.com/idea/ Java 15 TOC - https://docs.oracle.com/javase/tutorial/java/TOC.html Java 15 Tutorial - https://docs.oracle.com/javase/tutorial/index.html Java 15 API - https://docs.oracle.com/en/java/javase/15/docs/api/java.base/module-summary.html Java 15 Spec - https://docs.oracle.com/javase/specs/index.html Java-15 https://openjdk.java.net/jeps/0 Its a Spring Boot Appliction.To demo Java 15 concepts... Each package has Application.java which is standalone class to demo the topics. Microservices https://github.com/eventuate-tram/eventuate-tram-core https://github.com/eventuate-tram/eventuate-tram-examples-java-spring-todo-list https://github.com/eventuate-tram/eventuate-tram-core-examples-basic https://github.com/eventuate-tram/eventuate-tram-core-examples-basic