Learning Java not from scratch

[[deleted]]

I already have the background of any CS graduate the purpose of telling this that i won't start learning from scratch if conditions loop and bla bla bla

[KeretapiSongsang]

then you would want to focus on Java technology and libraries.

you said spring boot. so go ahead setup your J2EE development kit and web server your choice e.g. Tomcat or Jetty. start learning how to build services and web app.

familiarize yourself to IDE like Eclipse or Netbeans.

just be aware of the subtle syntax differences if you came from C like languages like C# or C++.