Question

I have came from another question to this one:

How can one start with Java (JVM) ecosystem? What are beginner, intermediate and advanced knowledge-bases (bags!)? To be honest Java ecosystem was always a bit confusing to me, so it would be very helpful to provide some “reference references” and “defacto tutorials” for learning (curve!) JVM.

Note: I want to use JVM with Scala (or Clojure) but not Java itself.

I am a C# developer (WPF, Windows Forms, ASP.NET, Web Services, … like that).

Answer 1

The Java Tutorial is a good place to start.

Update: you have enough questions for about a dozen posts here 😉 Honestly, you should do some research yourself (Google is your friend), then ask more specific, targeted questions; that would yield better results. (e.g. I don’t think anyone can answer your question regarding Swing or JavaFX without more specific details about what you are trying to achieve.) I try to give a few pointers below, about areas I know to some extent.

• for servlets and other web frameworks, here is a bunch of tutorials.
• Tomcat and Jetty are both application servers.
• there are a lot of different web frameworks, because different people have differing preferences, ideas and style, so many have created their own framework. It can be confusing, but at least there is choice 🙂
• for persistence, apart from JDBC, ORM frameworks are another strong option. I use Hibernate and I can recommend it; in a bigger project it can make your life much easier. Ultimately it depends on your specific project and constraints; there is no single right choice.
• AFAIK Java has no equivalent of LINQ.

See also this post for further recommendations.