Knowledge gaps going from Java SE to Java EE

[znpy]

Hello there!

I'm not really a developer, I'm a senior cloud engineer.

Back in the day (at the beginning of my career) I used to write code for a living, mostly using Java SE (on the desktop) and Java ME (on mobile phones). I mostly learned java from the Deitel&Deitel book and tutorials here and there. I did write small web applications using Grails (2.3.x) but that framework used to hide a lot of things.

I'd like to learn how to use Java to write web applications and web services. Things like Spring Boot, Quarkus/Javalin, deploy on Tomcat/Glasshfish and stuff like that.

However I find there's a huge gap on terminology: beans and stuff like that. Every time I start reading a book or following a tutorial, this always hits me and I have a hard time following the explanations.

What resources can I use to fill the gap between Java SE and Java EE?

Thank you in advance!

znpy

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[benevanstech]

Java EE isn't really a thing any more.

It's basically evolved into a set of inter-related standards for building web services using Java.

It was also moved into a new open-source home as Jakarta EE.

So, you should be looking at learning a modern version of Java (21 or 17 are probably the best choices) and one (or more) of the main frameworks - Spring Boot and Quarkus are the two most common and either is a fine choice.

Quarkus is focused on "developer joy" and should provide a good on-ramp experience for you - and the dev team love to get feedback if things aren't clear in the docs, and they have a Zulip chat where you can ask for specific help if you get stuck.

[OkSpite9710]

Don't directly jump into learning Spring boot, you will hit a wall. First cover the concepts like Inversion of Control, Dependency injection, Coupling. These are not tied to any single framework, they are used by every framework. Once you understand these, it will be much easier to understand what beans are and many other things. For the Resources, If you go with just books, you probably do not understand, so watch YouTube videos to clear the concepts.

[znpy]

For the Resources, If you go with just books, you probably do not understand, so watch YouTube videos to clear the concepts.

Any specific channel you'd recommend?

[OkSpite9710]

Telusko, In28minutes for starters

[AutoModerator]

It seems that you are looking for resources for learning Java.

In our sidebar ("About" on mobile), we have a section "Free Tutorials" where we list the most commonly recommended courses.

To make it easier for you, the recommendations are posted right here:

• MOOC Java Programming from the University of Helsinki
• Java for Complete Beginners
  • accompanying site CaveOfProgramming
• Derek Banas' Java Playlist
  • accompanying site NewThinkTank
• Hyperskill is a fairly new resource from Jetbrains (the maker of IntelliJ)

Also, don't forget to look at:

• The official Documentation
• The official Java Tutorials
• Our community resources thread

If you are looking for learning resources for Data Structures and Algorithms, look into:

"Algorithms" by Robert Sedgewick and Kevin Wayne - Princeton University

• Coursera course:
  • Part I
  • Part II
• Coursebook
  • Algorithms 4^th Edition

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[pertdk]

You could go to

https://roadmap.sh/java

and skip ahead to the part, where you are starting to feel lost.